问使用json从本地文件传递数据

EN

@interface NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONString:(NSString*)fileLocation;
@end

@implementation NSDictionary(JSONCategories)

+(NSDictionary*)dictionaryWithContentsOfJSONString:(NSString*)fileLocation{
    NSData* data = [NSData dataWithContentsOfFile:fileLocation];
    __autoreleasing NSError* error = nil;
    id result = [NSJSONSerialization JSONObjectWithData:data 
                                                options:kNilOptions error:&error];
    if (error != nil) return nil;
    return result;
}
@end

@implementation ViewController
@synthesize name;

- (void)viewDidLoad
{
    [super viewDidLoad];

}

-(void)setDataToJson{

    NSDictionary *infomation = [NSDictionary dictionaryWithContentsOfJSONString:@"Test.json"];
    name.text = [infomation objectForKey:@"AnimalName"];//does not pass data
}