UIActionSheet 打開郵件應用程序 iPhone

Question

這個問題讓我很困惑，所以希望有人能提供幫助。 我在一個視圖上有一個 UIActionSheet，其中包含三個選項。一個將我的用戶帶到一個新視圖，一個通過 email 共享，一個通過 SMS 共享。

我創建了 UIActionSheet，它可以正常工作，AlertSheet 的新視圖部分也可以工作。 我已經導入了 Message.UI 框架並設置了郵件和 SMS 選擇器和作曲器，這些都很好。 但是，我無法在 UIActionSheet 上設置兩個“按鈕”來打開郵件和 SMS。

通常我會通過界面生成器執行此操作，並將 UIButton 連接到我創建的操作，但因為這是 UIActionSheet，所以不能那樣做。 很抱歉代碼很長，但我覺得我需要顯示所有內容，所以請參見下文；

-(IBAction)showActionSheet {
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose an Option" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Application Support",@"Share Via Email",@"Share Via SMS",nil];
    [actionSheet showInView:self.view];
    [actionSheet release];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if(buttonIndex == 0) {
    AppSupportView *controller = [[AppSupportView alloc] initWithNibName:@"AppSupportView" bundle:nil];
    controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:controller animated:YES];
    [controller release];
    }

    if(buttonIndex == 1) {

    }

    if(buttonIndex == 2) {

    }

}

- (void)dealloc {
    [feedbackMsg release];
    [super dealloc];
}

- (void)viewDidUnload {
    self.feedbackMsg = nil;
}

-(IBAction)showMailPicker:(id)sender {
    // The MFMailComposeViewController class is only available in iPhone OS 3.0 or later. 
    // So, we must verify the existence of the above class and provide a workaround for devices running 
    // earlier versions of the iPhone OS. 
    // We display an email composition interface if MFMailComposeViewController exists and the device 
    // can send emails. Display feedback message, otherwise.
    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));

    if (mailClass != nil) {
        //[self displayMailComposerSheet];
        // We must always check whether the current device is configured for sending emails
        if ([mailClass canSendMail]) {
            [self displayMailComposerSheet];
        }
        else {
            feedbackMsg.hidden = NO;
            feedbackMsg.text = @"Device not configured to send mail.";
        }
    }
    else    {
        feedbackMsg.hidden = NO;
        feedbackMsg.text = @"Device not configured to send mail.";
    }
}

-(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 {  
            feedbackMsg.hidden = NO;
            feedbackMsg.text = @"Device not configured to send SMS.";

        }
    }
    else {
        feedbackMsg.hidden = NO;
        feedbackMsg.text = @"Device not configured to send SMS.";
    }
}

// Displays an email composition interface inside the application. Populates all the Mail fields. 
-(void)displayMailComposerSheet 
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;

    [picker setSubject:@"My BMR Index Rating from Total:Health App"];


    // Set up recipients
    //NSArray *toRecipients = [NSArray arrayWithObject:@""]; 

     //[picker setToRecipients:toRecipients];
    NSString *emailSharing = @"I Just discovered that I have a Target Heart Rate of";
    // Fill out the email body text
    [picker setMessageBody:emailSharing isHTML:YES];

    [self presentModalViewController:picker animated:YES];
    [picker release];
}

// Displays an SMS composition interface inside the application. 
-(void)displaySMSComposerSheet 
{
    MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];
    picker.messageComposeDelegate = self;
    NSString *SMSShare = @"I Just discovered that I have a Target Heart Rate of";
    // Fill out the email body text
    picker.body = SMSShare;

    [self presentModalViewController:picker animated:YES];
    [picker release];
}

// Dismisses the email composition interface when users tap Cancel or Send. Proceeds to update the 
// message field with the result of the operation.
- (void)mailComposeController:(MFMailComposeViewController*)controller 
          didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {

    feedbackMsg.hidden = NO;
    // Notifies users about errors associated with the interface
    switch (result)
    {
        case MFMailComposeResultCancelled:
            feedbackMsg.text = @"Result: Mail sending canceled";
            break;
        case MFMailComposeResultSaved:
            feedbackMsg.text = @"Result: Mail saved";
            break;
        case MFMailComposeResultSent:
            feedbackMsg.text = @"Result: Mail sent";
            break;
        case MFMailComposeResultFailed:
            feedbackMsg.text = @"Result: Mail sending failed";
            break;
        default:
            feedbackMsg.text = @"Result: Mail not sent";
            break;
    }
    [self dismissModalViewControllerAnimated:YES];
}


// Dismisses the message composition interface when users tap Cancel or Send. Proceeds to update the 
// feedback message field with the result of the operation.
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller 
                 didFinishWithResult:(MessageComposeResult)result {

    feedbackMsg.hidden = NO;
    // Notifies users about errors associated with the interface
    switch (result)
    {
        case MessageComposeResultCancelled:
            feedbackMsg.text = @"Result: SMS sending canceled";
            break;
        case MessageComposeResultSent:
            feedbackMsg.text = @"Result: SMS sent";
            break;
        case MessageComposeResultFailed:
            feedbackMsg.text = @"Result: SMS sending failed";
            break;
        default:
            feedbackMsg.text = @"Result: SMS not sent";
            break;
    }
    [self dismissModalViewControllerAnimated:YES];
}

@end

問題顯然是我不知道如何繼續使用 (if buttonIndex ==1) 等代碼來打開郵件和短信

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if(buttonIndex == 0) {
    AppSupportView *controller = [[AppSupportView alloc] initWithNibName:@"AppSupportView" bundle:nil];
    controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:controller animated:YES];
    [controller release];
    }

    if(buttonIndex == 1) {

    }

    if(buttonIndex == 2) {

    }

}

任何幫助，將不勝感激。

謝謝

Answer 1

看起來你需要的所有方法都已經有了..只需添加[self showMailPicker:nil]或[self showSMSPicker:nil]到

if(buttonIndex == 1) {

}

if(buttonIndex == 2) {

}

如果您從頂部開始的第二個按鈕是您的短信按鈕，請將 showSMSPicker 添加到 buttonIndex == 1