UIWebView &NavigationController 在加载时崩溃 [英] UIWebView & NavigationController crashes while loading

问题描述

我有一个很奇怪的问题

我使用 UIWebView 和 NavigationController 构建了一个简单的应用程序，但问题是当加载秒页面时我回到第一页并访问了一个链接，该应用程序崩溃了，控制台什么也没说

I build a simple app with UIWebView and NavigationController but the problem is when the seconds page is loading and I go back to the first page and visited a link the APP crashes and the console says nothing

这是我完成加载的代码

-(void)webViewDidFinishLoad:(UIWebView *)aWebView {
    NSString *str = [aWebView stringByEvaluatingJavaScriptFromString:@"document.title"];
    self.navigationItem.title = str; 
     [navigationActivity stopAnimating];
}

这对于网络视图应该开始加载

and this for the web view should start loading

if(navigationType == UIWebViewNavigationTypeOther)
    {
        NSURL *url2 = [request URL];
        NSString *URLStr = [url2 absoluteString];

        RootViewController* viewController = [[RootViewController alloc] init];
        NSString *holder = [self getQueryStringInner:URLStr];
        [self getQueryString:URLStr];
        if([holder length] != 0 && [flag length] != 0 && !facebook )
        {

            appDelegate.title =@"Title"; 
            appDelegate.query = queryString;
            appDelegate.url = holder; 

            [self.navigationController pushViewController:viewController animated:YES];
            [viewController release];
            return NO;
        }
}

我对 Objective-c 和 iOS 开发真的很陌生，所以任何帮助将不胜感激

I am really new to Objective-c and iOS development so any help will be appreciated

任何帮助

推荐答案

看来必须的步骤是在你的 viewWillDisappear 中调用 [webView stopLoading].显然，Web 视图委托正在将 webViewDidFinishLoading 方法消息发送到释放的实例.很高兴你解决了.

Seems that the necessary step is to call [webView stopLoading] in your viewWillDisappear. Apparently the web view delegate was sending the webViewDidFinishLoading method message to a deallocated instance. Glad you got it worked out.

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