Afnetworking代理方法没有被调用

Question

这是我的代码，请检查我错了。在请求后将不会调用成功或失败的方法。请帮助我。

-(void)downLoadTask { 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 

    NSString* mediaKey = [NSString stringWithFormat:@"%@/Sample.m4v", documentsDirectory]; 
    NSLog(@"%@",mediaKey); 
    NSString *strPath = @"/sites/default/files/media/Master_Talara1_9.mp4"; 

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:[self.HTTPClient requestWithMethod:@"GET" path:strPath parameters:nil]]; 

    operation.downloadSpeedMeasure.active = YES; 

    [operation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{ 
     NSLog(@"time out"); 
     // Clean up anything that needs to be handled if the request times out 
     // It may be useful to initially check whether the operation finished or was cancelled 
    }]; 

    operation.outputStream = [NSOutputStream outputStreamToFileAtPath:mediaKey append:NO]; 

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { 
     NSLog(@"Success"); 
    } 
    failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
     NSLog(@"%@",error); 
    }]; 

    [operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { 
     humanReadableRemaingTime = [operation.downloadSpeedMeasure humanReadableRemainingTimeOfTotalSize:totalBytesExpectedToRead numberOfCompletedBytes:bytesRead]; 

     NSLog(@"Time is human read %@",humanReadableRemaingTime);   
    }];  
} 

是否有被implemnted任何几种方法得到调用AFNetWorking委托方法

Answer 1

你忘了写在代码的函数年底开始下载任务。

[operation start];