I have to display multiple views inside a single view controller. I have added a scroll view and added the views through the interface builder. Constraints added to all four sides as well.
Each label (green label) and view (gray view) is embedded in a UIStackView. I have set the leading, top, trailing and height constraints added to each stack view. No auto layout issues/warnings in Xcode.
But when I run the app, it shows up like this.
Why doesn't the stackview get the width according to the leading and trailing constraints I've set?
You need to add three more constraints.
Pin width of A Stack View equal to superview -16.
Pin width of B = width of A
Pin width of C = width of B
Related
i have a UITableView that contains a prototype cell holding labels , each label subbed in a view , all views stacked in a vertical UIStackView
and i have a constrain for the stack ,,
at runtime in iphone SE
unless I set stack width for 414 ( for iphone 6+ ) it will appear like
i don't want to set fixed width , but the constrains not applied correctly ,, what i have missed here
Set leading, trailing, top and bottom constraints of stackView equal to leading, trailing, top and bottom constraints of content view in your table view cell. Change constant of constraint how you want to.
delete centerX and centerY constraints, you don't need them if you set it how I wrote above
In storyboard
Just select stack view and click to Add New Constraint icon. Then set value of leading, trailing, top and bottom constraint and click to Add 4 Constraints
I have a UIScrollView and an UIStackView. I want to add elements from top to bottom and let the scrollview scroll only vertically. I have trouble with this and don't really get what the problem is.
So I added the constrains that the UIScrollView should stick to the super view on all sides, added the stackview, you can see its constrain on the pic, also added a label with fixed width. I want this label to be center in the scrollview without the scrollview starting to scroll horizontally.
I think Im missing some constrains? The scroll view also says it has "ambiguous scrollable content width".
First to fix ambiguous you should create a contentView for the scrollView as Apple recommends and give it width of outmost view then put the stackView inside it and Change alignment of the stackview to .center + alignment of the label itself
Scrollview // pinned to top , leading , trailing ,bottom
contentView // pinned to top , leading , trailing ,bottom , and have width = outmost view (very important)
stackView
I've been trying to create a UIScrollView for user registry but with no success. I'm using auto layout and all of the fields that go inside the scroll view are static. Because of the usual ambiguous height issue, I've added a UIView inside the scroll view, set the constraints to the margins of the scroll view and centered aligned it. After that I added all of the fields inside that Content View, in the storyboard.
The content fields have their constraints setup as you would expect, but when I get to the lowest field and set the bottom constraint to the bottom of the Content View then everything breaks.
I'm asked by Xcode to set the priority of some views, and when I do as is says, the Content View size stays the same and the views are shrunken.
I tried not to put the last bottom constraint and resize the Content View by code but the height is not resized as is should.
I'm looking for a good solution to do this in storyboards and auto layout.
Update: I added a bottom constraint with a low priority, but the content scroll view is not expanding to show all of the fields.
Add&Set ScrollView(UIScrollView)
Add&Set ContentView(UIView) with subviews
! Set ContentView Width equal to View Width
Set all subviews constraints
View1 should be tied to the top of the ContentView
View4 should be tied to the bottom of the ContentView
All SubView (View1, View2, View3, View4 ...) must have a height and distance between each other
P.s. In your case, if iOS > 9.0 you can replace ContentView with UIStackView
You are using auto layout so the size of the content view is determined by constraints. Follow the below steps to provide proper constraints:
Drag the Scroll View inside main view and provide constraints Top, Bottom, Leading and Trailing in align with Super View (Main View) as
per screenshot.
Take View which will contain your content and drag inside Scroll View. and provide the constraints Center X, Center Y, Top, Bottom,
Leading and Trailing in align with Scroll View as per screenshot
Put all the element inside content view which is a subview of scroll view and provide Top constraint relative to the element above
it, to make equal space between the elements (eg. label, button etc.)
(Make sure you provide required constraint for X-position)
Last element is "Register Account" button make sure you provide the Top Constraint relative to country and Bottom constraint relative to
superview (content view) and change the priority for Top or Bottom
constraint as per screenshot, otherwise it gives error.
I am trying to make a view containing an UIScrollView. This UIScrollView contains 3 UIViews. The last one contains another UIStackView I wanted to fill at runtime.
Here an image of the storyboard :
But when I add content at runtime in the second UIStackView, the ScrollView's height remains the same.
The second UIStackView is defined as the first one with:
Axis : vertical
Alignment : Fill
Distribution : Equal Spacing
Then I use :
mStackView.addArrangedSubview(matProgress)
The result below :
What's the way to have the bottom view and the ScrollView stretch to fit the content.
The layout can be done with auto-layout and constraints.
The key points are:
do not set height constraints on either StackView
set the "Main" StackView Distribution to Equal Spacing
set the "Main" StackView Leading, Trailing, Top and Bottom constraints to its Superview (which is the ScrollView)
you do need to also set a width constraint on the "Main" StackView to control the horizontal contentSize
The only quirk will be on startup. If you have NO content in the bottom / inner StackView, it will still "exist" in the Main StackView and take up space. There is a trick to get around that, but it must be done in code.
You can see a working example here: https://github.com/DonMag/StackyScrolly
If you have UIScrollView and the child views with auto-layout. Setting programmatically the height of the scrollview will stretch the inside views to comply with the auto-layout.
So, you get by code the height of the third view and set the UIScrollView height to view1.height + view2.height + expectedThirdViewHeight.
I'm trying to build UI similar to that of ios photo gallery : Navigation view controller with a scrollview occupying 80% height and 100% width of the parent's view and the collection view controller occupying the rest of the height and 100% width. So here's how it looks like :
The blue area is scrollview and its content view. The bottom part is a collection view which suppose to behave like a carousel. You can see the constraints that I have set in the following screenshot :
:
I want to set the scrollview height so that it only occupies 80% of the parent view estate and the collection view occupies the rest. However, I can't seem to resolve scrollview constraint issues such as autolayout not able to resolve height/y position of scrollview. As you can see in the above pic, I tried setting the height of the scrollview to 50% of the parent view but the autolayout still complains about not being able to resolve height. If I let interface builder resolve the issue, it just adds spacing to the content view inside scrollview and pushes it down as a result. You can see that in the following screenshots.
Your view heirarchy is correctly setup so thats quite nice and you are on the right track of what constraints to add. I'm going to write all the constraints starting from step 1.
To your UIScrollView add a top, leading and trailing constraint to the superView. Also add a equal height constraint between your UIScrollView and the superView and set the multiplier to 0.8.
Now add your UICollectionView below the UIScrollView and give it a leading, trailing and bottom to the superView. Also add a vertical spacing between the UICollectionView and UIScrollView.
Now add for the contentView inside the UIScrollView. Add a leading, top, bottom and trailing for the contentView to UIScrollView. As soon as you do this, the constraints will break and Xcode will complain. Now what you need to do more is add a equal height and width constraint between the UIScrollView and contentView. Set the priority of this equal height constraint (assuming you want vertical scroll) to something like 250, so that it breaks when the content inside the UIScrollView becomes too large to be displayed completely.
Now as far as that extra spacing issue is concerned. What you need to do is, select the UIViewController that has your UIScrollVIew and then select the attributes inspector for this UIViewController and uncheck the adjust scroll view insets option. For a screenshot, check this.
As i see from above do the following.
Add leading, trailing and top constraint to scrollview.
Add height constraint i.e drag from scrollview to superview and add equal width, in equal width constraint change the multiple factor to 0.8.
Add leading trailing, bottom constraint to collection view with respect to superview and vertical space constraint with respect to scrollview.