iOS判斷當(dāng)前點(diǎn)擊的位置是否在某個視圖上

記錄幾種判斷觸摸點(diǎn)是否在某個view上面的方法

• 第一種方式：isDescendantOfView:

  通過touch.view調(diào)用 isDescendantOfView: 方法，返回 YES, 則觸摸點(diǎn)在我們需要判斷的視圖上；反之則不在。

  - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
  
      UITouch *touch = [touches.allObjects lastObject];
      BOOL result = [touch.view isDescendantOfView:self.blueView];
      NSLog(@"%@點(diǎn)擊在藍(lán)色視圖上", result ? @"是" : @"不是");
  }
  
  

• 第二種方式：locationInView: 和 containsPoint 結(jié)合使用

  - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
  
      UITouch *touch = [touches.allObjects lastObject];
      CGPoint point = [touch locationInView:self.blueView];
      BOOL result = [self.blueView.layer containsPoint:point];
      NSLog(@"%@點(diǎn)擊在藍(lán)色視圖上", result ? @"是" : @"不是");
  }
  

• 第三種方式：locationInView: 和 CGRectContainsPoint 結(jié)合使用

  locationView 如果傳入的是需要判斷視圖(self.blueView)的父視圖，CGRectContainsPoint則需要傳入需要判斷視圖(self.blueView)的frame，否則傳入 bounds.

  - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {   
  
      UITouch *touch = [touches.allObjects lastObject];
      CGPoint point = [touch locationInView:self.blueView];
      BOOL result = CGRectContainsPoint(self.blueView.bounds, point);
      NSLog(@"這次%@點(diǎn)擊在藍(lán)色視圖上", result ? @"是" : @"不是");
  }
  

• 第四種方式：坐標(biāo)轉(zhuǎn)換convertPoint:fromLayer: 再判斷是否是在該視圖范圍內(nèi) containsPoint:

  - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {   
  
      CGPoint point = [[touches anyObject] locationInView:self.view];
      point = [self.blueView.layer convertPoint:point fromLayer:self.view.layer];
      BOOL result = [self.blueView.layer containsPoint:point];
      NSLog(@"%@點(diǎn)擊在藍(lán)色視圖上", result ? @"是" : @"不是");
  }