I upload my demo code here:https://github.com/liuxuan30/Problems
The main problem is, I had a view which have a scroll view inside, and there is a label and collection view inside scroll view.
There will be a unread message button generated by code, when there is unread messages, the button will pop out, and I expect the animation: label and collection view will down-shift by the button's height.
When I test the animation without adding the button in subviews, animate as expected.
When I add the button in, it seems like the label and collection view's origin.Y up-shifted, and start the animation. Turning off auto layout will solve it, but I have to have auto layout. I tried to add constraints for all views, but the animation still not work out.
You can try comment out
[self.HomeScrollView addSubview:AlertView]; and self.UnreadAlertView.alpha = 1.0f; inside the code to see the animation.
Hope someone could figure out where i did wrong.
UICollectionView is already a subclass of UIScrollView. Embedding your collection view inside a scroll view may be what is causing problems with your animation.
Try removing your scroll view and just put your UIButton, UILabel, and UICollectionView inside your overarching view.
Related
This is really odd, but I have a segmented controller and both of the views have a scroll view. So when you click on one half of the segmented controller that view has a scroll view, and the other half also has a scroll view. For some bizarre reason only one of the views will scroll. I need them both to scroll. Does this made sense?
First in the viewDidLoad I added a subview for both of them. Then I added an if else statement with .isHidden and that works beautifully.
I have a UIView that contains subviews that contains subviews...(Hierarchy of UIViews).
Every UIView is set with auto layout. When I press a button, this UIView is created and then I would like it to drop from the top of the screen.
The problem when I use layoutIfNeeded in an animation is that if will animate everything at the same time as it is a newly created UIView (not yet display).
My question is, is there a way to do the animation of only the UIView dropping with all the subviews already laid out in it?
I guess you can do it by creating the UIView when UIViewController displays and then hide it but I was wondering it there was another way.
Cheers
If you call layoutIfNeeded right after you add it to a view, while still outside the view, it should lay out it's views correctly. And then in the animation you call it again so the view animate to the final position.
I have a structure for my UIView object and have form elements within it. I run the application and the program is in such a way that when i click a button inside the UIView, it moves the current frame upwards. But thats not the problem.
My phonenumberfield is of type UITextField which is inside a UIView and that UIView is a part of the parent View. I have one button called submit and a segment control on the Parent UIView. But when i touch the phonenumberfield or any textfield type on the parent view, the parent view gets dismissed and keyboard shows up. Its weird I cant understand what the problem is because can't debug this. :(
I had a problem with the constraints for Auto Layout I had set for my scrollview and managed to fix the constraint and my view started scroll. To animate the view, I set a constant height from the top of the parent view and animated the view by changing the constant which did not affect the keyboard anymore.
I want to create layout similar to default Weather App in iOS. My view controller has UIView at top and UITableView below it. I want to resize dynamically top view while scrolling table view. I made view controller delegate of table view so I can resize top view while
scrollViewDidScroll(scrollView: UIScrollView)
is called.
The problem is that I want to disable scrolling of table view while resizing top view. Any ides? Or maybe my approach to this layout is wrong and I should use another one?
I also faced same problem as per mine problem, I used my UIView as a header of table view and used the AutoLayout in my View and if you want to disable the scrolling of your table view you can simply use a block for completion of your view resizing and you can disable scrolling of your table until your block will not give completion. Hope this solution will be helpful for you.
Here is the problem that I'm facing. I have UITableView inside main view. When user taps menu button, view is added to the view hierarchy of superview, and this view covers all screen, except the menu button. That is I call
[self.view insertSubview:self._menuView belowSubview:self._menuButton]
After user clicks the menu button again I call
[self._menuView removeFromSuperview]
However, after this, the UITableView stops scrolling, actually it scrolls, but just a little, couple of pixels, and then bounces back to the location on which it was before I inserted _menuView. I've monitored the menu hierarchy after inserting and removing the _menuView, it is actually removed, and also there is no view which covers the UITableVIew, so there is no chance that some other view steals touches from UITableView. What can be the problem? Any ideas?
EDIT 1: I've noticed besides not being able to scroll, another strange thing happens. When I show menuView, the tableView is scrolled to top, without animation. (the menuView is half opaque only, so I can see the tableView underneath it)
EDIT 2: I've monitored contentSize and contentOffset of tableView before and after inserting _menuView, the reason for not being able to scroll is that somehow contentSize is being changed.
TABLE VIEW BEFORE INSERTING MENU - contentSize:{Width=320, Height=10519} contentOffset:{X=0, Y=3980}
TABLE VIEW AFTER INSERTING MENU - contentSize:{Width=320, Height=44} contentOffset:{X=0, Y=0}
As You can see, the height is changed to 44 that's why I'm not able to scroll. And Also, as I've said in EDIT 1: tableView is scrolled to top - so as you can see contentOffset is also zeroed. Any ideas why content size changes automatically?
Thanks in advance.
i think there is problem with your tableview frame. right after removing subview, try to set frame of your tableview at its original frame.may this will solve your problem
Content in the UITableView organized automaically and designed only to show cells & header/footer elements. To proper working you should wrap your table into parentView and add your menu to that parentView rather than to the UITableView. You can also try to call reloadData method on table since it can restore the content size of the view.