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Is there a good way to adjust the size of a UITextView to conform to its content? Say for instance I have a UITextView that contains one line of text:
"Hello world"
I then add another line of text:
"Goodbye world"
Is there a good way in Cocoa Touch to get the rect that will hold all of the lines in the text view so that I can adjust the parent view accordingly?
As another example, look at the notes' field for events in the Calendar application - note how the cell (and the UITextView it contains) expands to hold all lines of text in the notes' string.
This works for both iOS 6.1 and iOS 7:
- (void)textViewDidChange:(UITextView *)textView
{
CGFloat fixedWidth = textView.frame.size.width;
CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = textView.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
textView.frame = newFrame;
}
Or in Swift (Works with Swift 4.1 in iOS 11)
let fixedWidth = textView.frame.size.width
let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: max(newSize.width, fixedWidth), height: newSize.height)
If you want support for iOS 6.1 then you should also:
textview.scrollEnabled = NO;
This no longer works on iOS 7 or above
There is actually a very easy way to do resizing of the UITextView to its correct height of the content. It can be done using the UITextView contentSize.
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;
One thing to note is that the correct contentSize is only available after the UITextView has been added to the view with addSubview. Prior to that it is equal to frame.size
This will not work if auto layout is ON. With auto layout, the general approach is to use the sizeThatFits method and update the constant value on a height constraint.
CGSize sizeThatShouldFitTheContent = [_textView sizeThatFits:_textView.frame.size];
heightConstraint.constant = sizeThatShouldFitTheContent.height;
heightConstraint is a layout constraint that you typically setup via a IBOutlet by linking the property to the height constraint created in a storyboard.
Just to add to this amazing answer, 2014, if you:
[self.textView sizeToFit];
there is a difference in behaviour with the iPhone6+ only:
With the 6+ only (not the 5s or 6) it does add "one more blank line" to the UITextView. The "RL solution" fixes this perfectly:
CGRect _f = self.mainPostText.frame;
_f.size.height = self.mainPostText.contentSize.height;
self.mainPostText.frame = _f;
It fixes the "extra line" problem on 6+.
Very easy working solution using code and storyboard both.
By Code
textView.scrollEnabled = false
By Storyboard
Uncheck the Scrolling Enable
No need to do anything apart of this.
Update
The key thing you need to do is turn off scrolling in your UITextView.
myTextView.scrollEnabled = #NO
Original Answer
To make a dynamically sizing UITextView inside a UITableViewCell, I found the following combination works in Xcode 6 with the iOS 8 SDK:
Add a UITextView to a UITableViewCell and constrain it to the sides
Set the UITextView's scrollEnabled property to NO. With scrolling enabled, the frame of the UITextView is independent of its content size, but with scrolling disabled, there is a relationship between the two.
If your table is using the original default row height of 44 then it will automatically calculate row heights, but if you changed the default row height to something else, you may need to manually switch on auto-calculation of row heights in viewDidLoad:
tableView.estimatedRowHeight = 150;
tableView.rowHeight = UITableViewAutomaticDimension;
For read-only dynamically sizing UITextViews, that’s it. If you’re allowing users to edit the text in your UITextView, you also need to:
Implement the textViewDidChange: method of the UITextViewDelegate protocol, and tell the tableView to repaint itself every time the text is edited:
- (void)textViewDidChange:(UITextView *)textView;
{
[tableView beginUpdates];
[tableView endUpdates];
}
And don’t forget to set the UITextView delegate somewhere, either in Storyboard or in tableView:cellForRowAtIndexPath:
Swift :
textView.sizeToFit()
In my (limited) experience,
- (CGSize)sizeWithFont:(UIFont *)font forWidth:(CGFloat)width lineBreakMode:(UILineBreakMode)lineBreakMode
does not respect newline characters, so you can end up with a lot shorter CGSize than is actually required.
- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size
does seem to respect the newlines.
Also, the text isn't actually rendered at the top of the UITextView. In my code, I set the new height of the UITextView to be 24 pixels larger than the height returned by the sizeOfFont methods.
In iOS6, you can check the contentSize property of UITextView right after you set the text. In iOS7, this will no longer work. If you want to restore this behavior for iOS7, place the following code in a subclass of UITextView.
- (void)setText:(NSString *)text
{
[super setText:text];
if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
CGRect rect = [self.textContainer.layoutManager usedRectForTextContainer:self.textContainer];
UIEdgeInsets inset = self.textContainerInset;
self.contentSize = UIEdgeInsetsInsetRect(rect, inset).size;
}
}
I will post right solution at the bottom of the page in case someone is brave (or despaired enough) to read to this point.
Here is gitHub repo for those, who don't want to read all that text: resizableTextView
This works with iOs7 (and I do believe it will work with iOs8) and with autolayout. You don't need magic numbers, disable layout and stuff like that. Short and elegant solution.
I think, that all constraint-related code should go to updateConstraints method. So, let's make our own ResizableTextView.
The first problem we meet here is that don't know real content size before viewDidLoad method. We can take long and buggy road and calculate it based on font size, line breaks, etc. But we need robust solution, so we'll do:
CGSize contentSize = [self sizeThatFits:CGSizeMake(self.frame.size.width, FLT_MAX)];
So now we know real contentSize no matter where we are: before or after viewDidLoad. Now add height constraint on textView (via storyboard or code, no matter how). We'll adjust that value with our contentSize.height:
[self.constraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
if (constraint.firstAttribute == NSLayoutAttributeHeight) {
constraint.constant = contentSize.height;
*stop = YES;
}
}];
The last thing to do is to tell superclass to updateConstraints.
[super updateConstraints];
Now our class looks like:
ResizableTextView.m
- (void) updateConstraints {
CGSize contentSize = [self sizeThatFits:CGSizeMake(self.frame.size.width, FLT_MAX)];
[self.constraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
if (constraint.firstAttribute == NSLayoutAttributeHeight) {
constraint.constant = contentSize.height;
*stop = YES;
}
}];
[super updateConstraints];
}
Pretty and clean, right? And you don't have to deal with that code in your controllers!
But wait!
Y NO ANIMATION!
You can easily animate changes to make textView stretch smoothly. Here is an example:
[self.view layoutIfNeeded];
// do your own text change here.
self.infoTextView.text = [NSString stringWithFormat:#"%#, %#", self.infoTextView.text, self.infoTextView.text];
[self.infoTextView setNeedsUpdateConstraints];
[self.infoTextView updateConstraintsIfNeeded];
[UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionLayoutSubviews animations:^{
[self.view layoutIfNeeded];
} completion:nil];
Did you try [textView sizeThatFits:textView.bounds] ?
