iOS 网络连接是否真的通畅

//检测网络是否可以使用

+(BOOL)checkNetworkCanUse{

//    NSURL *myUrl = [NSURL URLWithString:@"http://139.196.201.235:8006/checknet/checknet.html"];

//    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:myUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:3];

//    NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

//    NSString* result1 = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

//  // NSLog(@"验证是否联网返回的结果是%@",result1);

//    if ([result1 isEqualToString:@""]) {

//        return NO;

//    }else if (result1) {

//    return YES;

//    }else {

//    return NO;

//    }

//    if ([self CheckCycle] == SUCCESS) {

//        return YES;

//    }else {

//        return NO;

//    }

//用苹果官方的检测是不是真正能联网

NSURL *myUrl = [NSURL URLWithString:@"http://captive.apple.com/hotspot-detect.html"];

// NSURLRequest* request = [NSURLRequest requestWithURL:myUrl cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:3];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myUrl];

NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

NSString* result1 = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

if ([result1 isEqualToString:@""]) {

return NO;

}else if ([result1 isEqualToString:@"Success"]) {

return YES;

}else {

return NO;

}

}