I need to add a sentence into my view. But the sentence is quite big. So i would like to put it inside a defined CGRect, with several lines, and change the font size, that all sentence will be visible in this CGRect. And the font size should be as big as it is possible.
Here the code that i am using:
NSAttributedString *sentence = [[NSAttributedString alloc] initWithString:#"The sentence with some words" attributes:#{NSFontAttributeName: wordsFont,NSBackgroundColorAttributeName:[UIColor yellowColor]}];
CGRect sentenceBounds;
sentenceBounds.size = [sentence size];
CGSize neededSize = CGSizeMake(MAX_WIDTH, MAX_HAIGHT);
sentenceBounds.size = neededSize;
sentenceBounds.origin = CGPointMake(0, 0);
[sentence drawInRect:sentenceBounds];
All of the functionality you're looking for is included with UILabel. Is there a reason you can't just use that?
UILabel *label = [UILabel new];
label.adjustsFontSizeToFitWidth = YES;
label.numberOfLines = 0;
label.attributedText = sentence;
label.frame = CGRectZero; //set desired frame here;
[self addSubview:label];
Related
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));
}
I have a little question. I developed an application that automatically fills a data set obtained from a SQLite database. These data are drawn from dynamic way, and between the data I have a frame where I insert labels dynamically. I never know the exact number of labels inside these frame because I take data from different tables of my Database. The problem I have with the labels which texts within them do not fill within the width of the label. I tried to use label.linebreakmode but still makes the break. I post the code:
There I have many objects taken from previous code, like widthFormato and widthImageFormato
if([tipoVino length]!=0){
UILabel *lblFormato = [[UILabel alloc] init];
labelX = ((widthFormato-widthImageFormatos) / 2)+10;
CGRect labelFrame = lblFormato.frame;
labelFrame.size.width = widthImageFormatos;
labelFrame.origin.x = labelX;
labelFrame.origin.y = labelY+25;
lblFormato.frame = labelFrame;
lblFormato.numberOfLines = 0;
lblFormato.lineBreakMode = NSLineBreakByWordWrapping;
[lblFormato setText:[NSString stringWithFormat:#"- %#",tipoVino]];
lblFormato.textColor = [UIColor whiteColor];
labelY = lblFormato.frame.origin.y;
[formatosImageView addSubview:lblFormato];
}
I think that you want to create labels with flexible height (not all have the same size), and must fix the width of formatosImageView.
EDITED FOR iOS7
I was using sizeWithFont that is deprecated in iOS7, I changed it for boundingRectWithSize
Try this:
UILabel *lblFormato = [[UILabel alloc] init];
lblFormato.numberOfLines = 0;
lblFormato.lineBreakMode = NSLineBreakByWordWrapping;
[lblFormato sizeToFit];
NSString *string = [NSString stringWithFormat:#"- %#", tipoVino];
[lblFormato setText: string];
//Calculate the size of the container of the lblFormato
CGSize size = [string boundingRectWithSize:CGSizeMake(widthImageFormatos, 2000) options:NSStringDrawingUsesLineFragmentOrigin attributes:#{NSFontAttributeName: [UIFont fontWithName:#"customFont" size:fontSize]} context:nil];
lblFormato.frame = CGRectMake(labelX, labelY + 25, size.width, size.height);
and you must update the labelY with:
labelY = lblFormato.frame.size.height;
Maybe it helps you.
With regards #spinillos answer, for iOS 7:
NSDictionary *attributes = #{ NSFontAttributeName : [UIFont systemFontOfSize:<#fontSize#>] };
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]
initWithString: <#string#>,
attributes:attributes];
CGRect frame = [attributedString boundingRectWithSize:CGSizeMake(<#width#>, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil];
I'm trying to use the attributed string API of iOS 6 to calculate the size of text and shrink the font size if necessary. However, I can't get it to work as the documentation says.
