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.
Related
I am attempting to set up a scroll view and every video I watch they say the same things:
•Make scrollview in VC
•Make it bound to all margins (0,0,0,0)
•Embed a content view inside of Scrollview
•Content view margins are (0,0,0,0)
•Set Equal heights & width from content view to superview
•set priority of height to 250
I have done this time and time again and cannot figure out why it still isn't working. Can someone please double check these screenshots?
Try adding some subviews into your content view and make sure to have a complete set of vertical constraints from top to bottom.
If you go in the Size inspector under the "Scroll View" Section you can find the "Content Layout Guides" tick, disable and the errors will disappear
If you Set All the constraints to ScrollView and want to set its contents in code .. it remains complaining about its constraints because they remain ambiguous .. so to remove error from story board
what you do is set Ambiguity to never verify and error will go away .... hope it will help
Looks like you do not have anything bound to your Content Layout Guide.
So basically you have two guides in Scroll View: Frame and Content.
Frame Layout Guide provides you the ability to bind to your UIScrollView's frame. E.g. equal width between your Content view and Scroll View itself.
The most useful here is Content Layout Guide. Basically it helps to determine the scrollable content size of your UIScrollView's contents.
So in your case you have to have a Content view inside your Scroll View that has equal width with Frame Layout Guide and have its edges pinned to Content Layout Guide. Like so:
Oh, and do not forget to have your Content view have a determined height so your scroll view will calculate the size of its scrollable contents.
I have added `pod 'TPKeyboardAvoidingSwift' in project in storyboard added view hierarchy like below
for scrollContainerview constraints
top, leading, trailing, bottom = 0 (safe area)
for scroll view i have given class name and constraints
top, leading, trailing, bottom = 0 (superview)
if i add view in side scrollview it shows redline
here how to add scrollview and how to give constraints
how to make selected textfield scroll up to keyboard using TPKeyboardAvoidingSwift.
please help me here.
Try this Pod instead, IQKeyboardManager
It literally only needs 1 line of code in AppDelegate and you are good to go, no need to do any further handling
I know similar questions were asked before but all of them do it programatically and I'm trying to do this in the storyboard.
I have a scroll view with top, bottom, leading and trailing constraints, with a view inside it that is pinned to all edges of the scroll view and has equal width and height #250. Inside that I have a stack view with 6 other views that will change their height dynamically based on how much text each label gets. And it all works fine except for the fact that it doesn't scroll even when content overflows.
What am I doing wrong?
Here's a look at the storyboard:
You need to remove the inner view height which = 250 , and pin the stackView to all it's edges
I'm currently making a drawing application in Swift, but I wanted the page to be able to expand if the user wanted more room. I figured that I would use a UIScrollView to scroll around the canvas, but I wanted it to expand whenever the user went to the edge of the page, and for the UIImageView that I am drawing on to expand with it. Does anyone know how I would go about doing this?
Thanks!
In storyboard, drag a UIView into your UIScrollView then constrain that view to all sides of the scroll view. Then set the width to whichever value you would like (I would recommend to control drag from your view to the root view of the view controller and select equal widths), then give it a height constraint. Next, you need to connect an IBOutlet to your view controller code for the height constraint you set on the content view inside the scroll view. When you need to extend the page, add to the value of the height constraint and call layoutIfNeeded() on the scroll view.
I am pretty sure this has something to do with the dreaded AutoLayout. (been trying since 2days to get hang of it)
So I mastered it somewhat, but now I have problem where my UIScrollView is not scrolling fully down, pictures are much better at explaining these things
this is the scroll view
this is the content view
so the problem is the scrolling is happening but then again it springs back up. So I am not able to click on the signup button
EDIt 1
Edit:
I have created a little example on github for you to look at, here. The project illustrates the answer below and uses the techniques I describe and nothing else.
Original Answer:
couple of things I would advise here.
First, I know you've been trying for a while but remove all the current constraints (painful I know but). Do this for clarity as ....
The view should be the size of the scene, it looks like you want the scrollview to be the full screen so that too needs to be the size of the scene.
e.g. if you are designing at 6Plus by default the scene size is 414x736 so the view and the scrollview it contains should also be 414x736.
Only the content view needs to be the size of the real content you wish to show. Let's say for arguments sake that the content is 414x1000.
Now the constraints for the scrollview are simple. It needs zero spacing to all it's edges.
You can add the content view to the scrollview in a couple of ways. The way I try to do this varies from project to project and depends mostly on how complex the scene is. If it's a really busy scene I keep the content view outside of the scrollview in interface builder so that I can work on it easily and visualize the whole of the view. Then I add the content view to the scrollview in code.
If its a simpler view You can add it inside the scrollview in interface builder. Ultimately whichever way you do it, you can lose visibility of the content view in interface builder because the contentview is larger than the scrollview and the content gets obscured. So play about and find a good way for you.
Define the content view and all it's subviews. The content view needs to be taller than the scrollview otherwise it wont scroll. All of the content view's subviews need to have defined heights from top to bottom and widths from left to right. In your case the scrollview is scrolling vertically not horizontally so all the widths need to add up to the width of the scroll view BUT the heights need to add up to the full height of the content view.
Note: if you do this proportially your life will be easier later. If you do all this with fixed heights the storyboard will break on different device sizes.
Now the "tricky bit" and it's a bit counter intuitive. You need to pin the content view to the scrollview, remember the height of the content view is taller than the scrollview. In all other circumstances in Interface Builder pinning a view to a superview (0 padding) will adjust the height (or width) accordingly. For the relationship between a scrollview and it's content view this doesn't happen.
First pin the contentview
Notice the -400? Remember the content view is taller than the scrollview and we will change this immediately.
Select the bottom constraint (-400) that we have just created:
Select the drop down arrow next to the constant value:
Select Standard Value and type in 0 for the constant.
You should now have a storyboard with no broken constraints and if you build and run you should get a scrollview as desired.
Your bottomspace to superview on your content view is set to -74.0, I don't know if there is a reason you had to do that, but try setting it to -8.0. I think your scroll view is scrolling up to the 0.0 mark automatically