NSDictionary *dic = @{@"name":@"zhuzhu", @"age":@};

    if (![NSJSONSerialization isValidJSONObject:dic]) {

        NSLog(@"该对象不支持转换");

        return;

    }

    /**

     - Top level object is an NSArray or NSDictionary

     - All objects are NSString, NSNumber, NSArray, NSDictionary, or NSNull

     - All dictionary keys are NSStrings

     - NSNumbers are not NaN or infinity

     */

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

    NSString *jsonStr = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", jsonStr);

NSDictionary *dic = @{@"name":@"zhuzhu", @"age":@};

    if (![NSJSONSerialization isValidJSONObject:dic]) {

        NSLog(@"该对象不支持转换");

        return;

    }

    /**

     - Top level object is an NSArray or NSDictionary

     - All objects are NSString, NSNumber, NSArray, NSDictionary, or NSNull

     - All dictionary keys are NSStrings

     - NSNumbers are not NaN or infinity

     */

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:kNilOptions error:nil];
　　// 反序列的代码
    NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:nil]; NSLog(@"dic=%@", jsonDic);