useful-extensions-ios:Swift中有用的iOS扩展的集合

Swift中的有用扩展 NSObject var appDelegate: UIApplicationDelegate { get } UIApplication public func setStatusBarBackgroundColor ( _ color : UIColor) UIImageView public func colored ( color : UIColor ? ) UISlider public func setThumbImage ( _ image : UIImage ? ) NSLayoutConstraint public func changeConstant ( _ constant : CGFloat) 字符串协议 public func index ( of string : Self , options : String .