Question

我一直在尝试修复UIPageViewControllers的手势与视图中添加的手势以及位于页面控制器内的UIViewControllers之间的冲突。我只需要让UIPageViewController成为其手势的委托我该怎么做？

我已经在页面视图中确认并实现了UIGestureDelegate方法，但它们永远不会被调用。
我还循环检查UIPageViewControllers gestureRecognizers属性中是否存在手势。正如预期的那样，这个数组是nil，如文档＆＃34;中提到的..如果过渡样式是＆＃39; UIPageViewControllerTransitionStylePageCurl＆＃39;。＆＃34;
我尝试获取底层的UIScrollView并将其平移手势委托给UIPageViewController。无法这样做。

如何设置UIPageViewController手势（特别是Pan Gesture）代表。

Answer 1

这不会为UIPageViewController的内置Pan手势设置手势委托，但我有些如何设法通过获取底层的scrollview然后在滚动视图上设置新的Pan手势来解决手势冲突。这个新的Pan手势将UIPageViewController作为其委托，因此我可以调用手势委托。

-(UIScrollView *)scrollViewInsidePageControl {
    for (UIView * view in self.view.subviews) {
        if([view isKindOfClass:[UIScrollView class]])
            return (UIScrollView *)view;
    }
    return nil;
}

并在-viewDidLoad:

self.internalScrollView = [self scrollViewInsidePageControl];
self.customPanGesture = [UIPanGestureRecognizer new];
self.customPanGesture.delegate = self;
[self.internalScrollView addGestureRecognizer:_customPanGesture];

以上代码调用了UIGestureRecognizerDelegate实例上UIPageViewController的协议方法

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if(otherGestureRecognizer.view == self.internalScrollView)
        return NO;
    else
        return YES;
}


- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer == _customPanGesture)
    {
        // Did required handling here
    }
    return YES;
}

Answer 2

要设置UIPageViewController委托，只需将“UIPageViewControllerDelegate”和“UIPageViewControllerDataSource”添加到您的UIPageViewController即可。然后将UIPageViewController的委托和dataSource设置为self（委托）。

class MyPageViewController : UIPageViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource {
  override func viewDidLoad() {
     super.viewDidLoad()
     self.dataSource = self
     self.delegate = self
   }
}

如果您没有设置dataSource，您将无法在视图之间使用UIPageViewController幻灯片手势。

如何设置UIPageViewController（寻呼类型）手势委托

2 个答案: