ios - 如何将 NSURLSessionConfiguration 配置到 NSObject 类中？

Question

我想从 NSObject 获取服务器响应，当我收到响应时，它已返回到 viewController。因为我在服务器调用 NSObject 类时实现，然后我调用NSObject 方法，但在服务器响应之前，我的 NSString 已返回为 null。

 NSObject class :   

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

     @end 

实现部分:

@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:

在接口(interface)文件中

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

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

在实现文件中

@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];

}