检测是否可以发送短信，还是需要有一个触发事件的，代码如下：
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UIButton * button = [[UIButton alloc]initWithFrame:CGRectMake(140, 100, 100, 100)];
button.backgroundColor = [UIColor blackColor];
[button setTitle:@"发送短信" forState:UIControlStateNormal];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[button addTarget:self action:@selector(showSMSPicker:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
UILabel * feedbackMsg = [[UILabel alloc]initWithFrame:CGRectMake(10, 300, self.view.frame.size.width -20, 30)];
feedbackMsg.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:feedbackMsg];
self.feedbackMsg = feedbackMsg;
}
嗯，到了实现协议方法的时候了：
// -------------------------------------------------------------------------------
// messageComposeViewController:didFinishWithResult:
// Dismisses the message composition interface when users tap Cancel or Send.
// Proceeds to update the feedback message field with the result of the
// operation.
// 当用户点击取消或发送时，关闭消息组合界面。
// 收到更新反馈消息字段的结果操作。
// -------------------------------------------------------------------------------
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller
didFinishWithResult:(MessageComposeResult)result
{
self.feedbackMsg.hidden = NO;
// Notifies users about errors associated with the interface
// 通知用户与界面相关的错误
switch (result)
{
case MessageComposeResultCancelled: //取消
self.feedbackMsg.text = @"Result: SMS sending canceled";
break;
case MessageComposeResultSent: //发送
self.feedbackMsg.text = @"Result: SMS sent";
break;
case MessageComposeResultFailed: //失败
self.feedbackMsg.text = @"Result: SMS sending failed";
break;
default: //默认
self.feedbackMsg.text = @"Result: SMS not sent";
break;
}
[self dismissViewControllerAnimated:YES completion:NULL];
}
Demo运行结果如下：
至此，我们的发送短信功能就实现了，是不是很简单！但是，当年也是怂过啊，所以，特写此文，以纪念当年怂过的日子。
