iOS-OC-UIWebView请求超时的提示拦截

下面代码直接复制到自己的ViewController里面便可测试,希望帮到大家（代码来源于网络）

#import "ViewController.h"

#define URL @"https://itunesconnect.apple.com/"

@interface ViewController ()
{
    NSURLConnection *theConnection;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIWebView *myWebview = [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [self.view addSubview:myWebview];
   
    NSURL *url = [NSURL URLWithString:URL];
    NSURLRequest *request =[NSURLRequest requestWithURL:url
                                            cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                        timeoutInterval:0.5];
    [myWebview loadRequest:request];

    
    if (theConnection)
    {
        [theConnection cancel];
        //SAFE_RELEASE(theConnection);
        NSLog(@"safe release connection");
    }
    theConnection= [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:YES];
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    if (theConnection) {
        //SAFE_RELEASE(theConnection);
        NSLog(@"safe release connection");
    }
    
    if ([response isKindOfClass:[NSHTTPURLResponse class]]){
        
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
        if ((([httpResponse statusCode]/100) == 2)){
            NSLog(@"connection ok");
        }
        else{
            NSError *error = [NSError errorWithDomain:@"HTTP" code:[httpResponse statusCode] userInfo:nil];
            if ([error code] == 404){
                NSLog(@"404");
            }
        }
    }
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    
    if (theConnection) {
        //SAFE_RELEASE(theConnection);
        NSLog(@"safe release connection");
    }
//    if (loadNotFinishCode == NSURLErrorCancelled)  {
//        return;
//    }
    if (error.code == 22) //The operation couldn’t be completed. Invalid argument
    {
        NSLog(@"22");
    }
    else if (error.code == -1001) //The request timed out.  webview code -999的时候会收到－1001，这里可以做一些超时时候所需要做的事情，一些提示什么的
    {
        NSLog(@"-1001");
    }
    else if (error.code == -1005) //The network connection was lost.
    {
        NSLog(@"-1005");
    }
    else if (error.code == -1009){ //The Internet connection appears to be offline
        //do nothing
        NSLog(@"-1009");
    }
}