UIView 阴影未在 iphone 5 秒内显示

Question

我有一个 UIView 并想给它添加阴影。所以我得到下面给出的代码，它在所有 iphone 模拟器和设备中运行良好，但在 iphone 5s 和模拟器中也没有显示阴影。

class ShadowView: UIView {
    override var bounds: CGRect {
        didSet {
            setupShadow()
        }
    }

    private func setupShadow() {
        self.layer.cornerRadius = 2
        self.layer.shadowOffset = CGSize(width: 1, height: 1)
        self.layer.shadowRadius = 4
        self.layer.shadowOpacity = 0.5
        self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: .allCorners, cornerRadii: CGSize(width: 2, height: 2)).cgPath
        self.layer.shouldRasterize = true
        self.layer.rasterizationScale = UIScreen.main.scale
    }
}

Answer 1

希望对您有所帮助！！

import UIKit

class ShadowView: UIView {

    override func awakeFromNib() {
        super.awakeFromNib()

        setupView()
    }

    func setupView() {
        self.layer.cornerRadius = 5.0
        self.layer.shadowOpacity = 1.0
        self.layer.shadowColor = UIColor.black.cgColor
        self.layer.shadowOffset = CGSize(width: -1, height: 1)
        self.layer.masksToBounds = false
        self.layer.shadowRadius = 3.0
        self.layer.shouldRasterize = true

    }

}

UIView 阴影未在 iphone 5 秒内显示

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