UIView之常用方法

UIView之常用方法

• 将一个视图添加为子视图，并使之在最上面显示
  -(void)addSubView:(UIView *)view;
• 将指定子视图移动到顶部
  -(void)bringSubViewToFront:(UIView *)view;
• 将指定之视图放到最下面
  -(void)sendSubViewToBack:(UIView *)view;
• 将指定视图添加到subviews数组的index位置
  -(void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
• 将指定视图添加到指定子视图下面
  -(void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;
• 将指定视图添加到指定子视图上面
  -(void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;
• 交换subviews数组中两个位置的子视图
  -(void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;
• 从父视图中移除
  -(void)removeFromSuperview;
• 根据tag值获取对应的子孙控件
  -(UIView *)viewWithTag:(NSInteger)tag;
• 将视图中点从自己的坐标系转换到指定的视图坐标系中
  -(CGPoint)convertPoint:(CGPoint)point toView:(UIView *)view;
• 将指定视图中坐标系内的某点转换到自己的坐标系中
  -(CGPoint)convertPoint:(CGPoint)point fromView:(UIView *)view;
• 将视图中矩形区域从自己的坐标系转换到指定的视图坐标系中
  -(CGRect)convertRect:(CGRect)rect toView:(UIView *)view;
• 将指定视图中坐标系内的矩形区域转换到自己的坐标系中
  -(CGRect)convertRect:(CGRect)rect fromView:(UIView *)view;
• 刷新视图,调用后自动调用drawRect:(CGRect)rect
  -(void)setNeedsDisplay;

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• 继承自UIResponder用于响应触摸事件的方法

1.- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;
2.- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;
3.- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;
4.- (void)touchesCancelled:(nullable NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;

以上方法需要自定义view重写，若需要对触摸点到判断（使用）那么重写方法时，在方法体内首先获取触摸点：

1.UITouch *touch = [touches anyObject];
2.CGPoint point = [touch locationInView:self];

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• 动画

1.// 首先需要设置动画头，告诉编译器下面是动画
2.[UIView beginAnimations:nil context:nil];
3.// 再设置动画执行的配置、动画
4.[UIView setAnimationDuration:0.5];
5.[UIView setAnimationRepeatCount:2];
6.[UIView setAnimationDelay:3.0];
7.// balabala需要执行的动画
8.    ................
9.// 最后提交动画
10.[UIView commitAnimations];

• 使用block设置动画
  • 方法一
    +(void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations;
  • 方法二
    +(void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion
  • 方法三
    + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion