Ios 视图控制器崩溃-新手

我的iOS视图控制器因下面的此方法而崩溃（

skipRegistration

）。它过去可以工作，但现在每当苹果试图批准该应用程序时，它都会失败。有没有一种方法可以让我看到问题所在，或者调试崩溃的确切原因

代码：

我的堆栈跟踪在这里

完整堆栈跟踪：

0芯基础0x181d79e48+132 1 libobjc.A.dylib 0x1929c80e4_objc_exception_throw +60 2 UIKit 0x18683ea40-[UIViewController\u presentViewController:带动画控制器：完成：+3376 3 UIKit 0x1868408dc+120 4
UIKit 0x1866160b4-[UIVIEW控制器 presentViewController:动画：完成：:+216

---

您的

skippregration

的最后一行似乎是罪魁祸首，视图是如何呈现的？我会把你的注意力集中在这里

你测试过应用的发布版本吗？首先，你应该得到异常消息。

@interface MPRegisterViewController ()

@property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;

@end

@implementation MPRegisterViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle   *)nibBundleOrNil
{
   self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
   if (self) {
      // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
   [super viewDidLoad];
   self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

   // for CoreData
   MPAppDelegate *appDelegate = [UIApplication sharedApplication].delegate;
   self.managedObjectContext = appDelegate.managedObjectContext;

   self.firstName.delegate = self;
   self.lastName.delegate = self;
   self.email.delegate = self;
   self.telephone.delegate = self;
}

- (void)didReceiveMemoryWarning
{
   [super didReceiveMemoryWarning];
   // Dispose of any resources that can be recreated.
}


#pragma mark - Navigation
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[self.firstName resignFirstResponder];
[self.lastName resignFirstResponder];
[self.email resignFirstResponder];
[self.telephone resignFirstResponder];

return NO;
}

- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
switch (result)
{
    case MFMailComposeResultCancelled:
        NSLog(@"Mail cancelled");
        break;
    case MFMailComposeResultSaved:
        NSLog(@"Mail saved");
        break;
    case MFMailComposeResultSent:
        NSLog(@"Mail sent");
        break;
    case MFMailComposeResultFailed:
        NSLog(@"Mail sent failure: %@", [error localizedDescription]);
        break;
    default:
        break;
}

// Close the Mail Interface
[self dismissViewControllerAnimated:YES completion:NULL];
}


- (IBAction)skipRegistration:(id)sender {

[[NSUserDefaults standardUserDefaults] setValue:@"skippedit" forKey: @"SkippedIt"];
[[NSUserDefaults standardUserDefaults] synchronize];

[self dismissViewControllerAnimated:NO completion:NULL];
}
@end