Dynamically getting height of UILabel according to Text return different Value for iOS 7.0 and iOS 6.1
I am using the this method for getting the height of the UILabel Dynamically:
+(CGSize) GetSizeOfLabelForGivenText:(UILabel*)label Font:(UIFont*)fontForLabel Size: (CGSize)LabelSize{
label.numberOfLines = 0;
CGSize labelSize = [label.text sizeWithFont:fontForLabel constrainedToSize:LabelSize lineBreakMode:NSLineBreakByCharWrapping];
return (labelSize);
}
With this solution I am getting the exact size of UILabel if my code is running on below iOS 8 but if I run my application on iOS7 then it is returns a different value.
Solution 1:
You have to dynamically set the frame, like below:
Tested on iOS 6 to iOS 12.2
Swift:
let constrainedSize = CGSize(width: self.titleLable.frame.size.width, height:9999)
let attributesDictionary = [NSAttributedString.Key.font: UIFont.init(name: "HelveticaNeue", size: 11.0)]
let string = NSAttributedString.init(string: "textToShow", attributes: attributesDictionary as [NSAttributedString.Key : Any])
var requiredHeight = string.boundingRect(with: constrainedSize, options: .usesLineFragmentOrigin, context: nil)
if (requiredHeight.size.width > self.titleLable.frame.size.width) {
requiredHeight = CGRect(x: 0, y: 0, width: self.titleLable.frame.size.width, height: requiredHeight.size.height)
}
var newFrame = self.titleLable.frame
newFrame.size.height = requiredHeight.size.height
self.titleLable.frame = newFrame
Objective C:
CGSize constrainedSize = CGSizeMake(self.resizableLable.frame.size.width , 9999);
NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
[UIFont fontWithName:@"HelveticaNeue" size:11.0], NSFontAttributeName,
nil];
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"textToShow" attributes:attributesDictionary];
CGRect requiredHeight = [string boundingRectWithSize:constrainedSize options:NSStringDrawingUsesLineFragmentOrigin context:nil];
if (requiredHeight.size.width > self.resizableLable.frame.size.width) {
requiredHeight = CGRectMake(0,0, self.resizableLable.frame.size.width, requiredHeight.size.height);
}
CGRect newFrame = self.resizableLable.frame;
newFrame.size.height = requiredHeight.size.height;
self.resizableLable.frame = newFrame;
Solution 2:
Here's a total solution for width and height. Put these in your AppDelegate:
+(void)fixHeightOfThisLabel:(UILabel *)aLabel
{
aLabel.frame = CGRectMake(aLabel.frame.origin.x,
aLabel.frame.origin.y,
aLabel.frame.size.width,
[AppDelegate heightOfTextForString:aLabel.text
andFont:aLabel.font
maxSize:CGSizeMake(aLabel.frame.size.width, MAXFLOAT)]);
}
+(CGFloat)heightOfTextForString:(NSString *)aString andFont:(UIFont *)aFont maxSize:(CGSize)aSize
{
// iOS7
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
CGSize sizeOfText = [aString boundingRectWithSize: aSize
options: (NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
attributes: [NSDictionary dictionaryWithObject:aFont
forKey:NSFontAttributeName]
context: nil].size;
return ceilf(sizeOfText.height);
}
// iOS6
CGSize textSize = [aString sizeWithFont:aFont
constrainedToSize:aSize
lineBreakMode:NSLineBreakByWordWrapping];
return ceilf(textSize.height;
}
+(void)fixWidthOfThisLabel:(UILabel *)aLabel
{
aLabel.frame = CGRectMake(aLabel.frame.origin.x,
aLabel.frame.origin.y,
[AppDelegate widthOfTextForString:aLabel.text
andFont:aLabel.font
maxSize:CGSizeMake(MAXFLOAT, aLabel.frame.size.height)],
aLabel.frame.size.height);
}
+(CGFloat)widthOfTextForString:(NSString *)aString andFont:(UIFont *)aFont maxSize:(CGSize)aSize
{
// iOS7
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
CGSize sizeOfText = [aString boundingRectWithSize: aSize
options: (NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
attributes: [NSDictionary dictionaryWithObject:aFont
forKey:NSFontAttributeName]
context: nil].size;
return ceilf(sizeOfText.width);
}
// iOS6
CGSize textSize = [aString sizeWithFont:aFont
constrainedToSize:aSize
lineBreakMode:NSLineBreakByWordWrapping];
return ceilf(textSize.width);
}
then to use this, set the label's text:
label.numberOfLines = 0;
label.text = @"Everyone loves Stack OverFlow";
and call:
[AppDelegate fixHeightOfThisLabel:label];
Note: label's numberOfLines has to be set to 0. Hope that helps.