My application requires the user to enter few details which are then displayed via another view by using labels.
As the user can enter variable length of text, while the label initially had a fixed length and breadth, I used a code like the following to adjust the label size:
CGSize maximumLabelSize = CGSizeMake(296,9999);
CGSize expectedLabelSize = [yourString sizeWithFont:yourLabel.font
constrainedToSize:maximumLabelSize
lineBreakMode:yourLabel.lineBreakMode];
//adjust the label the the new height.
CGRect newFrame = yourLabel.frame;
newFrame.size.height = expectedLabelSize.height;
yourLabel.frame = newFrame;
The problem with these modifications is that I have many labels one after the other. So when I change the length of one label, all the following labels also need to be transformed/moved to new locations.
Is there any way that I can change the size and location of all labels dynamically, while ensuring that the final presentation is as good as it was in case of fixed length labels?
int h=10; // Initial Height as you want
for(int k=0;k<[headItemArray count];k++) {
CGSize size_txt_overview1 = [[headItemArray objectAtIndex:k] sizeWithFont:[UIFont fontWithName:#"Helvetica" size:18] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
UILabel *lbl_headitem = [[UILabel alloc]initWithFrame:CGRectMake(3,h, 690, size_txt_overview1.height)];// See the 'h' value
lbl_headitem.text = [headItemArray objectAtIndex:k];
[lbl_headitem setTextAlignment:UITextAlignmentLeft];
[lbl_headitem setBackgroundColor:[UIColor clearColor]];
[lbl_headitem setTag:k];
lbl_headitem.numberOfLines=0;
[lbl_headitem setTextColor:[UIColor redColor]];
[lbl_headitem setFont:[UIFont fontWithName:#"Helvetica" size:18]];
[scrollAttributes addSubview:lbl_headitem];
h = h + size_txt_overview1.height;// important
}
Related
I have no idea why the height of my UILabel is expanding to such a great height. It leaves the text of my UILabel in the centre. I don't want all of this extra space...
Unwanted extra space
Here is my code (I set the text before this point):
self.infoDescription.numberOfLines = 0;
[self.infoDescription sizeToFit];
self.infoDescription.frame = CGRectMake(20, self.infoAdultSize.frame.size.height+self.infoAdultSize.frame.origin.y+10, self.infoView.frame.size.width-40, self.infoDescription.frame.size.height);
Please help :( I just want the height of the UILabel to fit the text exactly.
First set the frame and then make size to fit of label.
**self.infoDescription.frame = CGRectMake(20, self.infoAdultSize.frame.size.height+self.infoAdultSize.frame.origin.y+10, self.infoView.frame.size.width-40, self.infoDescription.frame.size.height);
[self.infoDescription sizeToFit];**
Try this:
CGSize maximumSize = CGSizeMake(300, 9999);
NSString *myString = #"This is a long string which wraps";
UIFont *myFont = [UIFont fontWithName:#"Helvetica" size:14];
CGSize myStringSize = [myString sizeWithFont:myFont
constrainedToSize:maximumSize
lineBreakMode:self.myLabel.lineBreakMode];
(original source)
Please check this answer it works for me and it is exactly what you are looking for.
//Calculate the expected size based on the font and linebreak mode of your label
// FLT_MAX here simply means no constraint in height
CGSize maximumLabelSize = CGSizeMake(296, FLT_MAX);
CGSize expectedLabelSize = [yourString sizeWithFont:yourLabel.font constrainedToSize:maximumLabelSize lineBreakMode:yourLabel.lineBreakMode];
//adjust the label the the new height.
CGRect newFrame = yourLabel.frame;
newFrame.size.height = expectedLabelSize.height;
yourLabel.frame = newFrame;
I am dynamically creating UILabel in my app to display a list of directions for a recipe. The labels populate correctly displaying all the items one after another.
The problem is when the text goes on next line of the label, it is overlapped with the next label.
I have set numberOfLines to 0 and also set lineBreakMode to NSLineBreakByWordWrapping. This helps the label to display text on multiple lines.
