UIView之常用方法

UIView之常用方法

• 將一個視圖添加為子視圖，并使之在最上面顯示
  -(void)addSubView:(UIView *)view;
• 將指定子視圖移動到頂部
  -(void)bringSubViewToFront:(UIView *)view;
• 將指定之視圖放到最下面
  -(void)sendSubViewToBack:(UIView *)view;
• 將指定視圖添加到subviews數組的index位置
  -(void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
• 將指定視圖添加到指定子視圖下面
  -(void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;
• 將指定視圖添加到指定子視圖上面
  -(void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;
• 交換subviews數組中兩個位置的子視圖
  -(void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;
• 從父視圖中移除
  -(void)removeFromSuperview;
• 根據tag值獲取對應的子孫控件
  -(UIView *)viewWithTag:(NSInteger)tag;
• 將視圖中點從自己的坐標系轉換到指定的視圖坐標系中
  -(CGPoint)convertPoint:(CGPoint)point toView:(UIView *)view;
• 將指定視圖中坐標系內的某點轉換到自己的坐標系中
  -(CGPoint)convertPoint:(CGPoint)point fromView:(UIView *)view;
• 將視圖中矩形區域從自己的坐標系轉換到指定的視圖坐標系中
  -(CGRect)convertRect:(CGRect)rect toView:(UIView *)view;
• 將指定視圖中坐標系內的矩形區域轉換到自己的坐標系中
  -(CGRect)convertRect:(CGRect)rect fromView:(UIView *)view;
• 刷新視圖,調用后自動調用drawRect:(CGRect)rect
  -(void)setNeedsDisplay;

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• 繼承自UIResponder用于響應觸摸事件的方法

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;

以上方法需要自定義view重寫，若需要對觸摸點到判斷（使用）那么重寫方法時，在方法體內首先獲取觸摸點：

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

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• 動畫

1.// 首先需要設置動畫頭，告訴編譯器下面是動畫
2.[UIView beginAnimations:nil context:nil];
3.// 再設置動畫執行的配置、動畫
4.[UIView setAnimationDuration:0.5];
5.[UIView setAnimationRepeatCount:2];
6.[UIView setAnimationDelay:3.0];
7.// balabala需要執行的動畫
8.    ................
9.// 最后提交動畫
10.[UIView commitAnimations];

• 使用block設置動畫
  
  • 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