我有一个自定义 UIView,如下所示:
import UIKit
class MainLogoAnimationView: UIView {
@IBOutlet var customView: UIView!
var turquoiseCircle: AnimationCircleView!
var redCircle: AnimationCircleView!
var blueCircle: AnimationCircleView!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
func setup() {
_ = Bundle.main.loadNibNamed("MainLogoAnimationView", owner: self, options: nil)?[0] as! UIView
self.addSubview(customView)
customView.frame = self.bounds
setupAnimation()
}
let initialWidthScaleFactor: CGFloat = 0.06
func setupAnimation() {
let circleWidth = frame.size.width*initialWidthScaleFactor
let yPos = frame.size.height/2 - circleWidth/2
turquoiseCircle = AnimationCircleView(frame: CGRect(x: 0, y: yPos, width: circleWidth, height: circleWidth))
turquoiseCircle.circleColor = UIColor(red: 137/255.0, green: 203/255.0, blue: 225/255.0, alpha: 1.0).cgColor
turquoiseCircle.backgroundColor = UIColor.lightGray
addSubview(turquoiseCircle)
redCircle = AnimationCircleView(frame: CGRect(x: 100, y: yPos, width: circleWidth, height: circleWidth))
addSubview(redCircle)
blueCircle = AnimationCircleView(frame: CGRect(x: 200, y: yPos, width: circleWidth, height: circleWidth))
blueCircle.circleColor = UIColor(red: 93/255.0, green: 165/255.0, blue: 213/255.0, alpha: 1.0).cgColor
addSubview(blueCircle)
}
}
我在界面生成器中创建了一个浅蓝色的 UIView,并将上面的 View MainLogoAnimationView
设置为其子类。如果我运行该应用程序,我会得到以下信息:
对于turquoiseCircle
来说,框架似乎没有被放置在我设置的x = 0
处。不知道我在这里做错了什么。是否是因为它是在 MainLogoAnimationView
完全初始化之前放置的,所以放置不正确?我尝试在 layoutSubviews()
中设置圆圈的框架,但这也没有任何区别。我似乎经常遇到这个问题,因为观点被放错了地方,并且认为我在这里错过了一些基本的东西。我做错了什么?
更新:
import UIKit
class MainLogoAnimationView: UIView {
@IBOutlet var customView: UIView!
var turquoiseCircle: AnimationCircleView!
var redCircle: AnimationCircleView!
var blueCircle: AnimationCircleView!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
func setup() {
_ = Bundle.main.loadNibNamed("MainLogoAnimationView", owner: self, options: nil)?[0] as! UIView
self.addSubview(customView)
customView.frame = self.bounds
setupAnimation()
}
let initialWidthScaleFactor: CGFloat = 0.2
func setupAnimation() {
blueCircle = AnimationCircleView()
blueCircle.translatesAutoresizingMaskIntoConstraints = false
blueCircle.backgroundColor = UIColor.lightGray
blueCircle.circleColor = UIColor.blue.cgColor
addSubview(blueCircle)
redCircle = AnimationCircleView()
redCircle.translatesAutoresizingMaskIntoConstraints = false
redCircle.backgroundColor = UIColor.lightGray
addSubview(redCircle)
}
override func layoutSubviews() {
super.layoutSubviews()
let circleWidth = bounds.size.width*initialWidthScaleFactor
let yPos = frame.size.height/2 - circleWidth/2
blueCircle.frame = CGRect(x: 0, y: yPos, width: circleWidth, height: circleWidth)
redCircle.frame = CGRect(x: frame.size.width/2 - circleWidth/2, y: yPos, width: circleWidth, height: circleWidth)
}
}
和:
导入UIKit
class AnimationCircleView: UIView {
var circleColor = UIColor(red: 226/255.0, green: 131/255.0, blue: 125/255.0, alpha: 1.0).cgColor {
didSet {
shapeLayer.fillColor = circleColor
}
}
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
let shapeLayer = CAShapeLayer()
func setup() {
let circlePath = UIBezierPath(ovalIn: self.bounds)
shapeLayer.path = circlePath.cgPath
shapeLayer.fillColor = circleColor
shapeLayer.frame = self.bounds
layer.addSublayer(shapeLayer)
}
}
最佳答案
在init中的设置肯定会提供self.frame
/self.bounds
无论 View 的初始化值是什么,而不是在 View 层次结构中布局时的正确最终值。处理这个问题的最佳方法可能就像您尝试过的那样,在 init 中添加 View ,并使用属性来保留对它们的引用(您已经在这样做),然后在 -layoutSubviews()
中设置框架。 .
它可能在 -layoutSubviews()
中不起作用的原因对于创建后的每个 View ,您需要调用 .translatesAutoresizingMaskIntoConstraints = false
。否则,对于以编程方式创建的 View ,当作为 subview 添加时,系统将为值创建约束,从而覆盖框架的任何设置。尝试设置一下,看看效果如何。
编辑:为了调整 CAShapeLayer 的大小,而不是添加为子层(这需要手动调整大小),因为 AnimationCirleView View 是专门的,该 View 可以由 CAShapeLayer 支持。答案见Overriding default layer type in UIView in swift
关于ios - 自定义 UIView 的 subview 的 x 框架位置错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42006395/