调用拨号

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://号码"]];

调用短信

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://收信号码"]];

如果要填写发送内容

// 导入头文件
#import <MessageUI/MFMessageComposeViewController.h>
// 添加代理
MFMessageComposeViewControllerDelegate

- (void)sendSMS{

    MFMessageComposeViewController * mcViewController = [[MFMessageComposeViewController alloc] init];
    mcViewController.messageComposeDelegate = self;
    
    if ([MFMessageComposeViewController canSendText]) {
        
        mcViewController.recipients = @[@"18212345678",@"18287654321",@"18243218765"]; // 添加收件人号码，可以添加多个
        mcViewController.body       = @"这是要发送的短信内容"; // 要发送的内容
        
        [self presentViewController:mcViewController animated:YES completion:nil];
    }
}

#pragma mark - MFMessageComposeViewControllerDelegate
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{
    
    if (result == MessageComposeResultCancelled) {
        NSLog(@"短信被取消");
    }else if (result == MessageComposeResultSent) {
        NSLog(@"短信发送成功");
    }else if (result == MessageComposeResultFailed) {
        NSLog(@"短信发送失败");
    }
}

调用邮件

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://收件人邮箱地址"]];

如果要填写邮件内容

// 导入头文件
#import <MessageUI/MFMailComposeViewController.h>
// 添加代理
MFMailComposeViewControllerDelegate

- (void)sendMail{
    
    MFMailComposeViewController * mcViewController = [[MFMailComposeViewController alloc] init];
    mcViewController.mailComposeDelegate = self;
    
    if ([MFMailComposeViewController canSendMail]) {
        // 收件人
        [mcViewController setToRecipients:@[@"123456789@qq.com"]];
        // 抄送
        [mcViewController setCcRecipients:@[@"111111111@qq.com",@"222222222@qq.com",@"333333333@qq.com"]];
        // 密送
        [mcViewController setBccRecipients:@[@"000000000@qq.com"]];
        // 主题
        [mcViewController setSubject:@"邮件主题"];
        // 内容
        [mcViewController setMessageBody:@"要发送的邮件内容" isHTML:NO];
        
        [self presentViewController:mcViewController animated:YES completion:nil];
    }
}

#pragma mark - MFMailComposeViewControllerDelegate
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
    if (result == MessageComposeResultCancelled) {
        NSLog(@"邮件被取消");
    }else if (result == MessageComposeResultSent) {
        NSLog(@"邮件发送成功");
    }else if (result == MessageComposeResultFailed) {
        NSLog(@"邮件发送失败");
    }
}

调用Safari

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://网址"]];

调用AppStore

参见：iOS跳转AppStore相关

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