问题描述

与WindowsPhone不同，iOS UIWebView并不认为403/404这种情况下页面访问是失败的，这也情有可原，但有时候，我们需要对WebView所遇到的403/404进行处理。

解决思路

由于WebView在回调事件，要么发生在NSURLConnection请求之前：

- (BOOL)webView:(UIWebView *)webView
shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;

- (void)webViewDidStartLoad:(UIWebView *)webView;

要么发生在NSURLConnection请求之后：

- (void)webViewDidFinishLoad:(UIWebView *)webView;

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error;

这两种情况下都无法获取状态码，故NSURLConnection必须由我们来完成。然后让WebView调用loadData方式展现页面，而403/403由我们自己处理。

[python] view
plain copy

#pragma mark -
#pragma mark - UIWebView Delegate Methods
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
static BOOL isRequestWeb = YES;
if (isRequestWeb) {
NSHTTPURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
if (response.statusCode == 404) {
// code for 404
return NO;
} else if (response.statusCode == 403) {
// code for 403
return NO;
}
[webView loadData:data MIMEType:@"text/html" textEncodingName:nil baseURL:[request URL]];
isRequestWeb = NO;
return NO;
}
return YES;
}