如何将NSURLSessionConfiguration配置为NSObject类？

Question

当我得到响应时，我想从NSObject获得服务器响应，它必须返回到viewController.as，我在服务器上实现了对NSObject类的调用，然后我调用了NSObject方法，但是在服务器响应之前，NSString作为null返回。

 NSObject class :   

     @interface getServerCallClassMethod :
     NSObject<NSURLSessionDelegate>
{
         NSString *ResponceStr; 
}
-(NSString *)getServerCall:(NSString *)mobleNo serverUrl:(NSString *)url;

     @end 

执行部分：

@implementation getServerCallClassMethod

-(NSString *)getServerCall:(NSString *)mobleNo serverUrl:(NSString *)url{    

NSURLSessionConfiguration *sessionConfig=[NSURLSessionConfiguration defaultSessionConfiguration]; 
      NSURLSession *urlSession=[NSURLSession
         sessionWithConfiguration:sessionConfig delegate:self
         delegateQueue:[NSOperationQueue mainQueue]];
     NSURL *servrurl=[NSURL URLWithString:GetOTP]; 
    NSURLSessionDataTask *dataTask=[urlSession
         dataTaskWithURL:servrurl completionHandler:^(NSData * _Nullable data,
         NSURLResponse * _Nullable response, NSError * _Nullable
         connectionError)
        {  if (data.length > 0 && connectionError == nil){   
            ResponceStr=@"success"; } else{   ResponceStr=@"fail"; 
        }
       }];
         [dataTask resume]; 
     });
             return ResponceStr;
     } 
  In Vc : 
    getServerCallClassMethod  *GetServerCallMethod=[[getServerCallClassMethod alloc]init]; 

    NSString *valide=[GetServerCallMethod getServerCall:@"800000000" serverUrl:@"http://www.gg.com"]; NSLog(@"valide");

Answer 1

试试这个：

接口文件中的

@interface APISession : NSURLSession <NSURLSessionDownloadDelegate,NSURLSessionDelegate,NSURLSessionDataDelegate,NSURLSessionTaskDelegate>

+(void)apiCallSharedSessionGet:(NSString *)strURL withCompletionHandlar:(void (^) (NSString *response, NSError *error, int status)) completionBlock;

实现文件中的

@implementation APISession



+(void)apiCallSharedSessionGet:(NSString *)strURL withCompletionHandlar:(void (^) (NSString *response, NSError *error, int status)) completionBlock
{


    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:strURL]];
    [request setHTTPMethod:@"GET"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

   __block NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error!=nil)
        {
            completionBlock(nil,error,0);
            [task suspend];
        }
        else
        {
            NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
            NSLog(@"requestReply: %@", requestReply);
            completionBlock(requestReply,error,1);
            [task suspend];
        }

    }];
 [task resume];

}

Answer 2

如果您想在开始接收数据之前从NSURLSessionDataTask获得响应，不要用dataTaskWithURL: completionHandler作为初始NSURLSessionDataTask。您应该使用dataTaskWithURL初始化数据任务，而不是处理委托。

NSURLSessionConfiguration *sessionConfig=[NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *urlSession=[NSURLSession sessionWithConfiguration:sessionConfig delegate:self delegateQueue:[NSOperationQueue mainQueue]]; 
NSURL *servrurl=[NSURL URLWithString:GetOTP]; 
NSURLSessionDataTask *dataTask=[urlSession dataTaskWithURL:servrurl];

您应该在委托文件中添加符合NSURLSessionDataDelegate的内容。

在您的委托实现中：

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler {
    NSLog(@"Response: %@", response);
    completionHandler(NSURLSessionResponseAllow); // Allow to continue this request
}

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
    NSLog(@"Receive data");
}

请注意，您应该正确地实现第二个委托方法，以接收请求的全部数据，因为数据不会立即收到。

有关更多信息，请参阅本文档：ref/occ/intfm/NSURLSessionDataDelegate/URLSession:dataTask:didReceiveData