无法读取通过ios7中的url下载和保存的某些json文件

我在阅读一些.json文件时遇到了问题，它在可以通过IE像网页一样读取的json上运行良好，但在url像ftp样式一样尝试下载的文件上不起作用

最后，我正在考虑一旦成功就用json信息填充标签，但看不出是什么导致了URLRequest

这就是我测试它的代码：

//  WDViewController.h
#import <UIKit/UIKit.h>

@interface WDViewController : UIViewController{
    NSArray *jsonArray;
    NSMutableData *data;
}

@property (weak, nonatomic) IBOutlet UILabel *outputLabel;

-(IBAction)WDPlayerButtonUpdate:(id)sender;
@end

//  WDViewController.m
#import "WDViewController.h"

@interface WDViewController ()

@end

@implementation WDViewController

@synthesize outputLabel;

-(IBAction)WDPlayerButtonUpdate:(id)sender{

    NSURL *url = [NSURL URLWithString:@"http://gooruism.com/feed/json"];
    NSURLRequest *data = [NSURLRequest requestWithURL:url];

    [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    data = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData{
    [data appendData:theData];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{

    jsonArray = [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];

        // Loop through jsonArray
    for (int i = 0; i< jsonArray.count; i++)
        {
        outputLabel.text = [[jsonArray objectAtIndex:i] objectForKey:@"889"]; // Set Labels
        }
}    
@end

---

json文件和url只是我在Google上寻找解决方案时发现的，仅供测试使用。

在更多的Google和对json的了解之后， 我让代码正常工作了

结果是空索引的空豁免，并且没有正确调用objectForKeys，因为在使用填充标签时留下了出错的字符串

代码我终于开始工作了：

//
//  WDViewController.m
//  JSON Test

#import "WDViewController.h"

@interface WDViewController ()

@end

@implementation WDViewController

@synthesize testLabel;

-(IBAction)WDPlayerButtonUpdate:(id)sender
{
        // Set network activity indicator
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

        // Set json url.
    NSURL *url = [NSURL URLWithString:@"<url for json>"];

        // get the url page into the nsdata object.
    NSData *jsonData = [NSData dataWithContentsOfURL:url];

        // Read json (from jasondata) and convert to object.
    if ( jsonData != nil)
        {
        NSError *error = nil;
        id result = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];

        if (error == nil)
            NSLog (@"%@", result);

        NSLog(@"Test 1");
            // Retrieve array and show in log
        NSLog(@"From status index: %@", [result objectForKey:@"status"]);

            // Retrieve data and log
        NSLog(@"From profile.handle index: %@", [[result objectForKey:@"profile"]objectForKey:@"handle"]);

        NSLog(@"Next Test 2"); // Populate label with data handle
        yestLabel.text = [[result objectForKey:@"profile"]objectForKey:@"handle"];

        NSLog(@"End of Tests");
        }
}
@end