How to add line break for UILabel?

Let see that I have a string look like this:

NSString *longStr = @"AAAAAnBBBBBnCCCCC";  

How do I make it so that the UILabel display the message like this

AAAAA
BBBBB
CCCCC

I don't think n is recognized by UILabel, so is there anything that I can put inside NSString so that UILabel knows that it has to create a line break there?

---

Use n as you are using in your string.

Set numberOfLines to 0 to allow for any number of lines.

label.numberOfLines = 0;

Update the label frame to match the size of the text using sizeWithFont: . If you don't do this your text will be vertically centered or cut off.

UILabel *label; // set frame to largest size you want
...
CGSize labelSize = [label.text sizeWithFont:label.font
                          constrainedToSize:label.frame.size
                              lineBreakMode:label.lineBreakMode];
label.frame = CGRectMake(
    label.frame.origin.x, label.frame.origin.y, 
    label.frame.size.width, labelSize.height);

Update : Replacement for deprecated

sizeWithFont:constrainedToSize:lineBreakMode:

Reference, Replacement for deprecated sizeWithFont: in iOS 7?

CGSize labelSize = [label.text sizeWithAttributes:@{NSFontAttributeName:label.font}];

label.frame = CGRectMake(
    label.frame.origin.x, label.frame.origin.y, 
    label.frame.size.width, labelSize.height);

---

Use option-return when typing in the little box in Interface Builder to insert a line feed (n). In Interface Builder's Label attributes, set # Lines = 0.

Select the label and then change Lines property to 0 like in the above image, and then use n in your string for line break.

---

If you read a string from an XML file, the line break n in this string will not work in UILabel text. The n is not parsed to a line break.

Here is a little trick to solve this issue:

// correct next line n in string from XML file
NSString *myNewLineStr = @"n";
myLabelText = [myLabelText stringByReplacingOccurrencesOfString:@"n" withString:myNewLineStr];

myLabel.text = myLabelText;

So you have to replace the unparsed n part in your string by a parsed n in a hardcoded NSString .

Here are my other label settings:

myLabel.numberOfLines = 0;
myLabel.backgroundColor = [UIColor lightGrayColor];
myLabel.textColor = [UIColor redColor]; 
myLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:14.0];   
myLabel.textAlignment = UITextAlignmentCenter;

Most important is to set numberOfLines to 0 (= unlimited number of lines in label).

No idea why Apple has chosen to not parse n in strings read from XML?

Hope this helps.

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