Clever Geek Handbook

Hide UIPageControl UIPageControlViewController at specific page index

I want to hide the page control indicator on a specific VC and instead show a button with the text "Get started". However, the user can still return to managing the page.

I've tried this:

self.pageController = [UIPageControl appearance];
self.pageController.pageIndicatorTintColor = [UIColor redColor];
self.pageController.currentPageIndicatorTintColor = [UIColor greenColor];

if(self.pageIndex == 1){
    self.pageController.hidden = YES;
    NSLog(@"hide you!");
}

However, this doesn't work. install self.pageController.hidden = YES

without if statement and also starts nslog. It seems like somehow this can only be set once.

I also don't know how smooth it will be. I obviously don't want it to change when the user fully arrives on the page itself, but in transition to it.

What is the best way to solve this problem?

+3


source to share


3 answers


I did it quickly, maybe it will help -



func setPageControlHidden (hidden: Bool)
{
    for subView in self.view.subviews
    {
        if subView is UIScrollView
        {
            subView.frame = self.view.bounds
        }
        else if subView is UIPageControl
        {
            subView.hidden = hidden
        }
    }
}
+2


source


I think you can set hidesForSinglePage to YES, this will reset the hidden property when there is more than one OpPages.



0


source


If you want to use the space that the UIPageControl is in, you can change the view frame so the page control leaves the screen:

func togglePageControl(visible: Bool) {
    if let pageVC = parent as? UIPageViewController {
        // find UIPageControl
        for case let control in pageVC.view.subviews where control is UIPageControl {
            let height = control.frame.height
            if visible {
                pageVC.view.frame.size.height -= height
            } else {
                pageVC.view.frame.size.height += height
            }
            break
        }
    }
}

Use it in the UIViewController you want with a hidden page control (checking for visibility is because viewWillAppear is called even when the user starts to navigate to another screen and then interrupts that action):

var isPageControlVisible = true

override func viewWillAppear(_ animated: Bool) {
    if isPageControlVisible {
        togglePageControl(visible: false)
        isPageControlVisible = false
    }
}

override func viewDidDisappear(_ animated: Bool) {
    togglePageControl(visible: true)
    isPageControlVisible = true
}
0


source






More articles:


All Articles