Question

我正在初始视图控制器的viewDidAppear中对服务器进行URL调用。如果服务器调用成功（服务器发送响应代码1），则只有用户可以访问该应用程序，否则会要求他重试。即使互联网已连接，第一个网址调用失败的次数约为2次，响应为nil（已将 timeoutInterval设置为7秒）。我使用Chrome Postman插件测试了相同的网址调用。但它正在响应每一个请求。可能是什么原因？它发生在某个时间，所以它也不可重现.Below是我的AppDelegate代码

//Setting up NSURL Cache
NSURLCache *URLCache = [[NSURLCache alloc] initWithMemoryCapacity:4 * 1024 * 1024
                                                     diskCapacity:20 * 1024 * 1024
                                                         diskPath:nil];
[NSURLCache setSharedURLCache:URLCache];

//Setting up AWS Thing
AWSStaticCredentialsProvider *credentialsProvider=[[AWSStaticCredentialsProvider alloc] initWithAccessKey:k_AmazonKeyID secretKey:k_AmazonPassword];

AWSServiceConfiguration *configuration = [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSWest2 credentialsProvider:credentialsProvider];
[AWSServiceManager defaultServiceManager].defaultServiceConfiguration = configuration;

//Setting up for RateApp thing
[Appirater setAppId:@"********"];
[Appirater setDebug:YES];

[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
return YES;

以下代码是viewDidAppear中的方法，我在这里调用URL

+(void)callURLWithString:(NSString*)urlStr withBody:(NSDictionary*)dict andIsMethodPOST:(BOOL)isPOST withBlock:(void(^)(NSData *data,NSError *error))block
{
NSString *body=[HelperMethods_SuperdocPatientsAPI     makeParamtersString:dwithEncoding:NSUTF8StringEncoding];
NSURL *url;
NSMutableURLRequest *request;
NSURLRequestCachePolicy policy;

if (isPOST) {
    //Post method
    url=[NSURL URLWithString:urlStr];
    request=[NSMutableURLRequest requestWithURL:url     cachePolicy:poltimeoutInterval:k_URLTimeoutSeconds];

    [request setHTTPMethod:@"POST"];
    [request addValue:@"text/plain" forHTTPHeaderField:@"Content-type"];
    [request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
}
else
{
    //Get method
    url= [NSURL URLWithString:[NSString stringWithFormat:@"%@?%@",urlStr,body]];
    request=[NSMutableURLRequest requestWithURL:url     cachePolicy:poltimeoutInterval:k_URLTimeoutSeconds];
    [request setHTTPMethod:@"GET"];
    [request addValue:@"text/plain" forHTTPHeaderField:@"Content-type"];
}

NSHTTPURLResponse *response = nil;
NSError *error;

NSData *outputReceived=[NSURLConnection     sendSynchronousRequest:requreturningResponse:&response error:&error];

if (response == nil) {
    dispatch_async(dispatch_get_main_queue(), ^{
        [[[UIAlertView alloc] initWithTitle:@"Oops!" message:@"Please Check YInternet     Connection and Try Again" delegate:self cancelButtonTitle:@"otherButtonTitles:nil]    show];
    });
    NSLog("%@",error.description);
    block(nil,error);
}
else
{
    block(outputReceived,nil);
}
}

使用AFNetworking Library会解决我的问题吗？

初始视图控制器的viewDidAppear中的URL调用失败

0 个答案: