UITableView not animating when sibling is a UIPageViewController - ios

Question

I have a view controller which has a UITableView and a UIPageViewController. The UITableView's height is set to 0 at first. Upon clicking a button, the tableview should slide down(i.e., increase in height) and the PageViewController should be pushed down. I have done it like this...
float yPos = 61;
CGRect fr2 = self.pageController.view.frame;// UIPageViewController
CGRect fr1 = self.categoriesTable.frame; // UITableView
if (self.categoriesTable.frame.size.height == 0.0){
fr1.size.height = 44 * self.categories.count + 20; // categories is a datasource
yPos = yPos + 44 * self.categories.count + 20;
}else{
fr1.size.height = 0.0;
}
fr2.origin.y = yPos;
[UIView animateWithDuration:0.3 animations:^{
self.pageController.view.frame = fr2;
self.categoriesTable.frame = fr1;
}];
Expected Behavior: The tableview and the pageviewcontroller should both slide down at the same time.
Observed Behavior: Only the pageviewcontroller slides down. There is no change in table view's frame. However if you execute this method once again, then the Tableview slides down.
Can anyone help me with this ? Let me know if you need more information/code.

Answer 1

Ok, Looks like I fixed it. I decided to translate the pageviewcontroller back and forth to achieve the same effect. Below is the working code.
float yPos = 0;
CGRect fr2 = self.pageController.view.frame;
CGRect fr1 = self.categoriesTable.frame;
if (self.categoriesTable.frame.size.height == 0.0){
fr1.size.height = 44 * self.categories.count + 20;
yPos = 44 * self.categories.count + 20;
}else{
fr1.size.height = 0.0;
}
fr2.origin.y = yPos;
[UIView animateWithDuration:0.3 animations:^{
self.pageController.view.layer.affineTransform = CGAffineTransformMakeTranslation(0, yPos);
self.categoriesTable.frame = fr1;
}];