关于ios发送数据转换成16进制

Question

先贴上代码：

//
// UDPDemoViewController.m
// UDPDemo
//
// Created by Leo Lin on 3/12/14.
// Copyright (c) 2014 Leo Lin. All rights reserved.
//

#import "UDPDemoViewController.h"

@interface UDPDemoViewController ()

@end

@implementation UDPDemoViewController

• (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
  {
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if (self) {
  // Custom initialization

  udpSocket = [[AsyncUdpSocket alloc] initWithDelegate:self];
  
  NSError *error = nil;
  
  if (![udpSocket bindToPort:0 error:&error])
  {
      NSLog(@"Error binding: %@", error);
      //return;
  }
  
  [udpSocket receiveWithTimeout:-1 tag:0];
  
  NSLog(@"Ready");
  

  }
  return self;
  }

• (void)viewDidLoad
  {
  [super viewDidLoad];
  // Do any additional setup after loading the view from its nib.
  }

• (void)didReceiveMemoryWarning
  {
  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.
  }

-(IBAction)SendUDPMessage
{
NSString *host = @"192.168.1.103";
int port = 60000;
NSString *msg = @"iPhone";

NSData *data = [msg dataUsingEncoding:NSUTF8StringEncoding];
[udpSocket sendData:data toHost:host port:port withTimeout:-1 tag:tag];

}

@end

现在发送的是文本格式，我想怎么才能16进制发送出去啊！

Answer 1

发出去是什么有什么重要的吗 实际上传输的都是二进制代码，你要做的就是接收的时候再转换你想要的格式，格式转化函数基本每个语言都差不多的，以c为例sprintf ios应该也有类似的吧