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IOS程序之发送短信代码实现是本文要介绍的内容，iOS4.0新加入了MFMessageComposeViewController和MFMessageComposeViewControllerDelegate,提供了发送短信的接口,可以像发送邮件那样不用跳出程序来发送短信. 介绍可参阅Message UI Framework Reference。

一些笔记:

MFMessageComposeViewController

（1）提供了操作界面

（2）使用前必须检查canSendText方法,若返回NO则不应将这个controller展现出来,而应该提示用户不支持发送短信功能.

（3）界面不能自行定制

（4）要发送的短信的内容(body)和收件人(recipients)在展现这个controller前需初始化好,展现了之后短信内容不能通过程序来进行修改.不过用户仍然可以手工修改短信内容和选择收件人

（5）用户点了发送或者取消,或者发送失败时,MFMessageComposeViewControllerDelegate 的

– messageComposeViewController:didFinishWithResult: 

方法都能得到通知,在这里进行相应的处理

若在iOS3.0上运行的话,会提示

dyld: Symbol not found: _OBJC_CLASS_$_MFMessageComposeViewController . 

解决方案:

（1）MessageUI.framework的引入类型应选择weak(在target -> Get Info -> General -> Linked Libraries -> MessageUI.framework -> Type 里修改)

（2）不要在.h文件里直接import MessageUI/MFMessageComposeViewController.h,改为import <MessageUI/MessageUI.h>

代码:

#pragma mark -
#pragma mark SMS     -(IBAction)showSMSPicker:(id)sender {   //  The MFMessageComposeViewController class is only available in iPhone OS 4.0 or later.   //  So, we must verify the existence of the above class and log an error message for devices   //      running earlier versions of the iPhone OS. Set feedbackMsg if device doesn't support   //      MFMessageComposeViewController API.   Class messageClass = (NSClassFromString(@"MFMessageComposeViewController"));   if (messageClass != nil) {   // Check whether the current device is configured for sending SMS messages   if ([messageClass canSendText]) {   [self displaySMSComposerSheet];   }   else {   [UIAlertView quickAlertWithTitle:@"设备没有短信功能" messageTitle:nil dismissTitle:@"关闭"];   }   }   else {   [UIAlertView quickAlertWithTitle:@"iOS版本过低,iOS4.0以上才支持程序内发送短信" messageTitle:nil dismissTitle:@"关闭"];   }   }   -(void)displaySMSComposerSheet   {   MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];   picker.messageComposeDelegate = self;   NSMutableString* absUrl = [[NSMutableString alloc] initWithString:web.request.URL.absoluteString];   [absUrl replaceOccurrencesOfString:@"http://i.aizheke.com" withString:@"http://m.aizheke.com" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [absUrl length])];   picker.body=[NSString stringWithFormat:@"我在爱折客上看到：%@ 可能对你有用，推荐给你！link：%@"   ,[web stringByEvaluatingJavaScriptFromString:@"document.title"]   ,absUrl];   [absUrl release];   [self presentModalViewController:picker animated:YES];   [picker release];   }   - (void)messageComposeViewController:(MFMessageComposeViewController *)controller   didFinishWithResult:(MessageComposeResult)result {   switch (result)   {   case MessageComposeResultCancelled:   LOG_EXPR(@"Result: SMS sending canceled");   break;   case MessageComposeResultSent:   LOG_EXPR(@"Result: SMS sent");   break;   case MessageComposeResultFailed:   [UIAlertView quickAlertWithTitle:@"短信发送失败" messageTitle:nil dismissTitle:@"关闭"];   break;   default:   LOG_EXPR(@"Result: SMS not sent");   break;   }   [self dismissModalViewControllerAnimated:YES];
}  

小结：IOS程序之发送短信代码实现的内容介绍完了，希望本文对你有所帮助！