Question

我在视图中添加了两个手势识别器。一个将处理视图拖动，另一个将处理双击。像

这样的东西

UITapGestureRecognizer *doubleTap =
  [[UITapGestureRecognizer alloc] initWithTarget:self 
        action:@selector(deleteThisView)];
[doubleTap setDelegate:self];
[doubleTap setCancelsTouchesInView:YES];
[doubleTap setNumberOfTapsRequired:1];
[base addGestureRecognizer:doubleTap];
[doubleTap release];

UIPanGestureRecognizer *panGesture = nil;
panGesture = [[UIPanGestureRecognizer alloc] 
                  initWithTarget:self action:@selector(drag:)];
[panGesture setMaximumNumberOfTouches:1];
[panGesture setDelegate:self];
[base addGestureRecognizer:panGesture];
[panGesture release];

问题在于：由于视图可以移动，双击很难获得，因为视图可以将一根头发滑向一侧或另一侧，iOS不会将其识别为双击，而是会看到它作为两个动作，拖动方法将运行两次。

我没有看到如何做到这一点。有线索吗？

感谢

Answer 1

有一个委托方法可以告诉中央手势代码两个识别器可能同时进行：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    if (gestureRecognizer==_panRecognizer && otherGestureRecognizer==_swipeRecognizer)
        return YES;
    if (gestureRecognizer==_swipeRecognizer && otherGestureRecognizer==_panRecognizer)
        return YES;
    return NO;
}

也许你可以尝试类似的东西。

Answer 2

这是Vagrant在swift中的回答：

"test1",2,2,,0,"Sun,day",Jan
"be,st3",1,0,,0,"Sunday",Feb1
"nest",0,0,,0,"Sunday",Jul
"rest,5",,,,0,"Sunday",Aug

不要忘记实施委托协议并将手势的代表设置为自己（我最初忘记了这一点）。

iPhone - 手势识别器互相争斗

2 个答案: