iOS Enabled 和 UserInteractionEna

NS_CLASS_AVAILABLE_IOS(2_0) @interface UIControl : UIView
@property(nonatomic,getter=isEnabled) BOOL enabled;                                 
 // default is YES. if NO, ignores touch events and subclasses may draw differently

Enabled 是UIControl的属性，父类是UIView，这个属性会对控件的视觉有影响 ，当为NO时 控件默认显示灰色，触摸事件会被忽略,通常是禁用控制的首选

NS_CLASS_AVAILABLE_IOS(2_0) @interface UIView : UIResponder
@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;  
// default is YES. if set to NO, user events (touch, keys) are ignored and removed from the event queue.

UserInteractionEnabled是UIView的属性，父类是UIResponder，触摸事件会被忽略并且会从响应链(响应队列)中移除

总结：如果控件有enabled 属性那就优先使用，因为它更直观，没有在使用UserInteractionEnabled