我有两个 ViewController
VC1 将 VC2 作为子视图添加到自身。
VC2 有一个UIButton，它正在调用以下代码：
if([MFMailComposeViewController canSendMail]) {
MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
mailer.mailComposeDelegate = self;
[mailer setSubject:[NSString stringWithFormat:@"BlaBla."]];
NSArray *toRecipients = [NSArray arrayWithObjects:@"blabla@gmail.com", nil];
[mailer setToRecipients:toRecipients];
NSString *emailBody = [NSString stringWithFormat:@"Testtext1"];
[mailer setMessageBody:emailBody isHTML:NO];
[self presentViewController:mailer animated:YES completion:nil];
}
else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Fehler" message:@"Ihr Gerät unterstützt die gewünschte Funktion nicht" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[alert show];
}
邮件完成后，它会调用以下内容：
-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
switch (result)
{
case MFMailComposeResultCancelled:
{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hinweis"
message:@"Vorgang abgebrochen, es wurde keine E-Mail versendet."
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert show];
}
break;
case MFMailComposeResultSaved:
{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hinweis"
message:@"Ihre E-Mail wurde gespeichert."
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert show];
}
break;
case MFMailComposeResultSent:
{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hinweis"
message:@"Ihre E-Mail wird versendet."
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert show];
}
break;
case MFMailComposeResultFailed:
{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hinweis"
message:@"Vorgang abgebrochen, die E-Mail konnte nicht gesendet werden."
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert show];
}
break;
default:
{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hinweis"
message:@"E-Mail wurde nicht gesendet."
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert show];
}
break;
}
[self dismissViewControllerAnimated:YES completion:nil];}
一切正常，但 VC2 中的所有 UIButtons 等现在都被移动了，我猜，向下移动了 20 个像素。
我无法想象为什么，我想问题是我将一个 ViewController 作为 Subview 添加到另一个 ViewController 并在那里调用方法。但我无法想象如何解决这个问题。