Comment puis-je ajouter un saut de ligne pour le texte d'un UIButton?

Question

Je veux savoir comment avoir une étiquette multiligne sur un UIButton.

Answer 1

Utilisez TitleLabel de la UIButton, titleLabel.numberOfLines spécifiquement la propriété:

titleLabel 
A view that displays the value of the currentTitle property for a button. (read-only) 

@property(nonatomic,readonly,retain) UILabel *titleLabel 
Discussion 
Although this property is read-only, its own properties are read/write. Use these 
properties to configure the appearance of the button label. For example: 

UIButton *button     = [UIButton buttonWithType: UIButtonTypeRoundedRect]; 
button.titleLabel.font   = [UIFont systemFontOfSize: 12]; 
button.titleLabel.lineBreakMode = UILineBreakModeTailTruncation; 
button.titleLabel.shadowOffset = CGSizeMake (1.0, 0.0); 
The titleLabel property returns a value even if the button has not been displayed yet. 
The value of the property is nil for system buttons.