NSString *string = #"This is a long text that doesn't shrink as it should";
NSStringDrawingContext *context = [NSStringDrawingContext new];
context.minimumScaleFactor = 0.5;
UIFont *font = [UIFont fontWithName:#"SourceSansPro-Bold" size:32.f];
NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.lineBreakMode = NSLineBreakByClipping;
NSDictionary *attributes = #{ NSFontAttributeName: font,
NSParagraphStyleAttributeName: paragraphStyle };
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:self.title attributes:attributes];
CGRect rect = [attributedString boundingRectWithSize:CGSizeMake(512.f, 512.f) options:NSStringDrawingUsesLineFragmentOrigin context:context];
NSLog(#"rect: %#, context: %#", NSStringFromCGRect(rect), context.debugDescription);
But the text doesn't shrink and is truncated. actualScaleFactor is always 1. The log results are:
rect:{{0, 0}, {431.64801, 80.447998}}, context:<NSStringDrawingContext: 0x14e85770> minimumScaleFactor:0.500000 minimumTrackingAdjustment:0.000000 actualScaleFactor:1.000000 actualTrackingAdjustment:0.000000 totalBounds:{{0, 0}, {431.64801, 80.447998}}
The result is the same if I use the actual drawing method and not the measuring method. If I remove the paragraph style, it makes the text wrap and doesn't shrink it. If I remove the paragraph style AND I choose a size that only allows one line of text, the text is truncated too instead of being shrunk. What is wrong? There is very little documentation or online resources dealing with NSStringDrawingContext. And I'm trying to avoid the use of sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode: which is deprecated in iOS 7.
NSStringDrawingContext's minimumScaleFactor appears to be broken in iOS 7.
As far as I can make out, even in iOS 6, it didn't work for drawing; it worked for measuring, so you could work out what would happen in a context where it does work for drawing, like a UILabel. That way, you know the correct minimum height for the label.
Or, you could use the resulting scale factor to shrink the text yourself, in the knowledge that now it will fit.
Example:
- (void)drawRect:(CGRect)rect
{
// rect is 0,0,210,31
NSMutableAttributedString* s =
[[NSMutableAttributedString alloc] initWithString: #"This is the army Mister Jones."];
[s addAttributes:#{NSFontAttributeName:[UIFont fontWithName:#"GillSans" size:20]}
range:NSMakeRange(0,s.length)];
NSMutableParagraphStyle* para = [[NSMutableParagraphStyle alloc] init];
para.lineBreakMode = NSLineBreakByTruncatingTail;
[s addAttributes:#{NSParagraphStyleAttributeName:para}
range:NSMakeRange(0,s.length)];
NSStringDrawingContext* con = [[NSStringDrawingContext alloc] init];
con.minimumScaleFactor = 0.5;
CGRect result =
[s boundingRectWithSize:rect.size
options:NSStringDrawingUsesLineFragmentOrigin context:con];
CGFloat scale = con.actualScaleFactor;
// ...(could have a check here to see if result fits in target rect)...
// fix font to use scale factor, and draw
[s addAttributes:#{NSFontAttributeName:[UIFont fontWithName:#"GillSans" size:20*scale]}
range:NSMakeRange(0,s.length)];
[s drawWithRect:rect options:NSStringDrawingUsesLineFragmentOrigin context:nil];
}
In iOS 6, scale is about 0.85 and you can use it as shown to shrink the text. But in iOS 7, scale remains at 1, suggesting that no shrinkage is happening and this feature of NSStringDrawingContext is now useless. I can't tell whether that's a bug or whether the feature has been deliberately abandoned.
After googling for a long time I did not find a solution working under iOS7. Right now I use the following workaround, knowing that it is very ugly. I render a UILabel in memory, take a screenshot and draw that. UILabel is able to shrink the text correctly.
But perhaps someone finds it useful.
