問題描述
UILabel 中的多行文本 (Multiple lines of text in UILabel)
Is there a way to have multiple lines of text in UILabel like in the UITextView or should I use the second one instead?
參考解法
方法 1:
Set the line break mode to word-wrapping and the number of lines to 0:
// Swift
textLabel.lineBreakMode = .byWordWrapping
textLabel.numberOfLines = 0
// Objective-C
textLabel.lineBreakMode = NSLineBreakByWordWrapping;
textLabel.numberOfLines = 0;
// C# (Xamarin.iOS)
textLabel.LineBreakMode = UILineBreakMode.WordWrap;
textLabel.Lines = 0;
Restored old answer (for reference and devs willing to support iOS below 6.0):
textLabel.lineBreakMode = UILineBreakModeWordWrap;
textLabel.numberOfLines = 0;
On the side: both enum values yield to 0 anyway.
方法 2:
In IB, set number of lines to 0 (allows unlimited lines)
When typing within the text field using IB, use "alt-return" to insert a return and go to the next line (or you can copy in text already separated out by lines).
方法 3:
The best solution I have found (to an otherwise frustrating problem that should have been solved in the framework) is similar to vaychick's.
Just set number of lines to 0 in either IB or code
myLabel.numberOfLines = 0;
This will display the lines needed but will reposition the label so its centered horizontally (so that a 1 line and 3 line label are aligned in their horizontal position). To fix that add:
CGRect currentFrame = myLabel.frame;
CGSize max = CGSizeMake(myLabel.frame.size.width, 500);
CGSize expected = [myString sizeWithFont:myLabel.font constrainedToSize:max lineBreakMode:myLabel.lineBreakMode];
currentFrame.size.height = expected.height;
myLabel.frame = currentFrame;
方法 4:
Use this to have multiple lines of text in UILabel:
textLabel.lineBreakMode = NSLineBreakByWordWrapping;
textLabel.numberOfLines = 0;
Swift:
textLabel.lineBreakMode = .byWordWrapping
textLabel.numberOfLines = 0
方法 5:
myUILabel.numberOfLines = 0;
myUILabel.text = @"your long string here";
[myUILabel sizeToFit];
(by Ilya Suzdalnitski、Ilya Suzdalnitski、Kendall Helmstetter Gelner、Michael Michailidis、Abi、Gurumoorthy Arumugam)