變量不是一個CFString

Question

我從JSON獲得價值它給出異常var不是CFString。 下面是從我收到數據 http://www.krsconnect.no/community/api.html?method=categories&appid=620&mainonly=true

NSString *test = aBook.catId鏈路;

圖書類

@interface Book : NSObject { 


NSString *catId; 


NSString *name; 

}

@property(nonatomic,retain)NSString*catId; 

@property(nonatomic,retain) NSString *name; 

@end 





    #import "Book.h" 


    @implementation Book 


    @synthesize catId,name; 


    -(id)init{ 

    self=[super init]; 

    } 

    - (id)initWithDictionary:(NSDictionary*) dict { 


self.catId = [dict valueForKey:@"categoryId"]; 
self.name = [dict valueForKey:@"name"]; 




     return self; 



     } 

    - (void)dealloc { 
    [catId release]; 
    [name release]; 
    [super dealloc]; 
    } 


    @end 

Answer 1

它也許整數。用這個。

NSString* test = [NSString stringWithFormat:@"%d",aBook.catId]; 

Answer 2

我認爲這個問題應該可以幫助您

Replace multiple characters in a string in Objective-C?

CFStringRef aCFString = (CFStringRef)aNSString; 

作品完美，透明。同樣的：

NSString *aNSString = (NSString *)aCFString;