I have tried to adjust the height of the label, as you will see in the code, but it doesn't work.
How do I prevent the overlapping of labels due to multiline text in label?
Here is the code for populating the labels with multilines:
//add all the directions to the uiview
for (int i = 0; i < self.recipe.directions.count; i++)
{
UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0,(i+1)*25,280,25)];
label.lineBreakMode = NSLineBreakByWordWrapping; //multiple lines in a label
label.numberOfLines = 0;
label.text =[NSString stringWithFormat: #"%#", self.recipe.directions[i]];
[label sizeToFit]; // resize the width and height to fit the text
NSLog(#"Actual height is: %f", label.frame.size.height); // Use this for spacing any further elements
CGSize expectedLabelSize = [label.text sizeWithFont:label.font
constrainedToSize:label.frame.size
lineBreakMode:NSLineBreakByWordWrapping];
//adjust the label the the new height.
CGRect newFrame = label.frame;
newFrame.size.height = expectedLabelSize.height;
label.frame = newFrame;
[self.directionsView addSubview:label];
}
Instead of initialising your label with an y position of (i+1)*25, you should store your last label's bottom position
CGFloat lastLabelBottomCoordinate = 25;
CGFloat spaceBetweenLines = 10;
for (int i = 0; i < 10; i++)
{
UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0, lastLabelBottomCoordinate + spaceBetweenLines,280,25)];
label.lineBreakMode = NSLineBreakByWordWrapping; //multiple lines in a label
label.numberOfLines = 0;
label.text =[NSString stringWithFormat: #"This is a very long text to see if the text have more than 2 lines"];
[label sizeToFit]; // resize the width and height to fit the text
NSLog(#"Actual height is: %f", label.frame.size.height); // Use this for spacing any further elements
CGSize expectedLabelSize = [label.text boundingRectWithSize:CGSizeMake(label.frame.size.width, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{NSFontAttributeName : label.font}
context:nil].size;
//adjust the label the the new height.
CGRect newFrame = label.frame;
newFrame.size.height = expectedLabelSize.height;
label.frame = newFrame;
lastLabelBottomCoordinate = label.frame.origin.y + label.frame.size.height;
[self.view addSubview:label];
}
This is how it looks:
It´s a pretty basic problem but I couldn´t find a proper solution for it. I have several circles which have text in it like you can see in the picture. The text gets loaded dynamically and has a size from one word up to five words or more. The goal is to put the text as big as possible into the circle. New lines can appear but every individual word should stay together. The example image is kind of ok but I would prefer the text to be bigger because there is still some free space between the text and the circle. The circle is 80x80. All solution I tried cropped the text strangly or the text is too small.
How I create the label:
UILabel *buttonlabel = [[UILabel alloc] initWithFrame:CGRectMake(12,7,57,64)];
[buttonlabel setText: #"Recipes"];
buttonlabel.font = [UIFont fontWithName:#"HelveticaNeue-Light" size:18.0f];
buttonlabel.textColor = [UIColor whiteColor];
buttonlabel.textAlignment = NSTextAlignmentCenter;
buttonlabel.lineBreakMode = NSLineBreakByWordWrapping;
buttonlabel.numberOfLines = 3;
[button addSubview:buttonlabel];
[buttonlabel release];
EDIT:
So I tried the solution of Rufel. I think the shrinking kind of works but my words get ripped apart. Even though I have buttonlabel.lineBreakMode = NSLineBreakByWordWrapping;
It looks like this:
This is my code. I also implemented the other methods mentioned in an answer.
