Ios5 MKNetworkkit:从服务器获取JSONArray

我正在使用MKNewtworkkit进行网络操作，这是我的ios应用程序。我在服务器中有JSONInterface，通过它我可以检索JSONArray。我也可以在android应用程序和浏览器中获取数据，但当我尝试使用MKNetworkkit[completedOperation responseJSON]刷新数据时，返回的是零。你能帮帮我吗

MKNetworkEngine *network_engine= [[MKNetworkEngine alloc] initWithHostName:@"****.com"];
 NSMutableDictionary* params=[[NSMutableDictionary alloc] initWithCapacity:3];
[params setObject:[self.userName text] forKey:@"user"];
[params setObject:[self.password text] forKey:@"password"];
[params setObject:@" " forKey:@"meters"];
MKNetworkOperation* operation =[network_engine operationWithPath:@"q/out" params:params httpMethod:@"GET" ssl:NO]; 
[operation onCompletion:^(MKNetworkOperation *completedOperation) {
    NSLog(@"response: %@",[completedOperation responseString]);
    @try {
        NSArray *data_array=[completedOperation responseJSON];
        for (int i=0; i<[data_array count]; i++) {
            NSDictionary *dict=[data_array objectAtIndex:i];
            NSString *id=[dict valueForKey:@"mid"];
            NSString *location=[dict valueForKey:@"location"];
            NSLog(@"id:%@ , location:%@",id,location);
        }
    }

    @catch (NSException *exception) {
        NSLog(@"Exception: %@",[exception name]);
    }

} onError:^(NSError *error) {
         NSLog(@"Couldn't make network call");
}];
[network_engine enqueueOperation:operation];

MKNetworkEngine*网络引擎=[[MKNetworkEngine alloc]initWithHostName:@“***.com”]；
NSMutableDictionary*参数=[[NSMutableDictionary alloc]initWithCapacity:3]；
[params setObject:[self.userName text]forKey:@“user”]；
[params setObject:[self.password text]forKey:@“password”]；
[params setObject:@“forKey:@“meters”]；
MKNetworkOperation*operation=[网络引擎操作，路径：@“q/out”参数：参数httpMethod:@“GET”ssl:NO]；
[完成操作：^（MKNetworkOperation*completedOperation）{
NSLog（@“响应：%@，[completedOperation responseString]）；
@试一试{
NSArray*数据_数组=[completedOperation responseJSON]；
对于（inti=0；i我知道这是一篇老文章，但万一其他人看到这篇文章

看起来您正在将“responseJSON”转换为NSArray，但它应该是NSDictionary

这对我有用->

    MKNetworkOperation *op = [mkNetworkEngine operationWithURLString:CONFIG_FILE_URL];
[op setShouldNotCacheResponse:YES];

[op addCompletionHandler:^(MKNetworkOperation *completedOperation) {

    NSLog(@"** Success downloading config file...");

    NSDictionary* responseJSON = completedOperation.responseJSON;


} errorHandler:^(MKNetworkOperation *completedOperation, NSError *error) {

    NSLog(@"** Failed downloading config file - error: %@",error);

}];

[mkNetworkEngine enqueueOperation:op];