Edit: sizeThatFits returns the size but does not actually resize the component. I'm not sure if that's what you want, or if [textView sizeToFit] is more what you were looking for. In either case, I do not know if it will perfectly fit the content like you want, but it's the first thing to try.
Another method is the find the size a particular string will take up using the NSString method:
-(CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size
This returns the size of the rectangle that fits the given string with the given font. Pass in a size with the desired width and a maximum height, and then you can look at the height returned to fit the text. There is a version that lets you specify line break mode also.
You can then use the returned size to change the size of your view to fit.
We can do it by constraints .
Set Height constraints for UITextView.
2.Create IBOutlet for that height constraint.
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *txtheightconstraints;
3.don't forget to set delegate for your textview.
4.
-(void)textViewDidChange:(UITextView *)textView
{
CGFloat fixedWidth = textView.frame.size.width;
CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = textView.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
NSLog(#"this is updating height%#",NSStringFromCGSize(newFrame.size));
[UIView animateWithDuration:0.2 animations:^{
_txtheightconstraints.constant=newFrame.size.height;
}];
}
then update your constraint like this :)
If you don't have the UITextView handy (for example, you're sizing table view cells), you'll have to calculate the size by measuring the string, then accounting for the 8 pt of padding on each side of a UITextView. For example, if you know the desired width of your text view and want to figure out the corresponding height:
NSString * string = ...;
CGFloat textViewWidth = ...;
UIFont * font = ...;
CGSize size = CGSizeMake(textViewWidth - 8 - 8, 100000);
size.height = [string sizeWithFont:font constrainedToSize:size].height + 8 + 8;
Here, each 8 is accounting for one of the four padded edges, and 100000 just serves as a very large maximum size.
In practice, you may want to add an extra font.leading to the height; this adds a blank line below your text, which may look better if there are visually heavy controls directly beneath the text view.
Starting with iOS 8, it is possible to use the auto layout features of a UITableView to automatically resize a UITextView with no custom code at all. I have put a project in github that demonstrates this in action, but here is the key:
The UITextView must have scrolling disabled, which you can do programmatically or through the interface builder. It will not resize if scrolling is enabled because scrolling lets you view the larger content.
In viewDidLoad for the UITableViewController, you must set a value for estimatedRowHeight and then set the rowHeight to UITableViewAutomaticDimension.
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.estimatedRowHeight = self.tableView.rowHeight;
self.tableView.rowHeight = UITableViewAutomaticDimension;
}
The project deployment target must be iOS 8 or greater.
I reviewed all the answers and all are keeping fixed width and adjust only height. If you wish to adjust also width you can very easily use this method:
so when configuring your text view, set scroll disabled
textView.isScrollEnabled = false
and then in delegate method func textViewDidChange(_ textView: UITextView) add this code:
func textViewDidChange(_ textView: UITextView) {
let newSize = textView.sizeThatFits(CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
textView.frame = CGRect(origin: textView.frame.origin, size: newSize)
}
Outputs:
I found out a way to resize the height of a text field according to the text inside it and also arrange a label below it based on the height of the text field! Here is the code.
UITextView *_textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 10, 300, 10)];
NSString *str = #"This is a test text view to check the auto increment of height of a text view. This is only a test. The real data is something different.";
_textView.text = str;
[self.view addSubview:_textView];
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;
UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 5 + frame.origin.y + frame.size.height, 300, 20)];
lbl.text = #"Hello!";
[self.view addSubview:lbl];
Guys using autolayout and your sizetofit isn't working, then please check your width constraint once. If you had missed the width constraint then the height will be accurate.
No need to use any other API. just one line would fix all the issue.
[_textView sizeToFit];
Here, I was only concerned with height, keeping the width fixed and had missed the width constraint of my TextView in storyboard.
And this was to show up the dynamic content from the services.
Hope this might help..
The following things are enough:
Just remember to set scrolling enabled to NO for your UITextView:
Properly set Auto Layout Constraints.
You may even use UITableViewAutomaticDimension.
Using UITextViewDelegate is the easiest way:
func textViewDidChange(_ textView: UITextView) {
textView.sizeToFit()
textviewHeight.constant = textView.contentSize.height
}
Combined with Mike McMaster's answer, you might want to do something like:
[myTextView setDelegate: self];
...
- (void)textViewDidChange:(UITextView *)textView {
if (myTextView == textView) {
// it changed. Do resizing here.
}
}
disable scrolling
add constaints
and add your text
[yourTextView setText:#"your text"];
[yourTextView layoutIfNeeded];
if you use UIScrollView you should add this too;
[yourScrollView layoutIfNeeded];
-(void)viewDidAppear:(BOOL)animated{
CGRect contentRect = CGRectZero;
for (UIView *view in self.yourScrollView.subviews) {
contentRect = CGRectUnion(contentRect, view.frame);
}
self.yourScrollView.contentSize = contentRect.size;
}
This worked nicely when I needed to make text in a UITextView fit a specific area:
// The text must already be added to the subview, or contentviewsize will be wrong.
- (void) reduceFontToFit: (UITextView *)tv {
UIFont *font = tv.font;
double pointSize = font.pointSize;
while (tv.contentSize.height > tv.frame.size.height && pointSize > 7.0) {
pointSize -= 1.0;
UIFont *newFont = [UIFont fontWithName:font.fontName size:pointSize];
tv.font = newFont;
}
if (pointSize != font.pointSize)
NSLog(#"font down to %.1f from %.1f", pointSize, tv.font.pointSize);
}
here is the swift version of #jhibberd
let cell:MsgTableViewCell! = self.tableView.dequeueReusableCellWithIdentifier("MsgTableViewCell", forIndexPath: indexPath) as? MsgTableViewCell
cell.msgText.text = self.items[indexPath.row]
var fixedWidth:CGFloat = cell.msgText.frame.size.width
var size:CGSize = CGSize(width: fixedWidth,height: CGFloat.max)
var newSize:CGSize = cell.msgText.sizeThatFits(size)
var newFrame:CGRect = cell.msgText.frame;
newFrame.size = CGSizeMake(CGFloat(fmaxf(Float(newSize.width), Float(fixedWidth))), newSize.height);
cell.msgText.frame = newFrame
cell.msgText.frame.size = newSize
return cell
For iOS 7.0, instead of setting the frame.size.height to the contentSize.height (which currently does nothing) use [textView sizeToFit].