//Create the button labels
UILabel *buttonlabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 60, 60)];
[buttonlabel setText: #"text";
buttonlabel.textColor = [UIColor whiteColor];
buttonlabel.textAlignment = NSTextAlignmentCenter;
buttonlabel.lineBreakMode = NSLineBreakByWordWrapping;
buttonlabel.numberOfLines = 0;
CGFloat fontSize = 20; // The max font size you want to use
CGFloat labelHeightWithFont = 0;
UIFont *labelFont = nil;
do {
// Trying the current font size if it fits
labelFont = [UIFont systemFontOfSize:fontSize--];
CGRect boundingRect = [self boundingRectForString:subcatbuttontitlesarray[buttonTag-1] font:labelFont];
labelHeightWithFont = boundingRect.size.height;
// Loop until the text at the current size fits the maximum width/height.
} while (labelHeightWithFont > [self buttonLabelMaxWidth]);
buttonlabel.text = subcatbuttontitlesarray[buttonTag-1];
buttonlabel.font = labelFont;
- (CGRect)boundingRectForString:(NSString *)string font:(UIFont *)font
{
return [string boundingRectWithSize:CGSizeMake([self buttonLabelMaxWidth], MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:#{NSFontAttributeName: font}
context:nil];
}
- (CGFloat)buttonLabelMaxWidth
{
CGFloat hypotenuse = CGRectGetWidth(CGRectMake(0, 0, 60, 60));
CGFloat rightTriangleCathetus = sqrtf((hypotenuse*hypotenuse)/2);
return rightTriangleCathetus;
}
I found this thread here:
iOS7 - Adjusting font size of multiline label to fit its frame
which has the same problem.
Edit 2:
After searching a complete day for the solution and trying all kinds of combinations of the label attributes I somehow figured out that the "numberoflines" is my culprit. So I came up with this dumb solution of counting the words in the string and adjust the number of lines based on the numbers of the string:
NSString *samplestring = #"Three words string";
//Count the words in this string
int times = [[samplestring componentsSeparatedByString:#" "] count]-1;
UILabel *testlabel = [[UILabel alloc]initWithFrame:CGRectMake(30, 30, 60, 60)];
[testlabel setText:samplestring];
[testlabel setFont:[UIFont fontWithName:#"HelveticaNeue-UltraLight" size:40.0f]];
[testlabel setBackgroundColor:[UIColor redColor]];
[testlabel setAdjustsFontSizeToFitWidth:YES];
[testlabel setTextAlignment:NSTextAlignmentCenter];
//My workaround
if(times ==0){
[testlabel setNumberOfLines:1];
}else{
if(times==1){
[testlabel setNumberOfLines:2];
}
else{
[testlabel setNumberOfLines:3];
}}
[self.view addSubview:testlabel];
What you want to do, I think, is to ask the NSString for its boundingRectWithSize:options:attributes:context:. By setting the width of the bounding rect, you can find out what the height would be. You can use the parametric formula for the circle to determine whether that bounding rect fits entirely within the center of the circle. Unfortunately you will have to perform a kind of trial-and-error sequence of approximations, where the text gets larger and larger until the top and bottom stick out of the circle, and then narrow the proposed width and see whether this causes the height to grow too much because the text now wraps an extra time.
Say you have a custom view in which you draw a circle that fits its frame (80x80 in your example).
You will first want to find the maximum width your label can take without letters crossing the circle:
- (CGFloat)buttonLabelMaxWidth
{
CGFloat hypotenuse = CGRectGetWidth(self.bounds);
CGFloat rightTriangleCathetus = sqrtf((hypotenuse*hypotenuse)/2);
return floorf(rightTriangleCathetus);
}
Next, when you pass the title to display, you will want to iterate by decreasing an initially oversized font until the resulting string boundary fits the width previously calculated (which is also the maximum height since it's a circle). UPDATE: You will also want to check every words in the title to be sure they are not being truncated (that they fit the maximum width).
