字典转为Json字符串

//字典转为Json字符串

+(NSString *)dictionaryToJson:(NSDictionary *)dic

{

    NSError *error = nil;

    NSData *jsonData = [NSJSONSerializationdataWithJSONObject:dic options:NSJSONWritingPrettyPrintederror:&error];

    return [[NSStringalloc] initWithData:jsonDataencoding:NSUTF8StringEncoding];

}