@interface UIView : UIResponder

- (id)initWithFrame:(CGRect)frame;

// YES:能夠跟用戶進行交互

@PRoperty(nonatomic,getter=isUserInteractionEnabled) BOOLuserInteractionEnabled;  // default is YES

// 控件的一個標記(父控件可以通過tag找到對應的子控件)

@property(nonatomic)                                 NSInteger tag;                // default is 0

// 圖層(可以用來設置圓角效果/陰影效果)

@property(nonatomic,readonly,retain)                 CALayer *layer;

@end

@interface UIView(UIViewGeometry)

// 位置和尺寸(以父控件的左上角為坐標原點(0, 0))

@property(nonatomic) CGRect            frame;

// 位置和尺寸(以自己的左上角為坐標原點(0, 0))

@property(nonatomic) CGRect            bounds;

// 中點(以父控件的左上角為坐標原點(0, 0))

@property(nonatomic) CGPoint           center;      

// 形變屬性(平移/縮放/旋轉)

@property(nonatomic) CGAffineTransform transform;   // default is CGAffineTransformIdentity

// YES:支持多點觸摸

@property(nonatomic,getter=isMultipleTouchEnabled) BOOLmultipleTouchEnabled;   // default is NO

@end

@interface UIView(UIViewHierarchy)

// 父控件

@property(nonatomic,readonly) UIView       *superview;

// 子控件(新添加的控件默認都在subviews數組的后面, 新添加的控件默認都顯示在最上面/最頂部)

@property(nonatomic,readonly,copy) NSArray *subviews;

// 獲得當前控件所在的window

@property(nonatomic,readonly) UIWindow     *window;

// 從父控件中移除一個控件

- (void)removeFromSuperview;

// 添加一個子控件(可以將子控件插入到subviews數組中index這個位置)

- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;

// 交換subviews數組中所存放子控件的位置

- (void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;

// 添加一個子控件(新添加的控件默認都在subviews數組的后面, 新添加的控件默認都顯示在最上面/最頂部)

- (void)addSubview:(UIView *)view;

// 添加一個子控件view(被擋在siblingSubview的下面)

- (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;

// 添加一個子控件view(蓋在siblingSubview的上面)

- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;

// 將某個子控件拉到最上面(最頂部)來顯示

- (void)bringSubviewToFront:(UIView *)view;

// 將某個子控件拉到最下面(最底部)來顯示

- (void)sendSubviewToBack:(UIView *)view;

- (void)didAddSubview:(UIView *)subview;

- (void)willRemoveSubview:(UIView *)subview;

- (void)willMoveToSuperview:(UIView *)newSuperview;

- (void)didMoveToSuperview;

- (void)willMoveToWindow:(UIWindow *)newWindow;

- (void)didMoveToWindow;

// 是不是view的子控件或者子控件的子控件(是否為view的后代)

- (BOOL)isDescendantOfView:(UIView *)view;  // returns YES for self.

// 通過tag獲得對應的子控件(也可以或者子控件的子控件)

- (UIView *)viewWithTag:(NSInteger)tag;     // recursive search. includes self

// 控件的frame發生改變的時候就會調用,一般在這里重寫布局子控件的位置和尺寸

// 重寫了這個寫方法后,一定調用[super layoutSubviews];

- (void)layoutSubviews;

@end

@interface UIView(UIViewRendering)

// YES : 超出控件邊框范圍的內容都剪掉

@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 : 隱藏  NO : 顯示

@property(nonatomic,getter=isHidden) BOOL              hidden;

// 內容模式

@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 (^)(BOOLfinished))completion;

+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOLfinished))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 (^)(BOOLfinished))completion;

@end