UItextView在屏幕上移动时获取放大镜位置

Question

我有一个不包含任何文本的UITextView。当我长按这个视图时，放大镜就会出现在屏幕上，我可以用放大镜移动手指。问题是:当我移动放大镜时，有没有办法捕捉手指的动作来获得放大镜的位置？

谢谢,

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Answer 1

我们可以使用触摸方法来做到这一点。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
   NSLog(@"touchesBegan");
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
  [super touchesBegan:touches withEvent:event];
  NSLog(@"touchesMoved");
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
   NSLog(@"****touchesEnded");
   [self.nextResponder touchesEnded: touches withEvent:event];  
   NSLog(@"****touchesEnded");
   [super touchesEnded:touches withEvent:event];
   NSLog(@"****touchesEnded");
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
    [super touches... etc]; 
    NSLog(@"touchesCancelled");
}