对于Swift 3，它是:

label.textAlignment = .center

要在Swift的UILabel中居中文本(这是针对iOS 7+)，你可以做:

myUILabel.textAlignment = .Center

Or

myUILabel.textAlignment = NSTextAlignment.Center

Label.textAlignment = NSTextAlignmentCenter;

使用yourLabel。textAlignment = NSTextAlignmentCenter;为iOS >= 6.0和yourLabel。textAlignment = UITextAlignmentCenter;适用于iOS < 6.0。

IO6.1 [lblTitle setTextAlignment NSTextAlignmentCenter):;

从iOS 6及以后，UITextAlignment已弃用。使用NSTextAlignment

myLabel.textAlignment = NSTextAlignmentCenter;

Swift版本来自iOS 6及更高版本

myLabel.textAlignment = .center