我试图在Swift 3中为iOS编写一个简单的复合组件。它由uilabel组成,然后是一个uitextfield,水平布置了一个uitextfield,然后是下面的一条线。但是发生的事情是uilabel消失了,uitextfield出现在父视图上,行也消失了。
我在草图中的设计
故事板中的实际外观
我组件在视图控制器中的约束
我的目的是使用自动布局,将标签固定到顶部,并带有视图的领先锚,将Textfield锚定在视图顶部,并以恒定的速度将标签的锚定锚定,以便它们并排出现。<<<<<<<<<<<<<<<<<<<</p>
我确实对此做了很多研究,一个看上去非常接近我想要的网站是https://www.raywenderlich.com/125718/coding-auto-layout,我想我正在关注更多或更多
少于相同的方法。我在做一些明显错误的事情,但无法弄清楚什么。任何帮助都非常感谢,我已经在此工作了几天。
import UIKit
@IBDesignable
class OTextEdit: UIView {
@IBInspectable var LabelText: String = "Label"
@IBInspectable var SecureText: Bool = false
@IBInspectable var Color: UIColor = UIColor.black
@IBInspectable var Text: String = "" {
didSet {
edit.text = Text
}
}
fileprivate let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 35))
fileprivate let edit = UITextField(frame: CGRect(x: 210, y: 0, width: 200, height: 35))
fileprivate let line: UIView = UIView()
override var intrinsicContentSize: CGSize {
return CGSize(width: 300, height: 100)
}
func setup() {
label.text = LabelText
label.textColor = Color
label.font = UIFont(name: "Avenir Next Condensed", size: 24)
edit.font = UIFont(name: "Avenir Next Condensed", size: 24)
edit.borderStyle = .roundedRect
edit.isSecureTextEntry = SecureText
line.backgroundColor = UIColor.white
self.addSubview(label)
self.addSubview(edit)
self.addSubview(line)
}
override func willMove(toSuperview newSuperview: UIView?) {
super.willMove(toSuperview: newSuperview)
setup()
setupConstaints()
}
func setupConstaints() {
label.translatesAutoresizingMaskIntoConstraints = false
edit.translatesAutoresizingMaskIntoConstraints = false
line.translatesAutoresizingMaskIntoConstraints = false
label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: -10).isActive = true
label.topAnchor.constraint(equalTo: topAnchor)
edit.leadingAnchor.constraint(equalTo: label.leadingAnchor, constant: 10).isActive = true
edit.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
edit.topAnchor.constraint(equalTo: self.topAnchor)
line.heightAnchor.constraint(equalToConstant: 2.0).isActive = true
line.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 10).isActive = true
line.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
line.topAnchor.constraint(equalTo: label.bottomAnchor, constant: 1.0).isActive = true
}
}
您没有一系列的约束,因此自动布局无法确定对象的内容大小。您已经尝试通过initrinsicContentSize
设置此设置,但是您不需要执行此操作。
您还需要为您的标签设置水平拥抱优先级,以便让自动布局知道您希望文本字段扩展:
我删除了您对intrinsicContentSize
的替代,并将您的约束更改为:
- 将标签的底部限制到线的顶部
- 将行的底部限制到监督的底部
- 将标签的基线限制为文本字段的基线
- 删除文本字段顶部和Supperiew之间的约束
- 设置标签的水平拥抱优先级。
func setupConstraints() {
label.translatesAutoresizingMaskIntoConstraints = false
edit.translatesAutoresizingMaskIntoConstraints = false
line.translatesAutoresizingMaskIntoConstraints = false
label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 10).isActive = true
label.setContentHuggingPriority(.defaultHigh, for: .horizontal)
label.topAnchor.constraint(equalTo: topAnchor)
label.bottomAnchor.constraint(equalTo: line.topAnchor, constant: -8).isActive = true
edit.leadingAnchor.constraint(equalTo: label.trailingAnchor, constant: 10).isActive = true
edit.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
edit.firstBaselineAnchor.constraint(equalTo: label.firstBaselineAnchor).isActive = true
line.heightAnchor.constraint(equalToConstant: 2.0).isActive = true
line.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 10).isActive = true
line.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
line.topAnchor.constraint(equalTo: label.bottomAnchor, constant: 1.0).isActive = true
line.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
}
我认为它非常接近您的追求。