第三十一篇：UIView常用属性与方法

@interface UIView : UIResponder<NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem>/** *  通过一个frame来初始化一个UI控件 */- (id)initWithFrame:(CGRect)frame;// YES:能够跟用户进行交互@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;  // default is YES// 控件的一个标记(父控件可以通过tag找到对应的子控件)@property(nonatomic)                                 NSInteger tag;                // default is 0// 图层(可以用来设置圆角效果\阴影效果)@property(nonatomic,readonly,retain)                 CALayer  *layer;@end@interface UIView(UIViewGeometry)// 位置和尺寸(以父控件的左上角为坐标原点(0, 0))@property(nonatomic) CGRect            frame;// 位置和尺寸(以自己的左上角为坐标原点(0, 0))@property(nonatomic) CGRect            bounds;// 中点(以父控件的左上角为坐标原点(0, 0))@property(nonatomic) CGPoint           center;      // 形变属性(平移\缩放\旋转)@property(nonatomic) CGAffineTransform transform;   // default is CGAffineTransformIdentity// YES:支持多点触摸@property(nonatomic,getter=isMultipleTouchEnabled) BOOL multipleTouchEnabled;   // default is NO@end@interface UIView(UIViewHierarchy)// 父控件@property(nonatomic,readonly) UIView       *superview;// 子控件(新添加的控件默认都在subviews数组的后面, 新添加的控件默认都显示在最上面\最顶部)@property(nonatomic,readonly,copy) NSArray *subviews;// 获得当前控件所在的window@property(nonatomic,readonly) UIWindow     *window;// 从父控件中移除一个控件- (void)removeFromSuperview;// 添加一个子控件(可以将子控件插入到subviews数组中index这个位置)- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;// 交换subviews数组中所存放子控件的位置- (void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;// 添加一个子控件(新添加的控件默认都在subviews数组的后面, 新添加的控件默认都显示在最上面\最顶部)- (void)addSubview:(UIView *)view;// 添加一个子控件view(被挡在siblingSubview的下面)- (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;// 添加一个子控件view(盖在siblingSubview的上面)- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;// 将某个子控件拉到最上面(最顶部)来显示- (void)bringSubviewToFront:(UIView *)view;// 将某个子控件拉到最下面(最底部)来显示- (void)sendSubviewToBack:(UIView *)view;/**系统自动调用(留给子类去实现)**/- (void)didAddSubview:(UIView *)subview;- (void)willRemoveSubview:(UIView *)subview;- (void)willMoveToSuperview:(UIView *)newSuperview;- (void)didMoveToSuperview;- (void)willMoveToWindow:(UIWindow *)newWindow;- (void)didMoveToWindow;/**系统自动调用**/// 是不是view的子控件或者子控件的子控件(是否为view的后代)- (BOOL)isDescendantOfView:(UIView *)view;  // returns YES for self.// 通过tag获得对应的子控件(也可以或者子控件的子控件)- (UIView *)viewWithTag:(NSInteger)tag;     // recursive search. includes self/**系统自动调用(留给子类去实现)**/// 控件的frame发生改变的时候就会调用,一般在这里重写布局子控件的位置和尺寸// 重写了这个写方法后,一定调用[super layoutSubviews];- (void)layoutSubviews;@end@interface UIView(UIViewRendering)// YES : 超出控件边框范围的内容都剪掉@property(nonatomic)                 BOOL              clipsToBounds;// 背景色@property(nonatomic,copy)            UIColor          *backgroundColor; // default is nil// 透明度(0.0~1.0)@property(nonatomic)                 CGFloat           alpha;                      // default is 1.0// YES:不透明  NO:透明@property(nonatomic,getter=isOpaque) BOOL              opaque;                     // default is YES// YES : 隐藏  NO : 显示@property(nonatomic,getter=isHidden) BOOL              hidden;// 内容模式@property(nonatomic)                 UIViewContentMode contentMode;                // default is UIViewContentModeScaleToFill@end@interface UIView(UIViewAnimationWithBlocks)+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion;+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion;+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations;+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion;@end