Align to Left the contents of UIStackView

fig.png

left-align-stack-view.swift

import UIKit
import PlaygroundSupport

let view = UIView(frame: CGRect(x: 0, y: 0, width: 400, height: 400))
view.backgroundColor = .white

let stack = UIStackView(frame: CGRect(x: 0, y: 0, width: 400, height: 400))
stack.axis = .horizontal
stack.alignment = .center
stack.distribution = .fill
stack.spacing = 8

let label = UILabel()
label.text = "ラベル"
label.backgroundColor = .blue

let button = UIButton(type: .roundedRect)
button.setTitle("ボタン", for: .normal)
button.backgroundColor = .green

let spacerView = UIView()
spacerView.setContentHuggingPriority(.defaultLow, for: .horizontal)

stack.addArrangedSubview(label)
stack.addArrangedSubview(button)
stack.addArrangedSubview(spacerView)

view.addSubview(stack)

PlaygroundPage.current.liveView = view