我有一个垂直的UIStackView,我试图将多个视图都以固定高度50固定添加到堆栈视图中。
在xib中,我已将堆栈视图上的对齐方式和分布设置为Fill。
let button = UIButton()
button.setTitle(card.title, for: .normal)
button.layer.cornerRadius = 10
button.layer.backgroundColor = UIColor.red.cgColor
let damageCardConstraint = button.heightAnchor.constraint(equalToConstant: 50)
damageCardConstraint.isActive = true
// let label = UILabel()
// label.text = $0.title
self?.damageCardView.addArrangedSubview(button)
我希望视图以固定的高度50添加到堆栈视图。相反,我得到的视图的高度可以填充堆栈视图的高度(高度为200)。我也在控制台中得到了
[LayoutConstraints] Unable to simultaneously satisfy constraints.
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:0x600002288140 UIStackView:0x7f894df03c50.height == 400 (active)>",
"<NSLayoutConstraint:0x60000228b0c0 UIButton:0x7f894dd0ed90'Wounded Pilot'.height == 50 (active)>",
"<NSLayoutConstraint:0x60000228b070 'UISV-canvas-connection' UIStackView:0x7f894df03c50.top == UIButton:0x7f894dd0ed90'Wounded Pilot'.top (active)>",
"<NSLayoutConstraint:0x60000228b570 'UISV-canvas-connection' V:[UIButton:0x7f894dd0ed90'Wounded Pilot']-(0)-| (active, names: '|':UIStackView:0x7f894df03c50 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x60000228b0c0 UIButton:0x7f894dd0ed90'Wounded Pilot'.height == 50 (active)>
所以看来我添加的约束已被破坏。我不确定应该删除哪个约束来解决我的问题。
答案 0 :(得分:0)
您可以尝试这个,它对我有用。 您必须采用堆栈视图高度限制
var numberOfButtonsYouWant = 10
@IBOutlet weak var stackViewHeightConstraint: NSLayoutConstraint!
如果您不想重复按钮,则可以在添加新视图之前删除所有已排列的堆栈视图子视图。
stackViewHeightConstraint.constant = CGFloat(numberOfButtonsYouWant) * button.frame.size.height
damageCardConstraint.translatesAutoresizingMaskIntoConstraints = false
damageCardConstraint.addArrangedSubview(button)
答案 1 :(得分:0)
您需要在底部添加一个填充视图,否则stackView将拉伸最后一个视图以填充剩余空间,请看以下示例:
import UIKit
import PlaygroundSupport
class VC: UIViewController {
override func loadView() {
let views = [UIColor.red, .blue, .green]
.map(viewWith)
views.forEach {
$0.heightAnchor.constraint(equalToConstant: 50).isActive = true
}
let filler = UIView()
filler.backgroundColor = .white
let stackView = UIStackView(arrangedSubviews: views + [filler])
stackView.axis = .vertical
stackView.distribution = .fill
stackView.alignment = .fill
view = stackView
}
func viewWith(color: UIColor) -> UIView {
let view = UIView()
view.backgroundColor = color
return view
}
}
PlaygroundPage.current.needsIndefiniteExecution = true
PlaygroundPage.current.liveView = VC()