when MBProgressHUD is added to self.navaigationController.view, it conflicts with self.nanavaigationController presentViewController

[MonkeyS914]

the program will break in this part, xcode says the view is nil

• (id)initWithView:(UIView *)view {

  NSAssert(view, @"View must not be nil.");

  return [self initWithFrame:view.bounds]; }

[matej]

If the view is nil here, than you're doing something wrong.

[MonkeyS914]

i just add the method in the rootviewcontroller

• (void)initHUD{

  RootHud = [[MBProgressHUD alloc] initWithView:self.view];

  [self.navigationController.view addSubview:RootHud];

  RootHud.customView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"error"]];

  // Set custom view mode

  RootHud.mode = MBProgressHUDModeCustomView;

  RootHud.delegate = self;

}

and use the [self presentViewController:modelViewController animated:YES completion:nil];

in a viewController class which inherits from rootViewController

i try to find the reason but failed. if this isn't a bug, i will try to check my code to find out where the nil comes from

[matej]

I guess self.view is nil when you call that initHUD method.

[MonkeyS914]

thank you for your instructions