StackViewを入れ子にしていて、子のStackViewをhiddenにすると次のようなログが出る。
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(
"<NSLayoutConstraint:0x150ab6c10 'UISV-canvas-connection' UIStackView:0x150b9c8e0.top == UIView:0x150b9ca90.top>",
"<NSLayoutConstraint:0x150ab33c0 'UISV-canvas-connection' V:[UIView:0x150b9cd80]-(0)-| (Names: '|':UIStackView:0x150b9c8e0 )>",
"<NSLayoutConstraint:0x150abb760 'UISV-hiding' V:[UIStackView:0x150b9c8e0(0)]>",
"<NSLayoutConstraint:0x150ab2c40 'UISV-spacing' V:[UIView:0x150b9ca90]-(>=4)-[UIView:0x150b9cd80]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x150ab2c40 'UISV-spacing' V:[UIView:0x150b9ca90]-(>=4)-[UIView:0x150b9cd80]>
原因と対処法
子のStackViewをhiddenにして高さ0になったけど、中の要素が消えてないためspacingと衝突しているっぽい。中の要素をすべてhiddenにするとspacingがなくなって、なおる。