iOS-如何使用initWithViewController定位“父” viewcontroller

Question

I would like to use a method in a viewcontroller that is the "container" of an other viewcontroller but not directly the parent. I display a popover containing a custom xib file. For that I have three viewcontrollers:

1) popoverVC managing the settings of the popover (like alpha value, any arrow, size, and the method I want to use from "outside" dismisspopover)

2) customVC with a xib file to change the content of my popover (some text and some buttons).

3) mainVC from where the popover is launched and where I receive some actions when interacting with my buttons in customVC. mainVC is the delegate of customVC.

My problem is I don't know of to call dismisspopover method in popoverVC from an action in customVC. At the very beginning I initialize my customVC like this from mainVC:

mainVC.m

    customVC *cvc = [[customVC alloc] init];
    [cvc setDelegate:self];

    PopoverController *popover = [[PopoverController alloc] initWithViewController:cvc];
    [popover presentPopoverFromView:textField];

I tried to instantiate a new instance of popoverVC inside my action method in customVC to be able to call the method [popoverdismiss]. But this should not be working since I will be targeting a different instance from the one I started with... And I would like to be able to target popoverVC like [self.presentingVC] but I am not sure the method initWithVC sets a hierarchy like this.

Does anyone has an idea?

Answer 1

The way I usually go about having to circumvent the default view controller hierarchy is to create a property within your child view controller (I think customVC ) called parent or something to that effect that's of type mainVC . Then either create a new initializer for your customVC that incorporates a field to assign to parent or just assign to it after you first initialize your customVC . Then whenever your customVC needs to ask the mainVC to perform a function, you can make a method call from parent .

Alternatively, you could just as easily make parent correspond to your popoverVC object, I'm not totally sure which object you need to access, but it should be as simple as creating your own property for it.