UILabel *myLabel = [[UILabel alloc] initWithFrame:myLabelFrame];
myLabel.font = [UIFont fontWithName:#"HelveticaNeue-BoldItalic" size:16];
myLabel.text = #"Some text that is too long";
myLabel.minimumScaleFactor = 0.5;
myLabel.adjustsFontSizeToFitWidth = YES;
myLabel.backgroundColor = [UIColor clearColor];
UIGraphicsBeginImageContextWithOptions(myLabelFrame.size, NO, 0.0f);
[[myLabel layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[screenshot drawInRect:myLabel.frame];
Just wanted to post this solution as I have been battling with this for a couple hours. I could never get the text area to scale down and would always have the last lines of text cut off.
The solution for me was to not add a context and just set it to nil. I got this when looking at the example on this site. https://littlebitesofcocoa.com/144-drawing-multiline-strings
Note after getting the size the box would draw at using
pageStringSize = [myString boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrsDictionary context:nil];
I still needed to loop through scaling down the font manually:
while (pageStringSize.size.height > 140 && scale > 0.5) {
scale = scale - 0.1;
font = [UIFont fontWithName:#"Chalkboard SE" size:24.0 *scale];
attrsDictionary = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName,[NSNumber numberWithFloat:1.0], NSBaselineOffsetAttributeName, nil];
pageStringSize = [myString boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrsDictionary context:nil];
}
The picture is: http://www.flickr.com/photos/71607441#N07/6641626163/
The background is a UIImageView, and the blue part I want to show as "title" of the image.
I used UILabel, but the length of the text is dynamic. It can be one line or two line, at most two line. If the text is longer than two lines, it will be truncated.
The blue part looks like "highlight in Microsoft Word", but it is not "highlight in iOS UILabel.text"
Is there anyone can help me?
Try this code :----
CGSize maximumSize = CGSizeMake(320, 30);
UILabel *newsLabel = [[UILabel alloc] init];
newsLabel.textColor = [UIColor whiteColor];
newsLabel.font = [UIFont boldSystemFontOfSize:11];
newsLabel.backgroundColor = [UIColor clearColor];
newsLabel.lineBreakMode = UILineBreakModeWordWrap;
newsLabel.numberOfLines = 0;
lineBreakMode:newsLabel.lineBreakMode];
CGSize dateStringSize = [#"Text Input" sizeWithFont:newsLabel.font
constrainedToSize:maximumSize
lineBreakMode:newsLabel.lineBreakMode];
CGRect dateFrame = CGRectMake(5, 5, 320, dateStringSize.height); //breath can be any desired float value
newsLabel.text = #"Text Input";
newsLabel.textAlignment = UITextAlignmentCenter;
newsLabel.frame = dateFrame;
You can find the size in pixels required for your title using:
CGSize size = [UILabel.text sizeWithFont:yourFont];
there's also:
CGSize size = [UILabel.text sizeWithFont:yourFont lineBreakMode: yourLineBreakMode];
You could then use these dimensions (size.width, size.height) to set the frame of your UILabel.
Hope this helps. :)
I want to display an image next to a UILabel, however UILabel has variable text length, so I don't know where to place the image. How can I accomplish this?
CGSize expectedLabelSize = [yourString sizeWithFont:yourLabel.font
constrainedToSize:maximumLabelSize
lineBreakMode:yourLabel.lineBreakMode];
What is -[NSString sizeWithFont:forWidth:lineBreakMode:] good for?
this question might have your answer, it worked for me.
For 2014, I edited in this new version, based on the ultra-handy comment by Norbert below! This does everything.
// yourLabel is your UILabel.
float widthIs =
[self.yourLabel.text
boundingRectWithSize:self.yourLabel.frame.size
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{ NSFontAttributeName:self.yourLabel.font }
context:nil]
.size.width;
NSLog(#"the width of yourLabel is %f", widthIs);
yourLabel.intrinsicContentSize.width for Objective-C / Swift
In swift
yourLabel.intrinsicContentSize().width
The selected answer is correct for iOS 6 and below.
In iOS 7, sizeWithFont:constrainedToSize:lineBreakMode: has been deprecated. It is now recommended you use boundingRectWithSize:options:attributes:context:.
CGRect expectedLabelSize = [yourString boundingRectWithSize:sizeOfRect
options:<NSStringDrawingOptions>
attributes:#{
NSFontAttributeName: yourString.font
AnyOtherAttributes: valuesForAttributes
}
context:(NSStringDrawingContext *)];
Note that the return value is a CGRect not a CGSize. Hopefully that'll be of some assistance to people using it in iOS 7.
Swift 4 Answer who are using Constraint
label.text = "Hello World"
var rect: CGRect = label.frame //get frame of label
rect.size = (label.text?.size(attributes: [NSFontAttributeName: UIFont(name: label.font.fontName , size: label.font.pointSize)!]))! //Calculate as per label font
labelWidth.constant = rect.width // set width to Constraint outlet
Swift 5 Answer who are using Constraint
label.text = "Hello World"
var rect: CGRect = label.frame //get frame of label
rect.size = (label.text?.size(withAttributes: [NSAttributedString.Key.font: UIFont(name: label.font.fontName , size: label.font.pointSize)!]))! //Calculate as per label font
labelWidth.constant = rect.width // set width to Constraint outlet
In iOS8 sizeWithFont has been deprecated, please refer to
CGSize yourLabelSize = [yourLabel.text sizeWithAttributes:#{NSFontAttributeName : [UIFont fontWithName:yourLabel.font size:yourLabel.fontSize]}];
You can add all the attributes you want in sizeWithAttributes.
Other attributes you can set:
- NSForegroundColorAttributeName
- NSParagraphStyleAttributeName
- NSBackgroundColorAttributeName
- NSShadowAttributeName
and so on. But probably you won't need the others
CGRect rect = label.frame;
rect.size = [label.text sizeWithAttributes:#{NSFontAttributeName : [UIFont fontWithName:label.font.fontName size:label.font.pointSize]}];
label.frame = rect;
Here's something I came up with after applying a few principles other SO posts, including Aaron's link:
AnnotationPin *myAnnotation = (AnnotationPin *)annotation;
self = [super initWithAnnotation:myAnnotation reuseIdentifier:reuseIdentifier];
self.backgroundColor = [UIColor greenColor];
self.frame = CGRectMake(0,0,30,30);
imageView = [[UIImageView alloc] initWithImage:myAnnotation.THEIMAGE];
imageView.frame = CGRectMake(3,3,20,20);
imageView.layer.masksToBounds = NO;
[self addSubview:imageView];
[imageView release];
CGSize titleSize = [myAnnotation.THETEXT sizeWithFont:[UIFont systemFontOfSize:12]];
CGRect newFrame = self.frame;
newFrame.size.height = titleSize.height + 12;
newFrame.size.width = titleSize.width + 32;
self.frame = newFrame;
self.layer.borderColor = [UIColor colorWithRed:0 green:.3 blue:0 alpha:1.0f].CGColor;
self.layer.borderWidth = 3.0;
UILabel *infoLabel = [[UILabel alloc] initWithFrame:CGRectMake(26,5,newFrame.size.width-32,newFrame.size.height-12)];
infoLabel.text = myAnnotation.title;
infoLabel.backgroundColor = [UIColor clearColor];
infoLabel.textColor = [UIColor blackColor];
infoLabel.textAlignment = UITextAlignmentCenter;
infoLabel.font = [UIFont systemFontOfSize:12];
[self addSubview:infoLabel];
[infoLabel release];
In this example, I'm adding a custom pin to a MKAnnotation class that resizes a UILabel according to the text size. It also adds an image on the left side of the view, so you see some of the code managing the proper spacing to handle the image and padding.
The key is to use CGSize titleSize = [myAnnotation.THETEXT sizeWithFont:[UIFont systemFontOfSize:12]]; and then redefine the view's dimensions. You can apply this logic to any view.
Although Aaron's answer works for some, it didn't work for me. This is a far more detailed explanation that you should try immediately before going anywhere else if you want a more dynamic view with an image and resizable UILabel. I already did all the work for you!!