ios - AFNetworking GET 请求 - 无法将 responseObject 转换为 NSDictionary

Question

我尝试了多个选项将 responseSerializer 设置为 JSON 但我无法将 responseObject 转换为 NSDictionary。问题是我得到的响应是 NSData

    NSString *baseURLString = @"Your URL?";
    NSString *str = @"adult=false&gender=male";

    NSString *url = [NSString stringWithFormat:@"%@%@",baseURLString,str];

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager GET:url parameters:nil success:^(AFHTTPRequestOperation *operation, id  responseObject) {
        // do whatever you'd like here; for example, if you want to convert
        // it to a string and log it, you might do something like:

        NSLog(@"responseObject %@",responseObject);

        NSString *jsonString = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"%@", jsonString);


    NSError* error;
    NSDictionary* json = [NSJSONSerialization
                          JSONObjectWithData:responseObject
                          options:NSJSONReadingMutableContainers
                          error:&error];
    NSLog(@"json %@",json);

    if (error) {
        NSLog(@"%@",[error description]);
    }



    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
}];

这个 NSLog(@"%@",[error description]); 给出错误如下:

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. 
(Cocoa error 3840.)" (Garbage at end.) 
UserInfo=0xa7c5440 {NSDebugDescription=Garbage at end.}

Answer 1

您的 JSON 最后返回时带有垃圾。

您应该修复您的网络服务，使其不在 JSON 的末尾嵌入时间戳和语言。如果您无法更改您的网络服务，请使用以下方法从您的 json 中删除尾随垃圾，然后再次使用 NSJSONSerialization 进行解析。

NSRange range = [jsonString rangeOfString:@"}" options:NSBackwardsSearch];
jsonString = [jsonString substringToIndex:range.location + 1];

然后将清理后的 jsonString 解析为 NSDictionary:

NSData *newJSONData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary* json = [NSJSONSerialization
                          JSONObjectWithData:newJSONData
                          options:NSJSONReadingMutableContainers
                          error:&error];
    NSLog(@"json %@",json);

它应该工作得很好。