iOS应用-设置UIWebView加载的超时 [英] iOS App - Set Timeout for UIWebView loading

问题描述

我有一个简单的iOS本机应用程序，可加载单个UIWebView.如果应用程序无法在20秒内完全完成将初始页面加载到webView中，我希望webView显示错误消息.

I have a simple iOS native app that loads a single UIWebView. I would like the webView to show an error message if the app doesn't COMPLETELY finish loading the initial page in the webView within 20 seconds.

我这样在我的viewDidLoad中加载webView的URL(简化):

I load my URL for the webView within my viewDidLoad like this (simplified):

[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.example.com"] cachePolicy:NSURLCacheStorageAllowed timeoutInterval:20.0]];

上面的代码中的timeoutInterval实际上并没有做"任何事情，因为Apple在操作系统中将其设置为实际上不会超时240秒.

The timeoutInterval within the code above does not actually "do" anything, as Apple has it set within the OS to not actually time out for 240 seconds.

我已设置我的webView didFailLoadWithError操作，但是如果用户具有网络连接，则永远不会调用它. webView只是继续尝试在我的networkActivityIndi​​cator旋转的情况下进行加载.

I have my webView didFailLoadWithError actions set, but if the user HAS a network connection, this never gets called. The webView just continues to try loading with my networkActivityIndicator spinning.

是否可以为webView设置超时?

Is there a way to set a timeout for the webView?

推荐答案

timeoutInterval用于连接.将webview连接到URL后，您将需要启动NSTimer并进行自己的超时处理.像这样:

The timeoutInterval is for connection. Once webview connected to the URL, you'll need to start NSTimer and do your own timeout handling. Something like:

// define NSTimer *timer; somewhere in your class

- (void)cancelWeb
{
    NSLog(@"didn't finish loading within 20 sec");
    // do anything error
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    [timer invalidate];
}

- (void)webViewDidStartLoad:(UIWebView *)webView
{
    // webView connected
    timer = [NSTimer scheduledTimerWithTimeInterval:20.0 target:self selector:@selector(cancelWeb) userInfo:nil repeats:NO];
}

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