iOS:显示MFMailComposer ViewController时崩溃

我只有一小段代码，它应该在调用时显示一个包含特定细节的邮件视图

 [self presentViewController:controller animated:YES completion:NULL];

应用程序崩溃，表示

thread1:breakpoint1.1

我不确定是什么导致了这次车祸。我在下面提供代码

NSString* encryptedText = [self getEncryptedText:noteText.text :cipherField.text];

MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init]; controller.mailComposeDelegate = (id)self;

[controller setSubject:titleField.text];
[controller setMessageBody:encryptedText isHTML:NO];

[self presentViewController:controller animated:YES completion:NULL];

---

谢谢

在创建

MFMailComposeViewController

之前，请确保通过添加

if ([MFMailComposeViewController canSendMail]) {

    //Place your code here to create the controller and present

}

如果您试图在尚未设置邮件的设备上显示

MFMailComposeViewController

，则应用程序将崩溃。添加此条件将检测此情况

---

希望这有助于…

在创建

MFMailComposeViewController

之前，请确保通过添加

if ([MFMailComposeViewController canSendMail]) {

    //Place your code here to create the controller and present

}

如果您试图在尚未设置邮件的设备上显示

MFMailComposeViewController

，则应用程序将崩溃。添加此条件将检测此情况

希望这有帮助…

试试这段代码

if ([MFMailComposeViewController canSendMail]) {
        MFMailComposeViewController *composeViewController = [[MFMailComposeViewController alloc] initWithNibName:nil bundle:nil];
        [composeViewController setMailComposeDelegate:self];
        [composeViewController setToRecipients:@[@""]];
        [composeViewController setSubject:@"Hi Test"];
        [composeViewController setMessageBody:@"Hello Test" isHTML:YES];

        [self presentViewController:composeViewController animated:YES completion:nil];

    }

试试这个代码

if ([MFMailComposeViewController canSendMail]) {
        MFMailComposeViewController *composeViewController = [[MFMailComposeViewController alloc] initWithNibName:nil bundle:nil];
        [composeViewController setMailComposeDelegate:self];
        [composeViewController setToRecipients:@[@""]];
        [composeViewController setSubject:@"Hi Test"];
        [composeViewController setMessageBody:@"Hello Test" isHTML:YES];

        [self presentViewController:composeViewController animated:YES completion:nil];

    }

---

尝试

[自我呈现视图控制器：控制器动画：是完成：无]尝试
[自我呈现视图控制器：控制器已设置动画：是完成：无]谢谢。这就解决了问题。它可以在我的iPhone上运行，但我不明白为什么它不能在家庭iPad上运行。非常感谢，谢谢。这就解决了问题。它可以在我的iPhone上运行，但我不明白为什么它不能在家庭iPad上运行。多谢各位。