Question

我正在讨论我的UIView。在某些情况下我想要取消触摸，以便touchesEnded不会被调用。但无论触及什么触点总是会被称为？

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
   if (SOMETHING_SPECIAL)
   {
      [super touchesCancelled:touches withEvent:event];
   }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
   //I don't want it to get here if touches were canceled how can i do this?
}

- 在我的触摸中，我如何确定触摸是否被取消？

Answer 1

TouchesEnded将总是在您取消或未被取消的任何地方被调用，所以我建议改为：

   if (SOMETHING_SPECIAL)
   {

   }

在你的：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

Answer 2

要获取touchesCancelled事件，请从UIResponder实现此方法。

touchesCancelled:withEvent:

iPhone - 检测触摸并取消它们？

2 个答案: