OBJECT Convert JSON

    //数组转NSData    NSData *jsonData =  [self toJSONData:self.contactInfosArr];    NSString *insertQuoteStr = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];;    WDLog(@"%@",insertQuoteStr);

// 将字典或者数组转化为JSON串- (NSData *)toJSONData:(id)theData{        NSError *error = nil;    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:theData                                                       options:NSJSONWritingPrettyPrinted                                                         error:&error];        if ([jsonData length] > 0 && error == nil){        return jsonData;    }else{        WDLog(@"%@",error);        return nil;    }}

运用runtime API

iOS 将NSArray、NSDictionary转换为JSON格式进行网络传输

http://blog.csdn.net/worldzhy/article/details/49982491