长按时启用 UIPanGestureRecognizer

问题描述

我想在 customView 执行 longPress 时在 customView 上启用 UIPanGestureRecognizer.
(我希望当你longPress customView时，customView会切换到移动模式"，你可以移动customView代码> 通过拖动.)

I'd like to enable UIPanGestureRecognizer on customView when the customView did longPress.
(I wish when you longPress customView, the customView will switch to "move mode", and you can move the customView by drag.)

但在这段代码中，只有 longPressAction: 被调用.panAction: 没有调用.
如何修复它以启用 PanAction:?

But in this code, only longPressAction: called. panAction: did not called.
How do I fix it to enable PanAction:?

- (void)viewDidLoad
{
    [self.view addSubview:customView];

    UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];
    [customView addGestureRecognizer:longPressRecognizer];
    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];
    [customView addGestureRecognizer:panRecognizer];
}

- (void)longPressAction:(UILongPressGestureRecognizer *)recognizer
{
    if ([recognizer state] == UIGestureRecognizerStateBegan) {
        CustomView *customView = (CustomView *)recognizer.view;
        customView.panRecongnizerEnabled = YES; //panRecongnizerEnabled is CustomView's property
    }
    if ([recognizer state] == UIGestureRecognizerStateEnded) {
        CustomView *customView = (CustomView *)recognizer.view;
        customView.panRecongnizerEnabled = NO;
    }
}

- (void)panAction:(UIPanGestureRecognizer *)recognizer
{
    CustomView *customView = (CustomView *)recognizer.view;
    if (customCell.panRecongnizerEnabled == NO) return;
    NSLog(@"running panAction");
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

推荐答案

您的 ViewController 需要符合 UIGestureRecognizerDelegate.我怀疑你要么已经这样做了 要么 否则 shouldRecognizeSimultaneouslyWithGestureRecognizer 没有任何意义.但是您绝对缺少的是将 gestureRecognizer 的委托设置为您的 viewController:

Your ViewController needs to conform to the UIGestureRecognizerDelegate. I suspect you either already did that or otherwise the shouldRecognizeSimultaneouslyWithGestureRecognizer would not make any sense. But what you are definitely missing is setting the gestureRecognizer´s delegate to your viewController:

longPressRecognizer.delegate = self;
panRecognizer.delegate = self;

现在您应该同时接收长按和平移.

Now you should be receiving both long press and pan simultaneous.

注意:我在没有任何 customView 的情况下进行了测试，只是将它们添加到 self.view 中.至少在那种情况下，上面的代码按预期工作.

Note: I tested without any customView, just added them to self.view. At least in that case, the code above worked as expected.

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