Question

Bit confused with this one so bear with me…

I have a Navigation-based project which is working fine. I’m trying to create my first custom UIView to make a couple of buttons which I will use in multiple places. One of the buttons needs to push a viewcontroller into the navigation when it’s clicked but I’m not sure how to do this.

When I had the button set up within a view controller I was using:

LocationViewController *controller = [[LocationViewController alloc] initWithNibName:@"LocationViewController" bundle:nil];
        [self.navigationController pushViewController:controller animated:YES];
        [controller release];

but the self.navigation controller won’t work now, will it? How do I access the navigation controller of the viewcontroller that this uiview will be added to?

Hope at least some of that makes sense, as I said it’s my first go at subclassing the uiview and adding it to multiple pages so I’m a bit lost.

EDIT TO ADD – I have the button click events inside the custom UIView, so that is where I’m trying to change the viewcontroller from. Should I instead wire up the events in whichever viewcontroller I add the view to?

Answer 1

Usually your appDelegate has a UINavigationController property. You can access it in your custom view like this:

UINavigationController *navController = (MyAppDelegate *)[[[UIApplication sharedApplication] 
         delegate] navigationController];

But more effective way is to make delegate method for your custom view and handle button action in your viewController.

MyCustomView.h

    @protocol MyCustomViewDelegate 
    @interface MyCustomView : UIView  {
        id<MyCustomViewDelegate>    cvDelegate; }
    @property(nonatomic, assign) id<MyCustomViewDelegate>   cvDelegate;

    @protocol MyCustomViewDelegate @optional
    -(void)didClickInCustomView:(MyCustomViewDelegate*)view withData:(NSObject*)data; 
    @end

MyCustomView.m

    - (void)myButtonClick:(id)sender 
    { 
        [self.cvDelegate didClickInCustomView:self withData:someData];  
    }

So now you can handle this event in any place where is your custom
view.