- (void)setButtonTitle:(NSString *)title
{
CGFloat fontSize = 20; // The max font size you want to use
CGFloat minimumFontSize = 5; // The min font size you want to use
CGFloat labelHeightWithFont = 0;
CGFloat longestWordWidth = 0;
UIFont *labelFont = nil;
CGFloat buttonLabelMaxWidth = [self buttonLabelMaxWidth];
do {
if (fontSize < minimumFontSize) {
// Handle exception where the title just won't fit
break;
}
// Trying the current font size if it fits
labelFont = [UIFont systemFontOfSize:fontSize--];
CGSize boundingSize = [self boundingSizeForString:title font:labelFont];
labelHeightWithFont = boundingSize.height;
// Be sure that words are not truncated (that they fits in the maximum width)
longestWordWidth = 0;
for (NSString *word in [title componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]) {
CGSize wordSize = [word sizeWithAttributes:#{NSFontAttributeName: labelFont}];
longestWordWidth = MAX(longestWordWidth, wordSize.width);
}
// Loop until the text at the current size fits the maximum width/height.
} while (labelHeightWithFont > buttonLabelMaxWidth || longestWordWidth > buttonLabelMaxWidth);
self.buttonLabel.text = title;
self.buttonLabel.font = labelFont;
}
- (CGSize)boundingSizeForString:(NSString *)string font:(UIFont *)font
{
CGRect boundingRect = [string boundingRectWithSize:CGSizeMake([self buttonLabelMaxWidth], MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:#{NSFontAttributeName: font}
context:nil];
return CGSizeMake(ceilf(boundingRect.size.width), ceilf(boundingRect.size.height));
}
CGFloat constrainedSize = 500.0f;
UIFont * myFont = [UIFont fontWithName:#"Arial" size:19]; //or any other font that matches what you will use in the UILabel
CGSize textSize = [myText sizeWithFont: myFont
constrainedToSize:CGSizeMake(constrainedSize, CGFLOAT_MAX)
lineBreakMode:NSLineBreakByWordWrapping];
lblDescription=[[UILabel alloc]initWithFrame:CGRectMake(10,y, 300,textSize.height)];
i have tried this code for manage the dynamic text. but if the data comes larger it will not display the whole text.
You constrain the size to width = 500pt, but your textfield is only 300pt wide.
Edit:
It seems, I wasn't clear. If you calculate the height of the label with sizeWithFont and give as constraint a width of 500pt (constrainedSize) and use the calculated height then on a label with only 300pt width, the calculated height is not correct.
This is how it works for me:
CGFloat constrainedSize = 300.0f;
UIFont * myFont = [UIFont fontWithName:#"Arial" size:19]; //or any other font that matches what you will use in the UILabel
CGSize textSize = [myText sizeWithFont: myFont
constrainedToSize:CGSizeMake(constrainedSize, CGFLOAT_MAX)
lineBreakMode:NSLineBreakByWordWrapping];
UILabel* lblDescription=[[UILabel alloc]initWithFrame:CGRectMake(10.0, 10.0, constrainedSize, textSize.height)];
lblDescription.lineBreakMode = NSLineBreakByWordWrapping;
lblDescription.numberOfLines = 0;
lblDescription.font = myFont;
lblDescription.text = myText;
Again: use the same attributes for the label (font, size, lineBreakMode) as you use for the calculation, otherwise it won't fit.
That's because you are alloc and initing the UILabel, and never reset it's frame for bigger size text.
Simply set the frame of the UILabel after a text size change.
This line sets the size of the label, to textSize.height and it doesn't change.
lblDescription=[[UILabel alloc]initWithFrame:CGRectMake(10,y, 300,textSize.height)];
You can call setFrame to programmatically change this.
To display a larger text/Multiline text you should use UITextView instead. It is designed to handle this issue.
hi here is code to set dynamic text in label
CGSize maximumLabelSize = CGSizeMake(300,9999);
CGSize expectedLabelSize = [label.text sizeWithFont:label.font
constrainedToSize:maximumLabelSize
lineBreakMode:label.lineBreakMode];
CGRect newFrame = label.frame;
newFrame.size.height = expectedLabelSize.height;
label.frame = newFrame;
i hope this is helping to you..
I have a UILabel, his text size has the property
title.adjustsFontSizeToFitWidth = YES;
that prevents me from using standard methods to resize the UILabel. I read on another post here that I'm supposed to use the function
sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode
from this answer: How to figure out the font size of a UILabel when -adjustsFontSizeToFitWidth is set to YES?
