停止UIWebView垂直“弹跳”?

有人知道如何阻止UIWebView垂直反弹吗?我的意思是，当用户触摸他们的iphone屏幕，向下拖动他们的手指时，web视图在我加载的网页上方显示一个空白点?

我研究了以下可能的解决方案，但没有一个适合我:

http://www.iphonedevsdk.com/forum/iphone-sdk-development/996-turn-off-scrolling-bounces-uiwebview.html

http://forums.macrumors.com/showthread.php?t=619534

我如何停止一个UIScrollView水平反弹?

当前回答

我很恼火地发现UIWebView不是一个滚动视图，所以我做了一个自定义子类来获得web视图的滚动视图。这个子类包含一个滚动视图，所以你可以自定义你的web视图的行为。这门课的妙语是:

@class CustomWebView : UIWebview
...

- (id) initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
// WebViews are subclass of NSObject and not UIScrollView and therefore don't allow customization.
// However, a UIWebView is a UIScrollViewDelegate, so it must CONTAIN a ScrollView somewhere.
// To use a web view like a scroll view, let's traverse the view hierarchy to find the scroll view inside the web view.
for (UIView* v in self.subviews){
    if ([v isKindOfClass:[UIScrollView class]]){
        _scrollView = (UIScrollView*)v; 
        break;
    }
}
return self;

}

然后，当你创建一个自定义web视图时，你可以禁用反弹:

customWebView.scrollView.bounces = NO; //(or customWebView.scrollView.alwaysBounceVertically = NO)

这是一个伟大的通用方法，使web视图具有自定义滚动行为。这里有几件事需要注意:

as with any view, you'll also need to override -(id)initWithCoder: if you use it in Interface Builder when you initially create a web view, its content size is always the same as the size of the view's frame. After you scroll the web, the content size represents the size of the actual web contents inside the view. To get around this, I did something hacky - calling -setContentOffset:CGPointMake(0,1)animated:YES to force an unnoticeable change that will set the proper content size of the web view.

2010-06-08 20:55:54

其他回答

我所做的就是:

UIView *firstView = [webView.subviews firstObject];

if ([firstView isKindOfClass:[UIScrollView class]]) {

    UIScrollView *scroll = (UIScrollView*)firstView;
   [scroll setScrollEnabled:NO];  //to stop scrolling completely
   [scroll setBounces:NO]; //to stop bouncing 

}

对我来说很好… 此外，如果你在这个问题中使用这个选项，苹果会拒绝它你的iPhone应用。

2010-08-22 15:39:23

我遍历UIWebView的子视图集合，并将它们的背景设置为[UIColor blackColor]，与网页背景的颜色相同。视图仍然会反弹，但它不会显示丑陋的深灰色背景。

2010-03-02 09:51:13

在寻找答案的过程中偶然发现了这个，我最终只是在瞎折腾的过程中幸运地找到了自己的答案。我所做的