Creating flexible UILabel

Question

I got an app with some text data.

From TableView user choose one cell and then see UIViewController with relative text data. But information text could be from 1 line to N. How can create such UILabel, which will change size depending on size of text?

Answer 1

In the NSString UIKit Additions, you can find the following method:

- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(UILineBreakMode)lineBreakMode

with this one you can define the optimal height or width of your label. For example, to get the optimal height of a UILabel, you can create a category on UILabel with the following method:

- (float)optimalHeight
{
    return [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(self.frame.size.width, UINTMAX_MAX) lineBreakMode:self.lineBreakMode].height;
}

after that, you can simply change the frame of your UILabel. Don't forget to set the number of line of your label to 0.

Answer 2

Another solution would be to do this inside the code, with the sizeWithFont method. you can find more info here: iOS: UILabel dynamic height using sizeWithFont:constrainedToSize:lineBreakMode: not working

If it's the height that varies, you could set a maximum label size, with your standard label width and 9999 height, and then check what the suggested size would be for your text, using the font of your label