AFNetworking 2.0 使用总结

最新推荐文章于 2022-09-13 12:09:17 发布

原创最新推荐文章于 2022-09-13 12:09:17 发布 · 747 阅读

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#ios #json #AFNetworking

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本文详细介绍了iOS开发中使用AFNetworking进行JSON Post/Get请求及图片上传的方法，包括请求参数设置、响应处理等关键步骤。

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iOS应用开发，存在网络请求是在所难免的，而AFNetworking是一个很不错的选择。以下是本人对AFNetworking请求的一些总结，但愿能帮到大家！

1.JSON Post请求

        NSString *strName = @"user1";
        NSString *strPsw = @"pwd1";
        
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:strName, @"user", strPsw, @"password", nil];
        NSString *strURL = [GT123_ServerHost stringByAppendingString:GT123_LogonServlet];
        [manager POST:strURL parameters:parameters
              success:^(AFHTTPRequestOperation *operation, id responseObject)
         {
             if (responseObject != nil)
             {
                 NSDictionary *dicRes = responseObject;
                 NSString *strState = [dicRes objectForKey:@"state"];
                 if (strState && [strState isEqualToString:@"success"])
                 {
                     NSString *strSession = [dicRes objectForKey:@"session"];
                     
                     NSLog(@"%@", strSession);
                 } else {
                 }
             } else {
             }
         } failure:^(AFHTTPRequestOperation *operation, NSError *error)
         {
         }];

上段代码是用户登录请求，用到了AFHTTPRequestOperationManager的POST请求。请求参数放到NSDictionary里（NSMutableDictionary也可），strURL是请求服务地址，success和failure后面写请求回调内容。返回内容responseObject其实是一个NSDictionary对象，解析比较容易。

2.JSON Get请求

        long long lTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
        
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
        NSString *strURL = [NSString stringWithFormat:@"%@%@?max=20&et=%lld",GT123_ServerHost,GT123_GetNewsListBeforeServlet, lTimestamp];
        [manager GET:strURL parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
            if (responseObject != nil)
            {
                NSDictionary *dicRes = responseObject;
                NSString *strState = [dicRes objectForKey:@"state"];
                if (strState && [strState isEqualToString:@"success"])
                {
                    NSArray *lNews = [dicRes objectForKey:@"post_list"];
                    if (lNews && lNews.count > 0)
                    {
                        NSLog(@"news count - %lu", (unsigned long)lNews.count);
                    }
                } else {
                }
            } else
            {
            }
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        }];

上段代码是获取新闻列表的具体实现，用到了AFHTTPRequestOperationManager的GET请求。所以请求参数放到strURL里。请求返回内容responseObject也是一个NSDictionary对象。

3.图片上传

- (void)uploadImg:(UIImage *)img withName:(NSString *)imgName {
    
    NSData *imageData = UIImageJPEGRepresentation(img, 1.0);
    
    NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];
    [parameters setObject:imgName forKey:@"name"];
    [parameters setObject:@"jpg" forKey:@"type"];
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    NSString *strURL = [GT123_ServerHost stringByAppendingString:GT123_UploadPostPictureServlet];
    [manager POST:strURL parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
     {
         if (imageData)
         {
             [formData appendPartWithFileData:imageData name:imgName fileName:imgName mimeType:@"image/jpeg"];
         }
     } success:^(AFHTTPRequestOperation *operation, id responseObject) {
         
         if (responseObject)
         {
             NSDictionary *dicRes = responseObject;
             NSString *strState = [dicRes objectForKey:@"state"];
             if (strState && [strState isEqualToString:@"success"])
             {
                 NSLog(@"upload success!");
             } else {
             }
         } else {
         }
         
     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
     }];
}

以上代码通过post方法将图片上传到服务器。与上述所讲json post请求不同，这里需要填充constructingBodyWithBlock内容，也就是图片数据和参数。图片数据是NSData类型，需要将UIImage转成NSData。如果需要传其他参数的话，放到parameters里，同图片数据一起上传服务器。

[formData appendPartWithFileData:imageData name:imgName fileName:imgName mimeType:@"image/jpeg"];

上一行代码里name和fileName参数可以随意给个值，不要太纠结。

返回内容还是一个NSDictionary对象。

AFNetworking请求方面，本人的总结暂时有这些，后续再补上...