Label.textAlignment = 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

IO6.1 [lblTitle setTextAlignment NSTextAlignmentCenter):;

对于Swift 3，它是:

label.textAlignment = .center

在xamarin ios 假设您的标签名称是title，然后执行以下操作

title.TextAlignment = UITextAlignment.Center;

Label.textAlignment = NSTextAlignmentCenter;