水平UIStackView拉伸子视图

如何解决水平UIStackView拉伸子视图

我有以下游乐场和不能找出为什么ImageView的宽度constraing未被尊重和它填充在StackView

的剩余空间

import UIKit
import PlaygroundSupport

let view = UIView(frame: CGRect(x: 0,y: 0,width: 500,height: 800))

let imageView = UIView(frame: CGRect.zero)
imageView.backgroundColor = UIColor.red

imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.heightAnchor.constraint(equalToConstant: 40).isActive = true
imageView.widthAnchor.constraint(equalToConstant: 40).isActive = true

let navBarHeaderStackView = UIStackView()
navBarHeaderStackView.distribution = .equalCentering
navBarHeaderStackView.alignment = .center
navBarHeaderStackView.axis = .horizontal
navBarHeaderStackView.addArrangedSubview(imageView)
//navBarHeaderStackView.addArrangedSubview(titlesstackView)

view.addSubview(navBarHeaderStackView)
navBarHeaderStackView.translatesAutoresizingMaskIntoConstraints = false

navBarHeaderStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor,constant: 50).isActive = true
navBarHeaderStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor,constant: 8).isActive = true
navBarHeaderStackView.topAnchor.constraint(equalTo: view.topAnchor,constant: 0).isActive = true
navBarHeaderStackView.heightAnchor.constraint(equalToConstant: 60).isActive = true

navBarHeaderStackView.backgroundColor = UIColor.blue

PlaygroundPage.current.liveView = view

解决方法

因为这个限制

navBarHeaderStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor,constant: 8).isActive = true

评论并尝试

,

将 trailingAnchor 设置为 lessThanOrEqualTo 插入 equalTo。

navBarHeaderStackView.trailingAnchor.constraint(lessThanOrEqualTo: view.trailingAnchor,constant: 8).isActive = true