UIView的一些常用属性和方法

1. UIView的属性

　　UIView继承自UIResponder,拥有touches方法。

- (instancetype)initWithFrame:(CGRect)frame; 通过Frame来初始化一个UIView控件
@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled; 默认为YES 能够跟用户进行交互
@property(nonatomic)NSInteger tag; 控件的一个标记(父控件可以通过tag找到对应的子控件) 默认为 0
@property(nonatomic,readonly,strong) CALayer *layer; 图层(可以用来设置圆角效果\阴影效果)

　　@interface UIView(UIViewGeometry)

@property(nonatomic) CGRect frame; 位置和尺寸(以父控件的左上角为坐标原点(0, 0))
@property(nonatomic) CGRect bounds; 位置和尺寸(以自己的左上角为坐标原点(0, 0)
@property(nonatomic) CGPoint center; 中点(以父控件的左上角为坐标原点(0, 0))
@property(nonatomic) CGAffineTransform transform; default is CGAffineTransformIdentity 形变属性(平移\缩放\旋转)
@property(nonatomic,getter=isMultipleTouchEnabled) BOOL multipleTouchEnabled; // default is NO // YES:支持多点触摸

　　@interface UIView(UIViewHierarchy)

@property(nonatomic,readonly) UIView *superview; // 父控件
@property(nonatomic,readonly,copy) NSArray *subviews; // 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) UIWindow *window; // 获得当前控件所在的window
- (void)removeFromSuperview; // 从父控件中移除一个控件
- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index; // 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)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2; // 交换subviews数组中所存放子控件的位置
- (void)addSubview:(UIView *)view; // 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)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview; // 添加一个子控件view(被挡在siblingSubview的下面)
- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview ; // 添加一个子控件view(盖在siblingSubview的上面)
- (void)bringSubviewToFront:(UIView *)view; // 将某个子控件拉到最上面(最顶部)来显示
- (void)sendSubviewToBack:(UIView *)view; // 将某个子控件拉到最下面(最底部)来显示
- (BOOL)isDescendantOfView:(UIView *)view; // returns YES for self. // 是不是view的子控件或者子控件的子控件(是否为view的后代)
- (UIView *)viewWithTag:(NSInteger)tag; // recursive search. includes self // 通过tag获得对应的子控件(也可以或者子控件的子控件)
/**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**/
/**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;

@interface UIView(UIViewRendering)

@property(nonatomic) BOOL clipsToBounds; // YES : 超出控件边框范围的内容都剪掉
@property(nonatomic,copy) UIColor *backgroundColor; // default is nil // 背景色
@property(nonatomic) CGFloat alpha; // default is 1.0 // 透明度(0.0~1.0)
@property(nonatomic,getter=isOpaque) BOOL opaque; // default is YES // YES:不透明 NO:透明
@property(nonatomic,getter=isHidden) BOOL hidden; // YES : 隐藏 NO : 显示
@property(nonatomic) UIViewContentMode contentMode; // default is UIViewContentModeScaleToFill // 内容模式

设置属性改变时的动画

@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;