试图发送邮件和应用程序崩溃

Question

我试图使用FMailComposeViewController发送电子邮件。当我尝试通过调用presentModalViewController发送邮件时，应用程序崩溃。在仿真R中，它在设备上的所有时间都会崩溃，只有一半时间会崩溃。

我没有得到一个错误消息，但应用程序冻结和debuuger表明它打算 INT主（INT ARGC，CHAR *的argv []）{ @autoreleasepool { 回报UIApplicationMain（ARGC，ARGV，零， NSStringFromClass（[AppDelegate class]））; } } 应用程序总是在模拟器中崩溃，大约有一半时间在iPhone上。

代码：

- (IBAction)aEmail:(id)sender { 
if([MFMailComposeViewController canSendMail]){ 

    MFMailComposeViewController *mailCtrl = [[MFMailComposeViewController alloc] init]; 
    [mailCtrl setSubject:@"Your TellaFortune Card Reading"]; 
    [mailCtrl setToRecipients:[NSArray arrayWithObject:@"tedpottel@yahoo.com"]]; 
    mailCtrl.mailComposeDelegate = self; 

    [mailCtrl setMessageBody: @"hello" isHTML: false]; 

// CRASHES ON THID LINE 
    [self presentModalViewController:mailCtrl animated:NO]; 
    //  [mailCtrl release]; 

} 
else 
{ 
    UIAlertView *alert=[[ UIAlertView alloc] 
         initWithTitle:@"Cannot send email" 
         message: @"Please check internet connection and email set up" 
         delegate: self 
         cancelButtonTitle:@"Ok" 
         otherButtonTitles: nil]; 

    [alert show]; 
} 

} 

/////////////////////////////////////////////////////////////////////////////////////////// 
// if you do not have thid methed when sending emsil, app will freez after 
// sent or cancel button has been pressed. 

- (void)mailComposeController:(MFMailComposeViewController *)controller 
     didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { 
[self dismissModalViewControllerAnimated:YES]; 
NSLog(@"Email result: %@", result==MFMailComposeResultCancelled?@"Cancelled": 
     result==MFMailComposeResultSaved?@"Saved": 
     result==MFMailComposeResultSent?@"Sent": 
     result==MFMailComposeResultFailed?@"Failed":@"Unknown"); 
} 

Answer 1

把mailctrl在伊娃 - 你没有很强的参考现在。