xcode storyboard Container View - How do I access the viewcontroller

Question

I\'m trying to use storyboard and get things working properly. I\'ve added a a Container View to one of my existing views. When I try to add a reference to this in my view c

Answer 1

The answer of Vitor Franchi is correct but could be more performant and convenient. Especially when accessing the child view controller several times.

Create a readonly property

@interface MyViewController ()
@property (nonatomic, weak, readonly) InstallViewController *cachedInstallViewController;
@end

Then create a convenient getter method

- (InstallViewController *)installViewController
{
    if (_cachedInstallViewController) return _cachedInstallViewController;

    __block InstallViewController *blockInstallViewController = nil;
    NSArray *childViewControllers = self.childViewControllers;
    [childViewControllers enumerateObjectsUsingBlock:^(id childViewController, NSUInteger idx, BOOL *stop) {

        if ([childViewController isMemberOfClass:InstallViewController.class])
        {
            blockInstallViewController = childViewController;
            *stop = YES;
        }
    }];

    _cachedInstallViewController = blockInstallViewController;

    return _cachedInstallViewController;
}

From now on access the child view controller that way

[self.installViewController doSomething];