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

if ([request.mainDocumentURL.relativePath isEqualToString:@"/alert"]) {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"本地代碼執(zhí)行" delegate:self cancelButtonTitle:@"確定" otherButtonTitles: nil];

[alert show];

return false;? //執(zhí)行本地代碼，返回false不讓網(wǎng)頁讀取網(wǎng)絡資源

}

return true;? //為yes加載內(nèi)容，否則不

}