定製NSMutableURLRequest AFHTTPClient子類對象

我的應用程序是使用AFNetworking Twitter的API訪問，我已經通過繼承AFHTTPClient創建一個Twitter的API客戶端：定製NSMutableURLRequest AFHTTPClient子類對象

#import "AFHTTPClient.h" 

@interface TwitterAPIClient : AFHTTPClient 

+ (TwitterAPIClient *)sharedClient; 

@end 

#import "TwitterAPIClient.h" 
#import "AFJSONRequestOperation.h" 

static NSString * const kAFTwitterAPIBaseURLString = @"http://api.twitter.com/1/"; 

@implementation TwitterAPIClient 

+ (TwitterAPIClient *)sharedClient { 
    static TwitterAPIClient *_sharedClient = nil; 
    static dispatch_once_t TwitterAPIClientToken; 
    dispatch_once(&TwitterAPIClientToken, ^{ 
     _sharedClient = [[TwitterAPIClient alloc] initWithBaseURL:[NSURL URLWithString:kAFTwitterAPIBaseURLString]]; 
    }); 

    return _sharedClient; 
} 

- (id)initWithBaseURL:(NSURL *)url { 
    self = [super initWithBaseURL:url]; 
    if (!self) { 
     return nil; 
    } 

    [self registerHTTPOperationClass:[AFJSONRequestOperation class]]; 
    [self setDefaultHeader:@"Accept" value:@"application/json"]; 

    return self; 
} 

@end

如果我在TwitterAPIClient使用getPath's & postPath's，API客戶，回報JSON響應正確，因爲我註冊了一個AFJSONRequestOperation作爲操作類。

但是，有時候，我需要創建自定義NSMutableURLRequest請求，而不是使用getPath's & postPath's AFHTTPClient函數。

當我使用這些請求時，從客戶端返回的響應是標準NSData而不是NSDictionary，因爲我從AFJSONRequestOperation獲得。

NSURL *url = [NSURL URLWithString:@"https://api.twitter.com/1.1/account/verify_credentials.json"]; 
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; 
    [self.auth authorizeRequest:request]; 

    AFHTTPRequestOperation* apiRequest = [[TwitterAPIClient sharedClient] HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, NSDictionary* responseObject) { 
     [self createAccount]; 

     self.account.username = [responseObject objectForKey:@"screen_name"]; 

     dispatch_async(dispatch_get_main_queue(), ^{ 
      [self.delegate didProfileLoaded:self.account]; 
     }); 


    } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
     if (error!=nil) { 
      NSString* errorMessage = nil; 
      NSString* errorData = [error.userInfo objectForKey:NSLocalizedRecoverySuggestionErrorKey]; 

      if (errorData!=nil) { 
       NSError* error; 
       NSDictionary* json = [NSJSONSerialization JSONObjectWithData:[errorData dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:&error]; 
       if (json!=nil && error==nil) { 
        NSArray* errorMeta = [json objectForKey:@"errors"]; 
        if (errorMeta!=nil) { 
         errorMessage = [[errorMeta objectAtIndex:0] objectForKey:@"message"]; 
        } 
       } else { 
        errorMessage = errorData; 
       } 
      } 

      dispatch_async(dispatch_get_main_queue(), ^{ 
       [self.delegate didUpdateFailed:errorMessage]; 
      }); 
     } 

    }]; 

    [[TwitterAPIClient sharedClient] enqueueHTTPRequestOperation:apiRequest];

有沒有一種方法，我可以強制這些AFHTTPRequestOperation被創建爲AFJSONRequestOperation對象？

來源

2012-12-14 aporat

對不起，我發佈了一個答案，但誤解了它，刪除了。 – allaire

只需直接創建AFJSONRequestOperation，就像這樣：

AFJSONRequestOperation* apiRequest = [[AFJSONRequestOperation alloc] initWithRequest:request]; 
[apiRequest setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { 

// .... 

} failure:^(AFHTTPRequestOperation *operation, NSError *error) { 

// ... 

}];

更多的例子here和here。

來源

2013-03-12 09:59:25

定製NSMutableURLRequest AFHTTPClient子類對象

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