I have a UIScrollView that contains a few custom UIViews that I can drag around by implementing the touchesMoved method. However, I need to be able to drag this custom view out of the scroll view and have it added to a custom UIView that is to function as a sort of dock for the view that is being dragged.
How would I go about implementing this? As soon as I remove the custom draggable view from its superview, it disappears (understandably). Thank you.
You have to have the view as a subview of the same view at the beginning and end of the drag.
In order to have it as a subview of another subview of this main view, you would have to destroy and recreate it at the appropriate place. You could do this both at the beginning and at the end of the drag process.
Related
I'm using a scroll view in the storyboard for one of my view controllers and I would like to know if there is a way to move the current view of the view controller down so that I can add things below.
I've seen that when tapping on CollectionView (which is at the bottom of my screen and extends below the view), the view on my viewcontroller seems to move down a bit to reveal more of the CollectionView, but not entirely. Is there a way that I can make the view go lower?
Change the size of viewController as shown in the image below:
What is the most elegant/ cleanest way to add a custom UIView sliding from the bottom of the screen?
Should I create custom UIView in its own xib and then add it below the view and animate it or is there a better way?
I currently have an NSPopover subclass which sets it content view controller to a custom NSViewController meant to represent a tab view:
self.popover.contentViewController = tabViewController;
self.popover.animates = YES;
I'm rolling my own "tab view controller" because I've heard that NSTabViewController doesn't play well with animations. I'd like to use auto layout so I don't think I want to mess around with the popover's contentSize property. When I change tabs the popover correctly changes its size, however, it doesn't animate the change. Furthermore, I have a cross-fade animation that occurs when the tab view switches and the popover doesn't resize until after the animation finishes.
First, I'd like to figure out how to get the popover resize to animate and then I'll worry about getting the animation in sync.
Thanks
Say I have a custom UIImageView with several subviews.
In a UIViewController, if I create the custom imageView and add it as a subview to self.view, does that mean all the custom view's subviews will display on the screen, or just the custom view without its subviews?
The whole view hierarchy: the current view, it's subviews, their subviews, and so on, will be added to self.view's view hierarchy.
I've created a custom subclass of UIViewController that acts like a UINavigationController or a UITabBarController. Let's call it a ToolbarNavController. It has a toolbar at the bottom with controls for the user to move to a different content view.
I have two content views aside from the ToolbarNavController's view. Both are loaded from a nib and have their own controllers. The app starts out showing one of them. A button in the toolbar allows the user to switch between them.
When I add these views as subviews of the ToolbarNavController's views in viewDidLoad, they are correctly resized to fill the area between the status bar and the toolbar without overlap/underlap.
But when I try to lazy load the second view, adding it as a subview for the first time only when the user presses the toolbar button, iOS does not resize the view to account for the toolbar in its parent view, and it underlaps the toolbar which messes up my Autolayout constraints. Also, when I don't add the subview in viewDidLoad, if I put the device in landscape orientation before switching to the second view, it loads with a portrait orientation frame.
Bottom line: When inserting a subview in viewDidLoad, iOS sizes it correctly and manages autorotation for it. When inserting it later, I need to detect orientation set the frame myself. (And for some reason when I do this, autorotation kicks in again).
What is going on?
In viewDidLoad, the view is not yet layout for the resolution and interface orientation, and view properties are as they were in the interface designer. So, if you had a portrait view, that is how the initial properties of the view are set when going into viewDidLoad. When you add your view there, you add it to the XIB view. Later, iOS performs layout on the view hierarchy and thus resizes your inserted view as needed. But when adding your view at a later point, the view hierarchy has already been layout, so it is expected that the new view you are adding is also layout correctly.
Best practice is to calculate the size you need using the size of the view you are inserting into. For example, half the width of the containing view, or third the bounds, etc. This way it is independent on the orientation the interface is in.