Question

我是iPhone开发人员的新手，

我制作了epub阅读器，并在webview

中加载了epub的每一页

我想要的是，当用户right swipe gesture第二次然后我想要导航到新页面时，我不想在用户第一次right swipe gesture时做任何事情。

UISwipeGestureRecognizer *swipeRight

有没有类似的方法，

if(swipeRight.touch.count > 2)
{
  // do this
}

任何帮助都会得到满足。

提前致谢！

修改

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    float scrollViewHeight = scrollView.frame.size.height;
    float scrollContentSizeHeight = scrollView.contentSize.height;
    float scrollOffset = scrollView.contentOffset.y;

    if (scrollOffset == 0)
    {
        swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self  action:@selector(swipeLeftAction:)];
        swipeUp.direction = UISwipeGestureRecognizerDirectionUp;
        swipeUp.numberOfTouchesRequired=2;
        swipeUp.delegate = (id<UIGestureRecognizerDelegate>)self;
        swipeUp.cancelsTouchesInView=YES;
        [_webview addGestureRecognizer:swipeUp];  
    }
    else if (scrollOffset + scrollViewHeight == scrollContentSizeHeight)
    {
        swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self  action:@selector(swipeRightAction:)];
        swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
        swipeDown.numberOfTouchesRequired=2;
        swipeDown.delegate = (id<UIGestureRecognizerDelegate>)self;
        swipeDown.cancelsTouchesInView=YES;
        [_webview addGestureRecognizer:swipeDown];

    }

Answer 1

你可以告诉UIWebView的UIScrollView它的UIPanGestureRecognizer应该只在你自己的UISwipeGestureRecognizer失败时触发。

您就是这样做的：

UISwipeGestureRecognizer *rightSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
UISwipeGestureRecognizer *leftSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
rightSwipeGesture.direction = UISwipeGestureRecognizerDirectionRight;
leftSwipeGesture.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:rightSwipeGesture];
[self.view addGestureRecognizer:leftSwipeGesture];

[_webView.scrollView.panGestureRecognizer requireGestureRecognizerToFail:rightSwipeGesture];
[_webView.scrollView.panGestureRecognizer requireGestureRecognizerToFail:leftSwipeGesture];

这应该适合你。

Answer 2

只需将UIGestureRecognizer子类附加到该视图并保持调用...

UISwipeGestureRecognizer* rightSwipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(someAction)];
rightSwipeRecognizer.numberOfTouchesRequired = 2;
rightSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
rightSwipeRecognizer.cancelsTouchesInView = YES;
[self.webView addGestureRecognizer:rightSwipeRecognizer]; // add in your webviewrightSwipeRecognizer

Answer 3

Try like below it will help you
UISwipeGestureRecognizer *rightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipeHandle:)];
    rightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
    rightRecognizer.numberOfTouchesRequired = 2;
    [self.view addGestureRecognizer:rightRecognizer];
    [rightRecognizer release];

Answer 4

我不认为滑动手势会为您的目标行为提供支持，但您可以通过执行以下操作轻松完成：

，设置一个标志并启动一个计时器;其余的什么都不做;
，

一个。如果定时器已经触发（当触发时，定时器重置标志），按照点1进行操作。

湾是计时器没有被触发（标志仍然设置），然后你动作并取消计时器。

您可能会考虑定义UISwipeGestureRecognizer的子类来封装所有这些行为。

检测UIWebview中的滑动手势

4 个答案: