iPhone – Call RootViewController to switch views in the content view (iOS)

@class RootViewController;

@interface MyContentViewController: NSObject {
@private
 RootViewController *rootViewController;
}

@property (retain) RootViewController *rootViewController;

@implementation MyContentViewController

@synthesize rootViewController;< br />
- (IBAction) switchView:(id) sender {
 [rootViewController switchToNextView];
}

-(void) dealloc {
 [rootViewController release];
 [super dealloc];
}

self.contentViewController = [ [[MyContentViewController alloc]
 initWithNibName:@"ContentView" 
 bundle:nil] autorelease];
self.contentViewController.rootViewController = self;

I am making a very simple multi-view application for iOS, and I have been following a great tutorial in the Apress book. I Basically my rootViewController has been instantiated and displayed with the app delegate, and I have a lot of content viewControllers(6) I want to swap in and out based on user input. However, in this book, they use Interface Builder’s toolbar on the rootView Execute switch on it. It triggers a method in rootView that loads the new content ViewController and displays it.

My problem is that I want to perform content view switching (located in my rootViewController instance) , But I want to use the button in my content view to trigger the switch operation (so it is not available as my file owner) is my contentViewController, and its reference is saved in my rootViewController.

I hope I have Very well explained, please tell me if I should elaborate. I appreciate any help!

When you create a content view in a custom init method, or just assign it after the content view is created, you need to pass to the root view controller ( RootViewController * rootViewController) reference: self.contentView.rootViewController = self;.

Now, in the content view, you can call the corresponding method in the root view controller to perform the switch:[ self.rootViewController switchView]. Then you can trigger this call (IBAction method) within the method that is called when the button is pressed.

So this is what you need to do:
1) In the RootViewController type content Create a property in the view controller

@class RootViewController;

@interface MyContentViewController: NSObject {
@private
 RootViewController *rootViewController;
}

@property (retain) RootViewController *rootViewController;

and make sure it keeps the reference.
2) Synthesize the properties and add the callback to Switch the root view controller of the view:

@implementation MyContentViewController

@synthesize rootViewController;

- (IBAction) switchView :(id) sender {
 [rootViewController switchToNextView];
}

-(void) dealloc {
 [rootViewController release];
 [super dealloc ];
}

At the same time, publish your reserved reference at the end.

3) Assign the root view controller to the content view in RootViewController:< /p>

self.contentViewController = [[[MyContentViewController alloc]
 initWithNibName:@"ContentView" 
 bundle:nil] autorelease];
self. contentViewController.rootViewController = self;

This should be all. I hope to help you.