See this question.
This works fine for Swift 5 in case you want to fit your TextView once user write text on the fly.
Just implement UITextViewDelegate with:
func textViewDidChange(_ textView: UITextView) {
let newSize = textView.sizeThatFits(CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: newSize.width, height: newSize.height)
}
if any other get here, this solution work for me, 1"Ronnie Liew"+4"user63934" (My text arrive from web service):
note the 1000 (nothing can be so big "in my case")
UIFont *fontNormal = [UIFont fontWithName:FONTNAME size:FONTSIZE];
NSString *dealDescription = [client objectForKey:#"description"];
//4
CGSize textSize = [dealDescription sizeWithFont:fontNormal constrainedToSize:CGSizeMake(containerUIView.frame.size.width, 1000)];
CGRect dealDescRect = CGRectMake(10, 300, containerUIView.frame.size.width, textSize.height);
UITextView *dealDesc = [[[UITextView alloc] initWithFrame:dealDescRect] autorelease];
dealDesc.text = dealDescription;
//add the subview to the container
[containerUIView addSubview:dealDesc];
//1) after adding the view
CGRect frame = dealDesc.frame;
frame.size.height = dealDesc.contentSize.height;
dealDesc.frame = frame;
And that is... Cheers
Hope this helps:
- (void)textViewDidChange:(UITextView *)textView {
CGSize textSize = textview.contentSize;
if (textSize != textView.frame.size)
textView.frame.size = textSize;
}
The Best way which I found out to re-size the height of the UITextView according to the size of the text.
CGSize textViewSize = [YOURTEXTVIEW.text sizeWithFont:[UIFont fontWithName:#"SAMPLE_FONT" size:14.0]
constrainedToSize:CGSizeMake(YOURTEXTVIEW.frame.size.width, FLT_MAX)];
or You can USE
CGSize textViewSize = [YOURTEXTVIEW.text sizeWithFont:[UIFont fontWithName:#"SAMPLE_FONT" size:14.0]
constrainedToSize:CGSizeMake(YOURTEXTVIEW.frame.size.width, FLT_MAX) lineBreakMode:NSLineBreakByTruncatingTail];
For those who want the textview to actually move up and maintain the bottom line position
CGRect frame = textView.frame;
frame.size.height = textView.contentSize.height;
if(frame.size.height > textView.frame.size.height){
CGFloat diff = frame.size.height - textView.frame.size.height;
textView.frame = CGRectMake(0, textView.frame.origin.y - diff, textView.frame.size.width, frame.size.height);
}
else if(frame.size.height < textView.frame.size.height){
CGFloat diff = textView.frame.size.height - frame.size.height;
textView.frame = CGRectMake(0, textView.frame.origin.y + diff, textView.frame.size.width, frame.size.height);
}
The only code that will work is the one that uses 'SizeToFit' as in jhibberd answer above but actually it won't pick up unless you call it in ViewDidAppear or wire it to UITextView text changed event.
Based on Nikita Took's answer I came to the following solution in Swift which works on iOS 8 with autolayout:
descriptionTxt.scrollEnabled = false
descriptionTxt.text = yourText
var contentSize = descriptionTxt.sizeThatFits(CGSizeMake(descriptionTxt.frame.size.width, CGFloat.max))
for c in descriptionTxt.constraints() {
if c.isKindOfClass(NSLayoutConstraint) {
var constraint = c as! NSLayoutConstraint
if constraint.firstAttribute == NSLayoutAttribute.Height {
constraint.constant = contentSize.height
break
}
}
}
I'd like my UILabel to show my data in multiple lines, and the data is fetch from txt file.
I've searched online for this question, and all the answers show that I just need to set lineBreakMode to NSLineBreakByWordWrapping and numberOfLines = 0. However, the problem is that, even though I added these settings, the labels shows fewer lines than expected (my data has 4 lines, however the label only shows 2 lines). Here's my code:
-(void)updateFileContentLabel:(NSString*)content{
self.fileContentLabel.text = content;
self.fileContentLabel.lineBreakMode = NSLineBreakByWordWrapping;
self.fileContentLabel.font = [UIFont systemFontOfSize:17.0f];
self.fileContentLabel.numberOfLines = 0;
[self.fileContentLabel sizeToFit];
NSLog(#"file Label: %#",self.fileContentLabel.text);
}
As you see, I have a NSLog to show the content of label's text. And the text of label in NSLog is correct (4 lines). However on the phone or simulator, it only shows 2 lines instead of 4. Does anyone know where is the problem? Thanks!
Probably your UILabel is just not big enough. Solutions:
1.Increase a label size.
2.Add following code to allow UILabel to decrease the font size if needed.
self.fileContentLabel.minimumScaleFactor = 0.5;
I was only able to replicate your problem when I was using auto layout and didn't have constraints set up for fileContentLabel, so check that out.
Use the following method to calculate the height of text and set the frame of label accordingly.
- (CGSize)boundingSizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(NSLineBreakMode)lineBreakMode
{
CGSize stringSize;
if ([self respondsToSelector:#selector(boundingRectWithSize:options:attributes:context:)]) {
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = lineBreakMode;
NSDictionary * stringAttributes = #{ NSFontAttributeName: font, paragraphStyle: NSParagraphStyleAttributeName};
stringSize = [self boundingRectWithSize:size
options:NSStringDrawingUsesLineFragmentOrigin
attributes:stringAttributes context:nil].size;
stringSize = CGSizeMake(ceil(stringSize.width), ceil(stringSize.height) + 2);
} else {
stringSize = [self sizeWithFont:font constrainedToSize:size lineBreakMode:lineBreakMode];
}
return stringSize;
}
I am using an UITextView that will be expandable by taping a "more" button. The problem is the following:
On iOS6 I use this,
self.DescriptionTextView.text = #"loong string";
if(self.DescriptionTextView.contentSize.height>self.DescriptionTextView.frame.size.height) {
//set up the more button
}
The problem is that on iOS7 the contentSize.height returns a different value (far smaller) than the value it returns on iOS6.
Why is this? How to fix it?
The content size property no longer works as it did on iOS 6. Using sizeToFit as others suggest may or may not work depending on a number of factors.
It didn't work for me, so I use this instead:
- (CGFloat)measureHeightOfUITextView:(UITextView *)textView
{
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1)
{
// This is the code for iOS 7. contentSize no longer returns the correct value, so
// we have to calculate it.
//
// This is partly borrowed from HPGrowingTextView, but I've replaced the
// magic fudge factors with the calculated values (having worked out where
// they came from)
CGRect frame = textView.bounds;
// Take account of the padding added around the text.
UIEdgeInsets textContainerInsets = textView.textContainerInset;
UIEdgeInsets contentInsets = textView.contentInset;
CGFloat leftRightPadding = textContainerInsets.left + textContainerInsets.right + textView.textContainer.lineFragmentPadding * 2 + contentInsets.left + contentInsets.right;
CGFloat topBottomPadding = textContainerInsets.top + textContainerInsets.bottom + contentInsets.top + contentInsets.bottom;
frame.size.width -= leftRightPadding;
frame.size.height -= topBottomPadding;
NSString *textToMeasure = textView.text;
if ([textToMeasure hasSuffix:#"\n"])
{
textToMeasure = [NSString stringWithFormat:#"%#-", textView.text];
}
// NSString class method: boundingRectWithSize:options:attributes:context is
// available only on ios7.0 sdk.
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineBreakMode:NSLineBreakByWordWrapping];
NSDictionary *attributes = #{ NSFontAttributeName: textView.font, NSParagraphStyleAttributeName : paragraphStyle };
CGRect size = [textToMeasure boundingRectWithSize:CGSizeMake(CGRectGetWidth(frame), MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributes
context:nil];
CGFloat measuredHeight = ceilf(CGRectGetHeight(size) + topBottomPadding);
return measuredHeight;
}
else
{
return textView.contentSize.height;
}
}
Try the answer in the following link, layoutIfNeeded should be called before contentSize.
iOS7 UITextView contentsize.height alternative
The answer:
In iOS7, UITextView uses NSLayoutManager to layout text:
// If YES, then the layout manager may perform glyph generation and layout for a given portion of the text, without having glyphs or layout for preceding portions. The default is NO. Turning this setting on will significantly alter which portions of the text will have glyph generation or layout performed when a given generation-causing method is invoked. It also gives significant performance benefits, especially for large documents.
#property(NS_NONATOMIC_IOSONLY) BOOL allowsNonContiguousLayout;
disable allowsNonContiguousLayout to fix contentSize :
textView.layoutManager.allowsNonContiguousLayout = NO;
This link seems to have the answer.
You must use sizeToFit before using contentSize.
Try with following code, Its will be work in both iOS6 and 7, please try it.
CGSize myTextViewSize = [self.myTextView sizeThatFits:CGSizeMake(self.myTextView.frame.size.width, FLT_MAX)];
self.myTextView.height = myTextViewSize.height;
NSLog(#"%f", self.myTextView.height);
I currently have a UILabel:
factLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 100, 280, 100)];
factLabel.text = #"some text some text some text some text";
factLabel.backgroundColor = [UIColor clearColor];
factLabel.lineBreakMode = UILineBreakModeWordWrap;
factLabel.numberOfLines = 10;
[self.view addSubview:factLabel];
Throughout the life of my iOS application, factLabel gets a bunch of different values. Some with multiple sentences, others with just 5 or 6 words.
How can I set up the UILabel so that the font size changes so that the text always fits in the bounds I defined?
Single line:
factLabel.numberOfLines = 1;
factLabel.minimumFontSize = 8;
factLabel.adjustsFontSizeToFitWidth = YES;
The above code will adjust your text's font size down to (for example) 8 trying to fit your text within the label.
numberOfLines = 1 is mandatory.
Multiple lines:
For numberOfLines > 1 there is a method to figure out the size of final text through NSString's sizeWithFont:... UIKit addition methods, for example:
CGSize lLabelSize = [yourText sizeWithFont:factLabel.font
forWidth:factLabel.frame.size.width
lineBreakMode:factLabel.lineBreakMode];
After that you can just resize your label using resulting lLabelSize, for example (assuming that you will change only label's height):
factLabel.frame = CGRectMake(factLabel.frame.origin.x, factLabel.frame.origin.y, factLabel.frame.size.width, lLabelSize.height);
iOS6
Single line:
Starting with iOS6, minimumFontSize has been deprecated. The line
factLabel.minimumFontSize = 8.;
can be changed to:
factLabel.minimumScaleFactor = 8./factLabel.font.pointSize;
iOS7
Multiple lines:
Starting with iOS7, sizeWithFont becomes deprecated.
Multiline case is reduced to:
factLabel.numberOfLines = 0;
factLabel.lineBreakMode = NSLineBreakByWordWrapping;
CGSize maximumLabelSize = CGSizeMake(factLabel.frame.size.width, CGFLOAT_MAX);
CGSize expectSize = [factLabel sizeThatFits:maximumLabelSize];
factLabel.frame = CGRectMake(factLabel.frame.origin.x, factLabel.frame.origin.y, expectSize.width, expectSize.height);
iOS 13 (Swift 5):
label.adjustsFontSizeToFitWidth = true
label.minimumScaleFactor = 0.5
minimumFontSize has been deprecated with iOS 6. You can use minimumScaleFactor.
yourLabel.adjustsFontSizeToFitWidth=YES;
yourLabel.minimumScaleFactor=0.5;
This will take care of your font size according width of label and text.
Single line- There are two ways, you can simply change.
1- Pragmatically (Swift 3)
Just add the following code
yourLabel.numberOfLines = 1;
yourLabel.minimumScaleFactor = 0.7;
yourLabel.adjustsFontSizeToFitWidth = true;
2 - Using UILabel Attributes inspector
i- Select your label- Set number of lines 1.
ii- Autoshrink- Select Minimum Font Scale from drop down
iii- Set Minimum Font Scale value as you wish , I have set 0.7 as in below image. (default is 0.5)
Based on #Eyal Ben Dov's answer you may want to create a category to make it flexible to use within another apps of yours.
Obs.: I've updated his code to make compatible with iOS 7
-Header file
#import <UIKit/UIKit.h>
#interface UILabel (DynamicFontSize)
-(void) adjustFontSizeToFillItsContents;
#end
-Implementation file
#import "UILabel+DynamicFontSize.h"
#implementation UILabel (DynamicFontSize)
#define CATEGORY_DYNAMIC_FONT_SIZE_MAXIMUM_VALUE 35
#define CATEGORY_DYNAMIC_FONT_SIZE_MINIMUM_VALUE 3
-(void) adjustFontSizeToFillItsContents
{
NSString* text = self.text;
for (int i = CATEGORY_DYNAMIC_FONT_SIZE_MAXIMUM_VALUE; i>CATEGORY_DYNAMIC_FONT_SIZE_MINIMUM_VALUE; i--) {
UIFont *font = [UIFont fontWithName:self.font.fontName size:(CGFloat)i];
NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:#{NSFontAttributeName: font}];
CGRect rectSize = [attributedText boundingRectWithSize:CGSizeMake(self.frame.size.width, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin context:nil];
if (rectSize.size.height <= self.frame.size.height) {
self.font = [UIFont fontWithName:self.font.fontName size:(CGFloat)i];
break;
}
}
}
#end
-Usage
#import "UILabel+DynamicFontSize.h"
[myUILabel adjustFontSizeToFillItsContents];
Cheers
It's 2015. I had to go to find a blog post that would explain how to do it for the latest version of iOS and XCode with Swift so that it would work with multiple lines.
set “Autoshrink” to “Minimum font size.”
set the font to the largest desirable font size (I chose 20)
Change “Line Breaks” from “Word Wrap” to “Truncate Tail.”
Source:
http://beckyhansmeyer.com/2015/04/09/autoshrinking-text-in-a-multiline-uilabel/
Swift version:
textLabel.adjustsFontSizeToFitWidth = true
textLabel.minimumScaleFactor = 0.5
Here's a Swift extension for UILabel. It runs a binary search algorithm to resize the font based off the width and height of the label's bounds. Tested to work with iOS 9 and autolayout.
USAGE: Where <label> is your pre-defined UILabel that needs font resizing
<label>.fitFontForSize()
By Default, this function searches in within the range of 5pt and 300pt font sizes and sets the font to fit its text "perfectly" within the bounds (accurate within 1.0pt). You could define the parameters so that it, for example, searches between 1pt and the label's current font size accurately within 0.1pts in the following way:
<label>.fitFontForSize(1.0, maxFontSize: <label>.font.pointSize, accuracy:0.1)
Copy/Paste the following code into your file
extension UILabel {
func fitFontForSize(var minFontSize : CGFloat = 5.0, var maxFontSize : CGFloat = 300.0, accuracy : CGFloat = 1.0) {
assert(maxFontSize > minFontSize)
layoutIfNeeded() // Can be removed at your own discretion
let constrainedSize = bounds.size
while maxFontSize - minFontSize > accuracy {
let midFontSize : CGFloat = ((minFontSize + maxFontSize) / 2)
font = font.fontWithSize(midFontSize)
sizeToFit()
let checkSize : CGSize = bounds.size
if checkSize.height < constrainedSize.height && checkSize.width < constrainedSize.width {
minFontSize = midFontSize
} else {
maxFontSize = midFontSize
}
}
font = font.fontWithSize(minFontSize)
sizeToFit()
layoutIfNeeded() // Can be removed at your own discretion
}
}
NOTE: Each of the layoutIfNeeded() calls can be removed at your own discretion
Its a little bit not sophisticated but this should work,
for example lets say you want to cap your uilabel to 120x120, with max font size of 28:
magicLabel.numberOfLines = 0;
magicLabel.lineBreakMode = NSLineBreakByWordWrapping;
...
magicLabel.text = text;
for (int i = 28; i>3; i--) {
CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:(CGFloat)i] constrainedToSize:CGSizeMake(120.0f, CGFLOAT_MAX) lineBreakMode:NSLineBreakByWordWrapping];
if (size.height < 120) {
magicLabel.font = [UIFont systemFontOfSize:(CGFloat)i];
break;
}
}
Just send the sizeToFit message to the UITextView. It will adjust its own height to just fit its text. It will not change its own width or origin.
[textViewA1 sizeToFit];
Swift 2.0 Version:
private func adapteSizeLabel(label: UILabel, sizeMax: CGFloat) {
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
let maximumLabelSize = CGSizeMake(label.frame.size.width, sizeMax);
let expectSize = label.sizeThatFits(maximumLabelSize)
label.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y, expectSize.width, expectSize.height)
}
This solution works for multiline:
After following several articles, and requiring a function that would automatically scale the text and adjust the line count to best fit within the given label size, I wrote a function myself. (ie. a short string would fit nicely on one line and use a large amount of the label frame, whereas a long strong would automatically split onto 2 or 3 lines and adjust the size accordingly)
Feel free to re-use it and tweak as required. Make sure you call it after viewDidLayoutSubviews has finished so that the initial label frame has been set.
