如何在UiView上添加新的UIViewCOntroller

Question

I have added subview in a UIViewController and I want a new UIViewController Should be loaded on click of button.

Challenge is I am not able to use button in new UIViewController .

Code which I have write:

DetailsOfDayViewController *aViewController =[[DetailsOfDayViewController alloc] initWithNibName:@"DetailsOfDayViewController" bundle:nil];
aViewController.dateParsing = dateparsing;
[self addSubview:aViewController.view];

Answer 1

For showing another controller you can following options

1. Add SubView

 newViewControllerObj.view.frame = oldViewControllerObj(self).view.frame
  [oldViewControllerObj(self).view.newViewControllerObj.view];

2. Present

  [oldViewControllerObj(self) presentViewController: newViewControllerObj animated:YES completion:nil];

3. Push using Navigation (For this you already have to set navigation controller as root controller)

  [oldViewControllerObj(self).navigationController pushViewController:newViewControllerObj animated:YES];

Answer 2

This will fix your issue. This is happening because your view controller is being deallocated when you don't have any strong pointers on it.

DetailsOfDayViewController *aViewController =[[DetailsOfDayViewController  alloc] initWithNibName:@"DetailsOfDayViewController" bundle:nil];
aViewController.dateParsing = dateparsing;
[self addChildViewController:aViewController];
[self addSubview:aViewController.view];

Another fix will be connecting this view controller to a property:

@property(nonatomic,strong) DetailsOfDayViewController *aViewController;

And change your code like this:

self.aViewController = [[DetailsOfDayViewController  alloc] initWithNibName:@"DetailsOfDayViewController" bundle:nil];
self.aViewController.dateParsing = dateparsing;
[self addSubview:self.aViewController.view];