wtfautolayout | The source code for Why The Failure , Auto Layout
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QUESTION
I'm trying to make a news feed like app using UICollectionView with adaptive cell height. I found this tutorial and used the option "2. Solution for iOS 11+" for my code, which works perfectly fine. However, whenever I try to add more subviews to the cell and layout them as required, I get this error: "Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want."
Below is my code which gives me an error.
NewsFeedViewController:
...ANSWER
Answered 2020-Oct-17 at 10:29Adding this line of code to NewsFeedViewController silenced the error:
QUESTION
The following code is an attempt to add a UIStackView to a view controller, pinned on all edges with a little margin, and add a label to it.
I want the StackView to use .fillProportionally
as its distribution mode ready for when I add more views into it later on.
It seems that for a single arranged subview whenever the distribution mode is .fillProportionally
and layout margins are used then I get an ambiguous constrain error (below). What is the cause of this error?
ANSWER
Answered 2020-May-08 at 13:21First of all, set translatesAutoresizingMaskIntoConstraints
of label
to false
.
QUESTION
The following code is an attempt to programatically pin a UIStackView on all edges - ie make it full screen. What is it about these seemingly simple constraints that cause this error?
...ANSWER
Answered 2020-May-08 at 12:39Add the below code as well,
QUESTION
I've a stackview with two controls.
When the UI is not vertically constrained: Vertical1
When the UI is vertically constrained: Horizontal1
I get both UIs as pictured. There are no constraint conflicts when I show the UIs the first time. However, when I go from vertically constrained to vertical = regular, I get constraint conflicts.
When I comment out the stackview space (see code comment below), I don't get a constraint conflict.
...ANSWER
Answered 2019-Jan-28 at 21:02When a UIView
is added to a UIStackView
, the stackView will assign constraints to that view based on the properties assigned to the stackView (axis
, alignment
, distribution
, spacing
). As mentioned by @DonMag you are adding a constraint to the textField
's in the aggregateStack
view. The aggregateStack
will add its own constraints based on it attributes. By removing that constraint and the activation/deactivation code the constraint conflict goes away.
I created a small example using your code and adding some background views to the stackViews so you can see more easily what is happening when you change the various properties. Just for illustration I pinned the rootStackView
to the edges of the view controller's view, just so it would be visible.
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