Question

This is probably a really simple question and I apologise if it is!!

I have a view controller based application, I move from 1 xib to another using

        mainviewcontroller = [[MainViewController alloc]  initWithNibName:@"MainViewController" bundle: [NSBundle mainBundle]]; 
    [self.view addSubview: mainviewcontroller.view]; 

When I return back to the original view I just use

[self.view removeFromSuperview]; 

But I want to re-call the viewdidload method. How can I do this without having to create the view again?

Answer 1

addSubview is not the correct way to have a new view controller take over and present it’s view set.

Use something like this instead:

MainViewController *mainviewcontroller = [[MainViewController alloc]  initWithNibName:@"MainViewController" bundle: [NSBundle mainBundle]]; 
[self presentViewController:mainviewcontroller animated:YES completion:completion:^{}];
[mainviewcontroller release];

If you are using storyboards, you could always create a segue and call it programmatically or set up through the storyboard itself.

To support pre-iOS 5 devices UIViewController also has an older method (which was deprecated in iOS5 and replaced by my original suggestion).

- (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated