When I add a custom NSView to my NSScrollView via documentView and resize the window the content sticks always to the bottom of the window (so the scroll view is always scrollt to the bottom when the window is resized).
Is there a way to keep the scroll view scrolled to the top when the window is resized?
Edit: Uploaded reproducible example:
https://github.com/nathasmike/sample1
The autoresizing mask of the custom view is translated into constraints. To prevent this do
myCustomView.translatesAutoresizingMaskIntoConstraints = false
myScrollView.documentView = myCustomView
Add constraints to the custom view and its subviews.
Another solution is removing the autoresizing mask from the custom view in the xib.
Related
I have a ViewController that has a UIScrollView with a vertical UIStackView on top of it.
Everything works fine if i add UIView to the stackview with height constraint trough the interface builder. For example 3 views with height 600px. If i run the app, i can scroll with no problem and see all three added views. The for the stackview works fine.
If i try to add a view to the stackview with code with addArrangedSubView trough code i can see that the first view that i added if i "force" scroll down, but not the other two. It doesnt matter if i set height constraints to the views that i add, and it doesnt matter if i set intrinsicContentSize for the custom views.
How can i get the scroll view to expand the scroll area when adding trough code. ?
Thanks :)
Just a guess in lack of more information:
The issue may be related to the way constraints are set up between the scroll view and its child, the stack view.
you should add the following constraints:
fix stack view edges (top, leading, trailing, bottom) to scroll view
set width constraint between stack view and scroll view
also set height constraint between stack view and scroll view, set its priority to low (250)
For more insights please read up on "setup UIStackView with auto layout", for example here:
https://medium.com/#pradeep_chauhan/how-to-configure-a-uiscrollview-with-auto-layout-in-interface-builder-218dcb4022d7
If it doesn't work please provide the relevant code and screenshots of your Interface Builder setup.
I have a TableView inside a ViewController.
I made the TableView stretch to the View SuperMargings (with constraints) and disabled all SafeArea Inset options but my TableView is still under the SafeArea when I run my project.
How can I make my TableView go full height on iPhones with notch?
If you have already pinned tableView to it's superview(not to safeArea) with constraints but tableView still respects safeArea there is property contentInsetAdjustmentBehavior in UIScrollView(UITableView is subclass of UIScrollView as we know) since iOS 11.
This property is UIScrollView.ContentInsetAdjustmentBehavior enum with 4 options.
You need to set .never to contentInsetAdjustmentBehavior.
What works with any view is to associate the bottom constraint of the table view to the bottom anchor of the root (or parent) view (instead of the SafeArea).
This can be done in the storyboard editor double clicking on the constraint in the right inspector and changing the first item anchor from SafeArea to Superview (or any wanted view).
You can then set the edge insets at will if needed (to avoid content remain partially hidden behind the rounded frame corners or the notch if applying the same procedure to the top anchor)
I have a custom view that gets loaded from nib that has a number of subviews. Some of these subviews contain labels which can be a dynamic height. This view ends up being added as a subview to a view that is in a scroll view.
Think ScrollView > View > SubView > Dynamic Labels
I am using auto layout constraints and therefore need to set the height of SubView that is required to display all the content in itself, so that the ScrollView will scroll the length necessary to display everything in the SubView.
I know with a UILabel, you can do something like val neededLabelHeight = label.sizeThatFits(CGFloat(width: label.frame.height, height: CGFloat.greatestFiniteMagnitude)) to get the needed height to display on a single label, but when I attempt to do this on a whole custom view loaded from nib, it just has the height of the view I have in my nib file.
Is there something similar for doing it on a view with more subviews, other than calculating the needed hight of the view by summing all the needed heights of its subviews and vertical constraints?
Here is a simple example...
The XIB file looks like this:
Note: the Bottom Label has a constraint of >= 8 to the bottom of the view. That way you don't have to worry about IB showing an error during design. Any extra space at the bottom will automatically "disappear" at run-time.
The Storyboard looks like this:
The scroll view has a red background (to make it easy to see). The labels and views containing buttons are laid-out and constraints are set as we normally set them.
The "Blue" view - TheXIB Container View - has a Height constraint of 120, but is set as a Placeholder that will be removed at run-time, allowing the view loaded from the XIB to control its height. This will be the view to which we add our Labels Holder View from the XIB.
Here's how it looks with a small amount of text:
It's not scrollable, because there isn't enough content.
After tapping the "Add" buttons a few times, it looks like this:
and it is scrollable (we can see it's scrolled down in this image).
For folks who prefer using a "content view" as the "root" view of a scroll view, it works the same (orange view is the content view, inset by 8-pts on each side):
Here is a link to this example project: https://github.com/DonMag/LoadXIBIntoScroll
And here's a gif animation of it in action:
I've added a scrollview to a view in my app, the view is selected from a tab controller and as such is a container and not a UIViewController it is declared as below
class HomeViewController: Container, UIScrollViewDelegate {..
I've added the scrollview in the storyboard and added all of the components to it and I've assigned the delegate from the storyboard and I've placed this code in my ViewController
scrollview.contentSize = CGSize(width:1048, height:scrollview.frame.height)
scrollview.delegate = self
This how my ScrollView looks in my storyboard, you can see that scrollview is my UIScrollView, then I've added a UIView viewScroll and then added four views to viewScroll (View1, View2, View3 and View4), scrollview is sized at 375x340 and viewScroll is set at 1048x340
When I run the app it does not scroll. As it is not a UIViewController, do I need to approach this differently or is there something else I have missed?
I've added the scrollview in the storyboard and set the width as 1050 and height as 330
You should set the width and height of scroll view to be at most as large as its containing view. What you need to set to 1050 and 330 is contentSize of the scroll view - scrollView is only scrollable when its contentSize is larger than its bounds.
If you're setting up your scroll view using Interface Builder, then you'll need to add constraints to its children's edges. For example, in your case you'll have to add leading, trailing, top, and bottom constraints to your View Scroll view. Select it and add following constraints in interface builder:
After that there will be something like this:
When you add edge constraints to UIScrollViews child views, you are hinting the scroll view about its content size. And if scroll view knows its content size and it is larger than scroll view's bounds, you'll have scroll working.
Issue: gap above where contentView starts. Should be 0.
Despite setting the content view top bottom leading and trailing to 0, the content view has a gap at the top. I am using auto layout only.
Scrollview background is blue &
Content view is grey for easy viewing.
If I set the content view to equal heights as the scroll view, I get an error. And this doesn't seem like the right approach away. According to this setting equal height is optional:
Apple auto layout scrollview page
I do set equal widths.
Entire Screen:
Top of Scroll view:
Bottom of scroll view -> this is right - flush with bottom of scroll view (not sure if that matters)
Constraints:
Subview constraints:
Please help!! Also I am using xib files - not sure if that matters.
Thank you!
You'll notice that the gap is equal in height to the navigation bar.
The gap is there because by default iOS assumes that when using a translucent navigation bar, scroll views (and their subclasses like table views) begin at the top of the screen, behind the translucent navigation bar.
iOS then assumes you do not want your content hidden behind the translucent navigation bar, so it applies a top content inset to any scroll view, of height equal to the navigation bar height.
This behavior can be overridden in two ways:
Unmark Adjust Scroll View Insets on the view controller (see image below)
Make your navigation bar not translucent. If you're using a Storyboard, select the navigation controller that contains the affected view controller, and unmark the Translucent checkbox.