NSURLConnection, didReceiveResponse expectedContentLength get-

Question

서버에서 데이터를 가져 오는 데 GET을 사용하고 있습니다. 진도 표시 줄을 구현하고 싶습니다. didReceiveResponse 대리자 메서드에서 expectedContentLength를 캡처하려고했습니다. 어떻게 해결할 수 있습니까?

NSString* serverUrl = @"https:testURL"; 

receivedData = [[NSMutableData alloc] initWithLength:0]; 

NSURL* url =[NSURL URLWithString:[serverUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url]; 

[theRequest setValue:@"identity" forHTTPHeaderField:@"Accept-Encoding"];**(I tried it after seeing other solutions over Web)** 

[NSURLConnection connectionWithRequest:theRequest delegate:self]; 

은 ...

- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 

    [receivedData setLength:0]; 
    expectedBytes = [response expectedContentLength]; 
} 

Answer 1

- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ 
    _contentLength = [response expectedContentLength]; 

} 
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ 
_receiveLength += data.length; 
} 

당신은 그렇게 생각하십니까?