如何使用以下格式解析JSONKit中的數據

Question

我有以下數據，我想打印具有以下結構的項目列表。

讓我知道我該怎麼做。

我無法使用以下語法獲取數據。

/* Data to Row Json from URL*/ 
NSString *MyRowJson = [NSString stringWithContentsOfURL:url 
               encoding:NSUTF8StringEncoding error:nil]; 

/* Copy data to Items from MyRowJson*/ 
NSDictionary *items = [MyRowJson objectFromJSONStringWithParseOptions:true]; 

/*get the deals data*/ 
NSMutableArray *ResponseData = [items objectForKey:@"deals"]; 

/*Get the count and based on this loop through the objects.*/  
NSLog(@"deals data count is %d",[ResponseData count]); 

這裏我在打印計數時得到了異常。

以下是我的數據結構。

{ 
    "meta": { 
     "code": 200 
    }, 
    "response": { 
     "deals": [ 
      { 
       "id": 32373, 
       "date_added": "2011-01-13 12:12:50", 
       "end_date": "2011-01-14 10:00:00", 
       "active": 1, 
       "discount": { 
        "raw": 71, 
        "formatted": "71%" 
       }, 
       "price": { 
        "raw": "85.00", 
        "formatted": "$85" 
       }, 
       "value": { 
        "raw": "300.00", 
        "formatted": "$300" 
       }, 
       "title": "$85 For $300 Babyface Facial At Park Avenue MedSpa", 
       "yahoo_title": "71% off Babyface Facial", 
       "url": "http://yahoo.com/aff/click/?deal=AvwTADtE&key=F374EFbM", 
       "yahoo_url": "http://yahoo.com/new-york/livingsocial/85-for-300-babyface-facial-at-park-avenue-medspa/", 
       "mobile_url": "http://m.yahoo.com/new-york/livingsocial/85-for-300-babyface-facial-at-park-avenue-medspa/", 
       "images": { 
        "image_big": "http://d22nv2k05ynu7x.cloudfront.net/deal_images/deal/85-for-300-babyface-facial-at-park-avenue-medspa-1294920769_display_image.jpg", 
        "image_small": "http://d22nv2k05ynu7x.cloudfront.net/deal_images/deal/85-for-300-babyface-facial-at-park-avenue-medspa-1294920769_small_image.jpg" 
       }, 
       "division": { 
        "slug": "new-york", 
        "name": "New York", 
        "active": 1, 
        "time_zone_diff": -4, 
        "lat": "40.7142690000000000", 
        "lon": "-74.0059730000000000", 
        "url": "http://yahoo.com/new-york/" 
       }, 
       "tags": [ 
        { 
         "name": "Facial", 
         "slug": "facial", 
         "url": "http://yahoo.com/new-york/deals/facial/" 
        }, 
        { 
         "name": "Spa", 
         "slug": "spa", 
         "url": "http://yahoo.com/new-york/deals/spa/" 
        } 
       ], 
       "business": { 
        "name": "Park Avenue MedSpa", 
        "url": "", 
        "locations": [ 
         { 
          "address": "565 Park Ave", 
          "locality": "New York", 
          "phone": "212-593-8821", 
          "lat": null, 
          "lon": null, 
          "state": NY, 
          "zip_code": "11211" 
         } 
        ] 
       }, 
       "source": { 
        "name": "LivingSocial", 
        "slug": "livingsocial", 
        "paid": 0, 
        "url": "http://yahoo.com/new-york/livingsocial" 
       } 
      } 
     ] 
    } 
} 

Answer 1

你正確pasring數據和你搶，從最頂端節點的交易，但它是響應節點下：

NSString *jsonData = [NSString stringWithContentsOfURL:url 
               encoding:NSUTF8StringEncoding error:nil]; 
NSError *error = nil; 
NSDictionary *items = [jsonData JSONObjectWithData:data options:0 error:&error]; 

if (!items) { 
    NSLog(@"Could not parse json:%@", error); 
    return; 
} 
/*get the deals data*/ 
NSDictionary *response = [items objectForKey:@"response"]; 
NSArray *dealsArray = [response objectForKey:@"deals"]; 

/*Get the count and based on this loop through the objects.*/  
NSLog(@"deals data count is %d",[dealsArray count]); 

對象還返回來回JSON是inmutable，因此你不能將它們分配給可變對象。 您將需要使用copyMutable無法修改類型的方法來獲取可變類型。 請記住copyMutable需要在非ARC項目中發佈。