状态栏仅在 UIWebView 向下滚动时检测点击 [英] Status bar detects taps only when the UIWebView is scrolled down a bit

问题描述

我有一个 UIWebView 作为 UINavigationController 的根视图.当网页完成加载时，我隐藏了导航栏，并且我正在寻找一种将其显示回来的方法.现在，当用户点击状态栏 (这种方法在我看来比我想要的更复杂).

I have a UIWebView as the root view of a UINavigationController. When a webpage finishes to load, I hide the navigation bar, and I'm looking for a way to show it back. Right now, I'm trying to do that when the user taps the status bar (this approach looks to me more complicated than what I want).

为了实现这一点，首先我得到了 webView 的 scrollView:

In order to accomplish this, firstly I get the scrollView of the webView:

for (id subview in mainWebView.subviews) {
    if ([[subview class] isSubclassOfClass: [UIScrollView class]]) {
        ((UIScrollView *)subview).delegate = self;
    }
}

然后我使用委托方法:

-(BOOL) scrollViewShouldScrollToTop:(UIScrollView *)scrollView {
    [self.navigationController setNavigationBarHidden:NO animated:YES];
    return NO;
}

我希望这会奏效，但结果是这样的:

I was hoping that this would work, but here is what happens:

• 页面加载，导航栏隐藏(很好)
• 我尝试点按状态栏，但没有任何反应(这很糟糕)
• 我向下滚动，使 webview 离状态栏很远"
• 在不放开 webview 的情况下，我用另一个手指点击状态栏，它就可以工作了！(这很奇怪:)

Soooo，对此有什么帮助吗?为什么会发生这种情况?

Soooo, any help regarding that? Why is this happening?

推荐答案

我刚刚在 iOS 5.0 中再次尝试了这个，它似乎按预期工作:

I just tried this again in iOS 5.0 and it seems to work as expected:

[self.webView.scrollView setDelegate:self];
[self.webView.scrollView setScrollsToTop:YES];

然后:

-(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
{
    [self.navigationController setNavigationBarHidden:NO animated:NO];
}

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