+ (void)setFontForLabel:(UILabel *)label withMaximumFontSize:(float)maxFontSize andMaximumLines:(int)maxLines {
int numLines = 1;
float fontSize = maxFontSize;
CGSize textSize; // The size of the text
CGSize frameSize; // The size of the frame of the label
CGSize unrestrictedFrameSize; // The size the text would be if it were not restricted by the label height
CGRect originalLabelFrame = label.frame;
frameSize = label.frame.size;
textSize = [label.text sizeWithAttributes:#{NSFontAttributeName:[UIFont systemFontOfSize: fontSize]}];
// Work out the number of lines that will need to fit the text in snug
while (((textSize.width / numLines) / (textSize.height * numLines) > frameSize.width / frameSize.height) && (numLines < maxLines)) {
numLines++;
}
label.numberOfLines = numLines;
// Get the current text size
label.font = [UIFont systemFontOfSize:fontSize];
textSize = [label.text boundingRectWithSize:CGSizeMake(frameSize.width, CGFLOAT_MAX)
options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
attributes:#{NSFontAttributeName : label.font}
context:nil].size;
// Adjust the frame size so that it can fit text on more lines
// so that we do not end up with truncated text
label.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y, label.frame.size.width, label.frame.size.width);
// Get the size of the text as it would fit into the extended label size
unrestrictedFrameSize = [label textRectForBounds:CGRectMake(0, 0, label.bounds.size.width, CGFLOAT_MAX) limitedToNumberOfLines:numLines].size;
// Keep reducing the font size until it fits
while (textSize.width > unrestrictedFrameSize.width || textSize.height > frameSize.height) {
fontSize--;
label.font = [UIFont systemFontOfSize:fontSize];
textSize = [label.text boundingRectWithSize:CGSizeMake(frameSize.width, CGFLOAT_MAX)
options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
attributes:#{NSFontAttributeName : label.font}
context:nil].size;
unrestrictedFrameSize = [label textRectForBounds:CGRectMake(0, 0, label.bounds.size.width, CGFLOAT_MAX) limitedToNumberOfLines:numLines].size;
}
// Set the label frame size back to original
label.frame = originalLabelFrame;
}
Here is the fill code of a UILabel subclass that implements animated font size change:
#interface SNTextLayer : CATextLayer
#end
#implementation SNTextLayer
- (void)drawInContext:(CGContextRef)ctx {
// We override this to make text appear at the same vertical positon as in UILabel
// (otherwise it's shifted tdown)
CGFloat height = self.bounds.size.height;
float fontSize = self.fontSize;
// May need to adjust this somewhat if it's not aligned perfectly in your implementation
float yDiff = (height-fontSize)/2 - fontSize/10;
CGContextSaveGState(ctx);
CGContextTranslateCTM(ctx, 0.0, yDiff);
[super drawInContext:ctx];
CGContextRestoreGState(ctx);
}
#end
#interface SNAnimatableLabel ()
#property CATextLayer* textLayer;
#end
#interface SNAnimatableLabel : UILabel
- (void)animateFontToSize:(CGFloat)fontSize withDuration:(double)duration;
#end
#implementation SNAnimatableLabel
- (void)awakeFromNib {
[super awakeFromNib];
_textLayer = [SNTextLayer new];
_textLayer.backgroundColor = self.backgroundColor.CGColor;
_textLayer.foregroundColor = self.textColor.CGColor;
_textLayer.font = CGFontCreateWithFontName((CFStringRef)self.font.fontName);
_textLayer.frame = self.bounds;
_textLayer.string = self.text;
_textLayer.fontSize = self.font.pointSize;
_textLayer.contentsScale = [UIScreen mainScreen].scale;
[_textLayer setPosition: CGPointMake(CGRectGetMidX(_textLayer.frame), CGRectGetMidY(_textLayer.frame))];
[_textLayer setAnchorPoint: CGPointMake(0.5, 0.5)];
[_textLayer setAlignmentMode: kCAAlignmentCenter];
self.textColor = self.backgroundColor;
// Blend text with background, so that it doens't interfere with textlayer text
[self.layer addSublayer:_textLayer];
self.layer.masksToBounds = NO;
}
- (void)setText:(NSString *)text {
_textLayer.string = text;
super.text = text;
}
- (void)layoutSubviews {
[super layoutSubviews];
// Need to enlarge the frame, otherwise the text may get clipped for bigger font sizes
_textLayer.frame = CGRectInset(self.bounds, -5, -5);
}
- (void)animateFontToSize:(CGFloat)fontSize withDuration:(double)duration {
[CATransaction begin];
[CATransaction setAnimationDuration:duration];
_textLayer.fontSize = fontSize;
[CATransaction commit];
}
Is there a good way to adjust the size of a UITextView to conform to its content? Say for instance I have a UITextView that contains one line of text:
"Hello world"
I then add another line of text:
"Goodbye world"
Is there a good way in Cocoa Touch to get the rect that will hold all of the lines in the text view so that I can adjust the parent view accordingly?
As another example, look at the notes' field for events in the Calendar application - note how the cell (and the UITextView it contains) expands to hold all lines of text in the notes' string.
This works for both iOS 6.1 and iOS 7:
- (void)textViewDidChange:(UITextView *)textView
{
CGFloat fixedWidth = textView.frame.size.width;
CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = textView.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
textView.frame = newFrame;
}
Or in Swift (Works with Swift 4.1 in iOS 11)
let fixedWidth = textView.frame.size.width
let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: max(newSize.width, fixedWidth), height: newSize.height)
If you want support for iOS 6.1 then you should also:
textview.scrollEnabled = NO;
This no longer works on iOS 7 or above
There is actually a very easy way to do resizing of the UITextView to its correct height of the content. It can be done using the UITextView contentSize.
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;
One thing to note is that the correct contentSize is only available after the UITextView has been added to the view with addSubview. Prior to that it is equal to frame.size
This will not work if auto layout is ON. With auto layout, the general approach is to use the sizeThatFits method and update the constant value on a height constraint.
CGSize sizeThatShouldFitTheContent = [_textView sizeThatFits:_textView.frame.size];
heightConstraint.constant = sizeThatShouldFitTheContent.height;
heightConstraint is a layout constraint that you typically setup via a IBOutlet by linking the property to the height constraint created in a storyboard.
Just to add to this amazing answer, 2014, if you:
[self.textView sizeToFit];
there is a difference in behaviour with the iPhone6+ only:
With the 6+ only (not the 5s or 6) it does add "one more blank line" to the UITextView. The "RL solution" fixes this perfectly:
CGRect _f = self.mainPostText.frame;
_f.size.height = self.mainPostText.contentSize.height;
self.mainPostText.frame = _f;
It fixes the "extra line" problem on 6+.
Very easy working solution using code and storyboard both.
By Code
textView.scrollEnabled = false
By Storyboard
Uncheck the Scrolling Enable
No need to do anything apart of this.
Update
The key thing you need to do is turn off scrolling in your UITextView.
myTextView.scrollEnabled = #NO
Original Answer
To make a dynamically sizing UITextView inside a UITableViewCell, I found the following combination works in Xcode 6 with the iOS 8 SDK:
Add a UITextView to a UITableViewCell and constrain it to the sides
Set the UITextView's scrollEnabled property to NO. With scrolling enabled, the frame of the UITextView is independent of its content size, but with scrolling disabled, there is a relationship between the two.
If your table is using the original default row height of 44 then it will automatically calculate row heights, but if you changed the default row height to something else, you may need to manually switch on auto-calculation of row heights in viewDidLoad:
tableView.estimatedRowHeight = 150;
tableView.rowHeight = UITableViewAutomaticDimension;
For read-only dynamically sizing UITextViews, that’s it. If you’re allowing users to edit the text in your UITextView, you also need to:
Implement the textViewDidChange: method of the UITextViewDelegate protocol, and tell the tableView to repaint itself every time the text is edited:
- (void)textViewDidChange:(UITextView *)textView;
{
[tableView beginUpdates];
[tableView endUpdates];
}
And don’t forget to set the UITextView delegate somewhere, either in Storyboard or in tableView:cellForRowAtIndexPath:
Swift :
textView.sizeToFit()
In my (limited) experience,
- (CGSize)sizeWithFont:(UIFont *)font forWidth:(CGFloat)width lineBreakMode:(UILineBreakMode)lineBreakMode
does not respect newline characters, so you can end up with a lot shorter CGSize than is actually required.
- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size
does seem to respect the newlines.
Also, the text isn't actually rendered at the top of the UITextView. In my code, I set the new height of the UITextView to be 24 pixels larger than the height returned by the sizeOfFont methods.
In iOS6, you can check the contentSize property of UITextView right after you set the text. In iOS7, this will no longer work. If you want to restore this behavior for iOS7, place the following code in a subclass of UITextView.
- (void)setText:(NSString *)text
{
[super setText:text];
if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1) {
CGRect rect = [self.textContainer.layoutManager usedRectForTextContainer:self.textContainer];
UIEdgeInsets inset = self.textContainerInset;
self.contentSize = UIEdgeInsetsInsetRect(rect, inset).size;
}
}
I will post right solution at the bottom of the page in case someone is brave (or despaired enough) to read to this point.
Here is gitHub repo for those, who don't want to read all that text: resizableTextView
This works with iOs7 (and I do believe it will work with iOs8) and with autolayout. You don't need magic numbers, disable layout and stuff like that. Short and elegant solution.
I think, that all constraint-related code should go to updateConstraints method. So, let's make our own ResizableTextView.
The first problem we meet here is that don't know real content size before viewDidLoad method. We can take long and buggy road and calculate it based on font size, line breaks, etc. But we need robust solution, so we'll do:
CGSize contentSize = [self sizeThatFits:CGSizeMake(self.frame.size.width, FLT_MAX)];
So now we know real contentSize no matter where we are: before or after viewDidLoad. Now add height constraint on textView (via storyboard or code, no matter how). We'll adjust that value with our contentSize.height:
[self.constraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
if (constraint.firstAttribute == NSLayoutAttributeHeight) {
constraint.constant = contentSize.height;
*stop = YES;
}
}];
The last thing to do is to tell superclass to updateConstraints.
[super updateConstraints];
Now our class looks like:
ResizableTextView.m
- (void) updateConstraints {
CGSize contentSize = [self sizeThatFits:CGSizeMake(self.frame.size.width, FLT_MAX)];
[self.constraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
if (constraint.firstAttribute == NSLayoutAttributeHeight) {
constraint.constant = contentSize.height;
*stop = YES;
}
}];
[super updateConstraints];
}
Pretty and clean, right? And you don't have to deal with that code in your controllers!
But wait!
Y NO ANIMATION!
You can easily animate changes to make textView stretch smoothly. Here is an example:
[self.view layoutIfNeeded];
// do your own text change here.
self.infoTextView.text = [NSString stringWithFormat:#"%#, %#", self.infoTextView.text, self.infoTextView.text];
[self.infoTextView setNeedsUpdateConstraints];
[self.infoTextView updateConstraintsIfNeeded];
[UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionLayoutSubviews animations:^{
[self.view layoutIfNeeded];
} completion:nil];
Did you try [textView sizeThatFits:textView.bounds] ?
Edit: sizeThatFits returns the size but does not actually resize the component. I'm not sure if that's what you want, or if [textView sizeToFit] is more what you were looking for. In either case, I do not know if it will perfectly fit the content like you want, but it's the first thing to try.
Another method is the find the size a particular string will take up using the NSString method:
-(CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size
This returns the size of the rectangle that fits the given string with the given font. Pass in a size with the desired width and a maximum height, and then you can look at the height returned to fit the text. There is a version that lets you specify line break mode also.
You can then use the returned size to change the size of your view to fit.
We can do it by constraints .
Set Height constraints for UITextView.
2.Create IBOutlet for that height constraint.
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *txtheightconstraints;
3.don't forget to set delegate for your textview.
4.
-(void)textViewDidChange:(UITextView *)textView
{
CGFloat fixedWidth = textView.frame.size.width;
CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = textView.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
NSLog(#"this is updating height%#",NSStringFromCGSize(newFrame.size));
[UIView animateWithDuration:0.2 animations:^{
_txtheightconstraints.constant=newFrame.size.height;
}];
}
then update your constraint like this :)
If you don't have the UITextView handy (for example, you're sizing table view cells), you'll have to calculate the size by measuring the string, then accounting for the 8 pt of padding on each side of a UITextView. For example, if you know the desired width of your text view and want to figure out the corresponding height:
NSString * string = ...;
CGFloat textViewWidth = ...;
UIFont * font = ...;
CGSize size = CGSizeMake(textViewWidth - 8 - 8, 100000);
size.height = [string sizeWithFont:font constrainedToSize:size].height + 8 + 8;
Here, each 8 is accounting for one of the four padded edges, and 100000 just serves as a very large maximum size.
In practice, you may want to add an extra font.leading to the height; this adds a blank line below your text, which may look better if there are visually heavy controls directly beneath the text view.
Starting with iOS 8, it is possible to use the auto layout features of a UITableView to automatically resize a UITextView with no custom code at all. I have put a project in github that demonstrates this in action, but here is the key:
The UITextView must have scrolling disabled, which you can do programmatically or through the interface builder. It will not resize if scrolling is enabled because scrolling lets you view the larger content.
In viewDidLoad for the UITableViewController, you must set a value for estimatedRowHeight and then set the rowHeight to UITableViewAutomaticDimension.
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.estimatedRowHeight = self.tableView.rowHeight;
self.tableView.rowHeight = UITableViewAutomaticDimension;
}
The project deployment target must be iOS 8 or greater.
I reviewed all the answers and all are keeping fixed width and adjust only height. If you wish to adjust also width you can very easily use this method:
so when configuring your text view, set scroll disabled
textView.isScrollEnabled = false
and then in delegate method func textViewDidChange(_ textView: UITextView) add this code:
func textViewDidChange(_ textView: UITextView) {
let newSize = textView.sizeThatFits(CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
textView.frame = CGRect(origin: textView.frame.origin, size: newSize)
}
Outputs:
I found out a way to resize the height of a text field according to the text inside it and also arrange a label below it based on the height of the text field! Here is the code.
UITextView *_textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 10, 300, 10)];
NSString *str = #"This is a test text view to check the auto increment of height of a text view. This is only a test. The real data is something different.";
_textView.text = str;
[self.view addSubview:_textView];
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;
UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 5 + frame.origin.y + frame.size.height, 300, 20)];
lbl.text = #"Hello!";
[self.view addSubview:lbl];
Guys using autolayout and your sizetofit isn't working, then please check your width constraint once. If you had missed the width constraint then the height will be accurate.
No need to use any other API. just one line would fix all the issue.
[_textView sizeToFit];
Here, I was only concerned with height, keeping the width fixed and had missed the width constraint of my TextView in storyboard.
And this was to show up the dynamic content from the services.
Hope this might help..
The following things are enough:
Just remember to set scrolling enabled to NO for your UITextView:
Properly set Auto Layout Constraints.
You may even use UITableViewAutomaticDimension.
Using UITextViewDelegate is the easiest way:
func textViewDidChange(_ textView: UITextView) {
textView.sizeToFit()
textviewHeight.constant = textView.contentSize.height
}
Combined with Mike McMaster's answer, you might want to do something like:
[myTextView setDelegate: self];
...
- (void)textViewDidChange:(UITextView *)textView {
if (myTextView == textView) {
// it changed. Do resizing here.
}
}
disable scrolling
add constaints
and add your text
[yourTextView setText:#"your text"];
[yourTextView layoutIfNeeded];
if you use UIScrollView you should add this too;
[yourScrollView layoutIfNeeded];
-(void)viewDidAppear:(BOOL)animated{
CGRect contentRect = CGRectZero;
for (UIView *view in self.yourScrollView.subviews) {
contentRect = CGRectUnion(contentRect, view.frame);
}
self.yourScrollView.contentSize = contentRect.size;
}
This worked nicely when I needed to make text in a UITextView fit a specific area:
// The text must already be added to the subview, or contentviewsize will be wrong.
- (void) reduceFontToFit: (UITextView *)tv {
UIFont *font = tv.font;
double pointSize = font.pointSize;
while (tv.contentSize.height > tv.frame.size.height && pointSize > 7.0) {
pointSize -= 1.0;
UIFont *newFont = [UIFont fontWithName:font.fontName size:pointSize];
tv.font = newFont;
}
if (pointSize != font.pointSize)
NSLog(#"font down to %.1f from %.1f", pointSize, tv.font.pointSize);
}
here is the swift version of #jhibberd
let cell:MsgTableViewCell! = self.tableView.dequeueReusableCellWithIdentifier("MsgTableViewCell", forIndexPath: indexPath) as? MsgTableViewCell
cell.msgText.text = self.items[indexPath.row]
var fixedWidth:CGFloat = cell.msgText.frame.size.width
var size:CGSize = CGSize(width: fixedWidth,height: CGFloat.max)
var newSize:CGSize = cell.msgText.sizeThatFits(size)
var newFrame:CGRect = cell.msgText.frame;
newFrame.size = CGSizeMake(CGFloat(fmaxf(Float(newSize.width), Float(fixedWidth))), newSize.height);
cell.msgText.frame = newFrame
cell.msgText.frame.size = newSize
return cell
For iOS 7.0, instead of setting the frame.size.height to the contentSize.height (which currently does nothing) use [textView sizeToFit].
See this question.
This works fine for Swift 5 in case you want to fit your TextView once user write text on the fly.
Just implement UITextViewDelegate with:
func textViewDidChange(_ textView: UITextView) {
let newSize = textView.sizeThatFits(CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: newSize.width, height: newSize.height)
}
if any other get here, this solution work for me, 1"Ronnie Liew"+4"user63934" (My text arrive from web service):
note the 1000 (nothing can be so big "in my case")
UIFont *fontNormal = [UIFont fontWithName:FONTNAME size:FONTSIZE];
NSString *dealDescription = [client objectForKey:#"description"];
//4
CGSize textSize = [dealDescription sizeWithFont:fontNormal constrainedToSize:CGSizeMake(containerUIView.frame.size.width, 1000)];
CGRect dealDescRect = CGRectMake(10, 300, containerUIView.frame.size.width, textSize.height);
UITextView *dealDesc = [[[UITextView alloc] initWithFrame:dealDescRect] autorelease];
dealDesc.text = dealDescription;
//add the subview to the container
[containerUIView addSubview:dealDesc];
//1) after adding the view
CGRect frame = dealDesc.frame;
frame.size.height = dealDesc.contentSize.height;
dealDesc.frame = frame;
And that is... Cheers
Hope this helps:
- (void)textViewDidChange:(UITextView *)textView {
CGSize textSize = textview.contentSize;
if (textSize != textView.frame.size)
textView.frame.size = textSize;
}
The Best way which I found out to re-size the height of the UITextView according to the size of the text.
CGSize textViewSize = [YOURTEXTVIEW.text sizeWithFont:[UIFont fontWithName:#"SAMPLE_FONT" size:14.0]
constrainedToSize:CGSizeMake(YOURTEXTVIEW.frame.size.width, FLT_MAX)];
or You can USE
CGSize textViewSize = [YOURTEXTVIEW.text sizeWithFont:[UIFont fontWithName:#"SAMPLE_FONT" size:14.0]
constrainedToSize:CGSizeMake(YOURTEXTVIEW.frame.size.width, FLT_MAX) lineBreakMode:NSLineBreakByTruncatingTail];
For those who want the textview to actually move up and maintain the bottom line position
CGRect frame = textView.frame;
frame.size.height = textView.contentSize.height;
if(frame.size.height > textView.frame.size.height){
CGFloat diff = frame.size.height - textView.frame.size.height;
textView.frame = CGRectMake(0, textView.frame.origin.y - diff, textView.frame.size.width, frame.size.height);
}
else if(frame.size.height < textView.frame.size.height){
CGFloat diff = textView.frame.size.height - frame.size.height;
textView.frame = CGRectMake(0, textView.frame.origin.y + diff, textView.frame.size.width, frame.size.height);
}
The only code that will work is the one that uses 'SizeToFit' as in jhibberd answer above but actually it won't pick up unless you call it in ViewDidAppear or wire it to UITextView text changed event.
Based on Nikita Took's answer I came to the following solution in Swift which works on iOS 8 with autolayout:
descriptionTxt.scrollEnabled = false
descriptionTxt.text = yourText
var contentSize = descriptionTxt.sizeThatFits(CGSizeMake(descriptionTxt.frame.size.width, CGFloat.max))
for c in descriptionTxt.constraints() {
if c.isKindOfClass(NSLayoutConstraint) {
var constraint = c as! NSLayoutConstraint
if constraint.firstAttribute == NSLayoutAttribute.Height {
constraint.constant = contentSize.height
break
}
}
}