Now, i can't figure out how to make it work.. this is the actual code
UIFont *font = [UIFont fontWithName:#"Marker Felt" size:200];
UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 20.0)];
title.text = #"this is a long title that should be resized";
title.font = font;
title.numberOfLines = 1;
title.adjustsFontSizeToFitWidth = YES;
CGFloat pointSize = 0.0;
CGSize size = [title.text sizeWithFont:font
minFontSize:title.minimumFontSize
actualFontSize:&pointSize
forWidth:width
lineBreakMode:title.lineBreakMode];
title.frame = CGRectMake(title.frame.origin.x,
title.frame.origin.y,
size.width,
size.height);
The UILabel get resized wrongly, as if the font size it's still 200..
Any clues? Thanks!
I have some code you could use on my github, check it out, it's a category for UILabel, you need to set the frame width and when you can resizeToFit on the UILabel, it adjusts the height to fit the content, and returns the y position of the end of the label so you can adjust any content appearing after it.
https://gist.github.com/1005520
I'd suggest filing this as a bug.
The size returned by -sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode: has the correct width, but not the height does not account for the actual font size.
It seems likely that UILabel also has this bug. Changing the size of a label to match the height of the text in a font of the size returned by -sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode: will incorrectly vertically position the text within the label.
A work-around is to calculate the correct height, and change the font on the label to with the actual font size:
CGFloat pointSize = 0.0f;
CGRect frame = title.frame;
frame.size = [title.text sizeWithFont:font
minFontSize:title.minimumFontSize
actualFontSize:&pointSize
forWidth:width
lineBreakMode:title.lineBreakMode];
UIFont *actualFont = [UIFont fontWithName:#"Marker Felt" size:pointSize];
CGSize sizeWithCorrectHeight = [title.text sizeWithFont:actualFont];
frame.size.height = sizeWithCorrectHeight.height;
title.frame = frame;
title.font = actualFont;
Try to create font with smaller fontSize. For example:
UIFont *font = [UIFont fontWithName:#"Marker Felt" size:20];
but to actualFontSize pass link to CGFloat == 200.
UPDATED:
try this then:
UIFont *font = [UIFont fontWithName:#"Marker Felt" size:20];
UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 20.0)];
title.text = #"this is a long title that should be resized";
title.font = font;
title.numberOfLines = 1;
title.adjustsFontSizeToFitWidth = YES;
CGFloat pointSize = 0.0;
CGSize size = [title.text sizeWithFont:font minFontSize:title.minimumFontSize actualFontSize:&pointSize forWidth:width lineBreakMode:title.lineBreakMode];
title.frame = CGRectMake(title.frame.origin.x, title.frame.origin.y, size.width, size.height);
font = [UIFont fontWithName:#"Marker Felt" size:200];
title.font = font;
UILabel * label = [[UILabel alloc] init];
[label setNumberOfLines:0];
label.text=[detailDict valueForKey:#"method"];
[label setFont:[UIFont fontWithName:#"Georgia" size:16.0]];
CGSize labelsize=[label.text sizeWithFont:label.font constrainedToSize:CGSizeMake(250, 1000.0) lineBreakMode:UILineBreakModeWordWrap];
int y=0;
label.frame=CGRectMake(38, y, 245, labelsize.height);
[label setBackgroundColor:[UIColor clearColor]];
[label setTextColor:[UIColor whiteColor]];
scrollView.showsVerticalScrollIndicator = NO;
y+=labelsize.height;
[scrollView setContentSize:CGSizeMake(200,y+50)];
[scrollView addSubview:label];
[label release];
I think you should use this code and i am using the label on scrollview for a big text you can also do so
Have you tried intrinsicContentSize?
myLable.numberOfLines = 0
myLable.frame = CGRect(x: 10, y: 10, width: 300, height: lblSuperscript.intrinsicContentSize().height)