MFMailComposeViewController black screen on iPad - ios

Question

I'm using cocos2d-x framework and I need to popup the mail when clicking button.
The code works fine on iphone5 (6.0), ipod touch 5(6.0):
MailSender.h
#interface MailSender : UIViewController <MFMailComposeViewControllerDelegate>
{
UIViewController *currentModalViewController;
}
-(void)sendMail:(const char *)subject receiver:(const char *)receiver;
#end
MailSender.mm
#import "MailSender.h"
#import "../cocos2dx/platform/ios/EAGLView.h"
#implementation MailSender
- (void)sendMail:(const char *)subject receiver:(const char *)receiver
{
if ([MFMailComposeViewController canSendMail])
{
MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
mailer.mailComposeDelegate = self;
[mailer setSubject:[NSString stringWithUTF8String:subject]];
NSArray *toRecipients = [NSArray arrayWithObject:[NSString stringWithFormat:#"%s", receiver]];
[mailer setToRecipients: toRecipients];
//NSString *emailBody = [NSString stringWithFormat:#"<p>This is a sample posting in iOS. My Score is %s!</p>",score];
NSString *emailBody = #"";
[mailer setMessageBody:emailBody isHTML:YES];
// only for iPad
// mailer.modalPresentationStyle = UIModalPresentationFormSheet;
UIViewController* rootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;
currentModalViewController = [UIViewController alloc];
[rootViewController.view addSubview:currentModalViewController.view];
[currentModalViewController presentViewController:mailer animated:true completion:nil];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Failure"
message:#"Your device doesn't support the composer sheet"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles: nil];
[alert show];
[alert release];
}
}
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
const char *message;
switch (result)
{
case MFMailComposeResultCancelled:
message = "Mail cancelled";
break;
case MFMailComposeResultSaved:
message = "Mail saved";
break;
case MFMailComposeResultSent:
message = "Mail send";
break;
case MFMailComposeResultFailed:
message = "Mail failed";
break;
default:
message = "Mail cancelled";
break;
}
NSLog(#"%s",message);
[currentModalViewController dismissViewControllerAnimated:true completion:nil];
[currentModalViewController.view.superview removeFromSuperview];
[currentModalViewController release];
}
#end
But on my ipad mini (6.0) the mail popped up correctly but when clicked the "send mail" or "cancel" the view was removed and leaving a black screen (everything on the screen is gone)
Any advice will be appreciated, thanks :)

Answer 1

try this code
if ([MFMailComposeViewController canSendMail]) {
mailComposer = [[MFMailComposeViewController alloc]init];
mailComposer.mailComposeDelegate = self;
[mailComposer setToRecipients:#[#"yourmail#com"]];
[mailComposer setSubject:#"Subject"];
[mailComposer setMessageBody:#"hello \n" isHTML:NO];
[self presentViewController:mailComposer animated:YES completion:nil];
}
else{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:#"Error"
message:#"can not send mail with this device"
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil, nil];
[alert show];
}
pragma mark MFMailComposeViewControllerDelegate
-(void)mailComposeController:(MFMailComposeViewController *)controller
didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
if (result) {
NSLog(#"Result : %d",result);
}
if (error) {
NSLog(#"Error : %#",error);
}
[self dismissViewControllerAnimated:YES completion:nil];
}

Answer 2

I'm using this code for feedback via email in my cocos2d-x game.
Application::getInstance()->openURL("mailto:" + SUPPORT_EMAIL);
You can add subject:
Application::getInstance()->openURL("mailto:" + SUPPORT_EMAIL + "?subject=Hello from NX");
This solution tested on iOS and Android.