Question

我有一个像这样的自定义UIView：

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)
    }
}

我在界面构建器中创建了浅蓝色的UIView，并将上面的视图MainLogoAnimationView设置为其子类。如果我运行应用程序，我会得到这个：

似乎对于turquoiseCircle，我设置的框架未放置在x = 0。不知道我在这里做错了什么。是因为它被放置在MainLogoAnimationView完全初始化之前被放置错误了吗？我尝试在layoutSubviews()中设置圆圈的框架，这也没有任何区别。我似乎遇到了很多错误的观点，并且认为我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)
    }

}

Answer 1

无论视图的初始化值是什么，在init中设置都会提供self.frame / self.bounds值，而不是正确的最终值。在视图层次结构中。处理此问题的最佳方法可能就像您尝试过，在init中添加视图，并使用属性来保留对它们的引用（您已经这样做了），然后在-layoutSubviews()中设置框架。

它可能无法在-layoutSubviews()中工作的原因是，创建后的每个视图都需要调用.translatesAutoresizingMaskIntoConstraints = false。否则，使用以编程方式创建的视图，系统将在作为子视图添加时为值创建约束，从而覆盖任何帧设置。尝试设置并查看它是如何进行的。

编辑：要调整CAShapeLayer的大小，而不是添加为子图层（需要手动调整大小），因为AnimationCirleView视图是专用的，因此视图可以由CAShapeLayer支持。请参阅Overriding default layer type in UIView in swift

上的答案

Custom UIView的子视图有错误的x帧位置

1 个答案: