how to access viewpager method from childviewcontroller

[raitmoon]

Hello,

I have a question. I want to know how to call viewpager's selectTabAtIndex method from childviewcontroller. I tried as below but it could not work.

if ([self.parentViewController isKindOfClass:[ViewPagerController class]]) {
    ViewPagerController *vc = (ViewPagerController *)self.parentViewController;
    [vc selectTabAtIndex:0];
}

Can you please give me any clue?

[dhgillani]

This method will help you

pragma mark - ViewPagerDelegate

• (CGFloat)viewPager:(ViewPagerController *)viewPager valueForOption:(ViewPagerOption)option withDefault:(CGFloat)value {

  switch (option) { case ViewPagerOptionStartFromSecondTab: return 0.0; case ViewPagerOptionCenterCurrentTab: return 1.0; case ViewPagerOptionTabLocation: return 0.0; case ViewPagerOptionTabHeight: return 49.0; case ViewPagerOptionTabOffset: return 36.0; case ViewPagerOptionTabWidth: return UIInterfaceOrientationIsLandscape(self.interfaceOrientation) ? 128.0 : 96.0; case ViewPagerOptionFixFormerTabsPositions: return 1.0; case ViewPagerOptionFixLatterTabsPositions: return 1.0; default: return value; } }

[raitmoon]

Dhgillani, thanks for your comment. But I can not figure out, can you explain a bit more?

[raitmoon]

Sorry my question may not be good. It seems the parent view controller of the child view controller is not viewpagercontroller. And my program does not go into "if clause".

[iltercengiz]

Hey there, sorry for late reply. It won't work because view pager passes the content view controllers to UIPageViewController and as far as I know it doesn't add itself as parent view controller to the presented view controllers. One way to achieve your goal is adding a weak property to the content view controllers and assigning ViewPagerController subclass to it. This way you will be able to send messages to your ViewPagerController subclass to change its tab.

[raitmoon]

Hello, iltercengiz

Thanks for your reply! I could have done it as you adviced me.

Thank you