Swift UIView调整大小以适应其中的标签
我有一个UIView,我正在将它添加到我应用程序主页上的堆栈视图中 这就是我的观点:Swift UIView调整大小以适应其中的标签,swift,uiview,autolayout,resize,constraints,Swift,Uiview,Autolayout,Resize,Constraints,我有一个UIView,我正在将它添加到我应用程序主页上的堆栈视图中 这就是我的观点: class MyCustomView: UIView { public let leftLabel: UILabel = UILabel(frame: .zero) public let rightLabel: UILabel = UILabel(frame: .zero) override init(frame: CGRect) { super.init(frame:
class MyCustomView: UIView {
public let leftLabel: UILabel = UILabel(frame: .zero)
public let rightLabel: UILabel = UILabel(frame: .zero)
override init(frame: CGRect) {
super.init(frame: frame)
addSubview(leftLabel)
addSubview(rightLabel)
leftLabel.translatesAutoresizingMaskIntoConstraints = false
rightLabel.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
leftLabel.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.4),
leftLabel.leadingAnchor.constraint(equalTo: leadingAnchor),
leftLabel.topAnchor.constraint(equalTo: topAnchor),
leftLabel.bottomAnchor.constraint(equalTo: bottomAnchor),
rightLabel.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.6),
rightLabel.trailingAnchor.constraint(equalTo: trailingAnchor),
rightLabel.topAnchor.constraint(equalTo: topAnchor),
rightLabel.bottomAnchor.constraint(equalTo: bottomAnchor),
])
leftLabel.text = "Short string"
rightLabel.text = "Short string too"
}
}
我将以下内容附加到我的主堆栈视图:
让myCustomView=myCustomView(帧:.0)
stackView.addArrangedSubview(myCustomView)
这将正确加载我的标签,并根据我的需要调整所有内容的大小
但是,在我的主类中,我正在更新myCustomView.rightLabel.text=
文本正在正确更新,但mymyCustomView
大小没有调整,因此部分文本只是被截断
我试着在这里遵循其他答案,但它们似乎都不适合我
我是否遗漏了一些小东西,以便强制调整customView的大小以适应其内部的标签
提前感谢您的代码没有显示您将标签中的
.numberOfLines
设置为0
以允许多行标签
仅添加这一点,应允许标签的高度增加并扩展自定义视图。然而。。。这也会使两个标签都扩展到最高标签的大小,导致“较短”标签的文本垂直居中(我添加了背景色以便于查看视图的框架/边界):
如果将自定义视图的底部约束到每个标签的底部(位于大于或等于处),则可以保持标签“顶部对齐”:
您可以直接在游乐场页面中运行此代码以查看结果:
//: A UIKit based Playground for presenting user interface
import UIKit
import PlaygroundSupport
class MyCustomView: UIView {
public let leftLabel: UILabel = UILabel(frame: .zero)
public let rightLabel: UILabel = UILabel(frame: .zero)
override init(frame: CGRect) {
super.init(frame: frame)
addSubview(leftLabel)
addSubview(rightLabel)
// background colors so we can see the view frames
backgroundColor = .cyan
leftLabel.backgroundColor = .yellow
rightLabel.backgroundColor = .green
// we want multi-line labels
leftLabel.numberOfLines = 0
rightLabel.numberOfLines = 0
// use auto-layout
leftLabel.translatesAutoresizingMaskIntoConstraints = false
rightLabel.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
// constrain to top
leftLabel.topAnchor.constraint(equalTo: topAnchor),
// constrain to left
leftLabel.leadingAnchor.constraint(equalTo: leadingAnchor),
// constrain width = 40%
leftLabel.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.4),
// constrain to top
rightLabel.topAnchor.constraint(equalTo: topAnchor),
// constrain to right
rightLabel.trailingAnchor.constraint(equalTo: trailingAnchor),
// constrain width = 60%
rightLabel.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.6),
// constrain bottom of view (self) to >= 0 from bottom of leftLabel
bottomAnchor.constraint(greaterThanOrEqualTo: leftLabel.bottomAnchor, constant: 0.0),
// constrain bottom of view (self) to >= 0 from bottom of rightLabel
bottomAnchor.constraint(greaterThanOrEqualTo: rightLabel.bottomAnchor, constant: 0.0),
])
leftLabel.text = "Short string"
rightLabel.text = "Short string too"
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class MyViewController : UIViewController {
var theButton: UIButton = {
let b = UIButton()
b.setTitle("Tap Me", for: .normal)
b.translatesAutoresizingMaskIntoConstraints = false
b.backgroundColor = .red
return b
}()
var theStackView: UIStackView = {
let v = UIStackView()
v.translatesAutoresizingMaskIntoConstraints = false
v.axis = .vertical
v.spacing = 8
v.distribution = .equalSpacing
return v
}()
var myView = MyCustomView()
// on button tap, change the text in the label(s)
@objc func didTap(_ sender: Any?) -> Void {
myView.leftLabel.text = "Short string with\nA\nB\nC\nD\nE"
myView.rightLabel.text = "Short string too\nA\nB"
}
override func loadView() {
let view = UIView()
self.view = view
view.backgroundColor = .white
view.addSubview(theButton)
// constrain button to Top: 32 and centerX
NSLayoutConstraint.activate([
theButton.topAnchor.constraint(equalTo: view.topAnchor, constant: 32.0),
theButton.centerXAnchor.constraint(equalTo: view.centerXAnchor, constant: 0.0),
])
view.addSubview(theStackView)
// constrain stack view to Top: 100 and Leading/Trailing" 0
// no Bottom or Height constraint
NSLayoutConstraint.activate([
theStackView.topAnchor.constraint(equalTo: view.topAnchor, constant: 100.0),
theStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0.0),
theStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: 0.0),
])
theStackView.addArrangedSubview(myView)
// add an action for the button tap
theButton.addTarget(self, action: #selector(didTap(_:)), for: .touchUpInside)
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()