以下内容有一部分是来各个网站，本人自己加上自己的理解，整理，至于来源于互联网的那一部分作者是谁，来自于哪里，我现在也不知道了，写出来供大家学习。如果有你是那一部分的作者，请联系我！

先介绍一种最简单的方法：
调用打电话功能

[[UIApplicationsharedApplication] openURL:[NSURL URLWithString:@"tel://10086"]];

调用发短信功能

[[UIApplication sharedApplication]openURL:[NSURL URLWithString:@"sms://10000"]];

上面的发短信的功能是调用系统的界面，下面是实现一种点击按键就直接发送短信，相当于后台发送，能不能上软件商店，还不能确定。相对建议来说，尽量使用第一种。

首先导入MFMessageComposeViewControllerDelegate这个代理，实现里面的方法

-(void)messageComposeViewController:(MFMessageComposeViewController *)controllerdidFinishWithResult:(MessageComposeResult)result {
      //Notifies users about errors associated with the interface
      switch (result) {
         case MessageComposeResultCancelled:
            if (DEBUG) NSLog(@"Result: canceled");
            break;
         case MessageComposeResultSent:
            if (DEBUG) NSLog(@"Result: Sent");
            break;
         case MessageComposeResultFailed:
            if (DEBUG) NSLog(@"Result: Failed");
            break;
         default:
            break;
      }
      [self dismissModalViewControllerAnimated:YES];
}

群发短信：

- (IBAction)sendSMS {
      BOOL canSendSMS = [MFMessageComposeViewController canSendText];
      NSLog(@"can send SMS [%d]",canSendSMS);
      if (canSendSMS) {
         MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];
         picker.messageComposeDelegate = self;
         picker.navigationBar.tintColor = [UIColor blackColor];
         picker.body = @"test";
         picker.recipients = [NSArray arrayWithObject:@"10086"];
         [self presentModalViewController:picker animated:YES];
         [picker release];
      }
}

给一个人发短信：

从网页上获得内容

-(void)displaySMSComposerSheet
{
    MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];
    picker.messageComposeDelegate = self;
    UIWebView *web = nil;
    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：%@",[webstringByEvaluatingJavaScriptFromString:@"document.title"],absUrl];
   [absUrl release];
   [self presentModalViewController:picker animated:YES];
   [picker release];
}

事件绑定发送短信

-(IBAction)showSMSPicker:(id)sender {
    Class messageClass = (NSClassFromString(@"MFMessageComposeViewController"));
    if (messageClass != nil) {
        if ([messageClass canSendText]) {
            [self displaySMSComposerSheet];
        }
        else {
//设备没有短信功能
       }
    }
    else {
// iOS版本过低,iOS4.0以上才支持程序内发送短信
    }
}

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