NSJSONSerialization Json格式化

Question

所以我有一个数组我想转换为nsdictionary。我的过程很好，但我想为json字符串添加一个标题。

NSArray *showarray = [[MMIStore defaultStore] loadAllShows ]; 
NSMutableArray* jsonArray = [[NSMutableArray alloc] init]; 

for (Show* show in showarray) { 
    NSMutableDictionary* showDictionary = [[NSMutableDictionary alloc] init]; 
    [showDictionary setObject:show.showid forKey:@"Showid"]; 
    [jsonArray addObject:showDictionary]; 
} 
NSData* nsdata = [NSJSONSerialization dataWithJSONObject:jsonArrayoptions:NSJSONReadingMutableContainers error:nil]; 
NSString* jsonString =[[NSString alloc] initWithData:nsdata encoding:NSUTF8StringEncoding]; 
NSLog(@"%@", jsonString); 

以下的输出：

{[ 
    { 
    "Showid" : "10027" 
    }, 
    { 
    "Showid" : "10707" 
    }, 
    { 
    "Showid" : "10759" 
    }..... 

] 

我如何使它看起来像这样

{ 
    "Shows":[ 
    { 
    "Showid" : "10027" 
    }, 
    { 
    "Showid" : "10707" 
    }, 
    { 
    "Showid" : "10759" 
    }.... 
] 
} 

Answer 1

只需添加您的阵列与正确的密钥字典。

NSArray *showarray = [[MMIStore defaultStore] loadAllShows]; 
NSMutableArray* jsonShowsArray = [[NSMutableArray alloc] init]; 

for (Show* show in showarray) { 
    NSMutableDictionary* showDictionary = [[NSMutableDictionary alloc] init]; 
    [showDictionary setObject:show.showid forKey:@"Showid"]; 
    [jsonShowsArray addObject:showDictionary]; 
} 

NSDictionary* jsonDictionary = [NSDictionary dictionaryWithObject:jsonShowsArray 
                  forKey:@"Shows"] 

NSData* nsdata = [NSJSONSerialization dataWithJSONObject:jsonDictionary 
               options:NSJSONReadingMutableContainers 
               error:nil]; 

Answer 2

NSMutableString *jsonString1 = [[@"{Shows:[" stringByAppendingString:jsonString] stringByAppendingString:@"]}"]; 

由于您的jsonstring是一个字符串，你可以改变它。

希望这有助于..

编辑：

NSString *jsonString1 = [NSString stringWithFormat:@"{"Shows":%@}",jsonString];