01json转字符串

/**

 *  json转字符串声明

 */

+ (NSString *)jsonToString:(NSDictionary *)dic;

/**

 *  json转字符串实现

 */

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

{

    if(!dic){

        return nil;

    }

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];

    return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

}