渐变不覆盖图像 ios swift 3 on iphone plus devices

Question

我创建了一个包含我的渐变的视图，但渐变并未应用于整个 image/view。此问题通常出现在 iPhone plus 设备中。

import UIKit

class MainViewController: UIViewController {
    @IBOutlet weak var imageViewBanner: UIImageView!
    @IBOutlet weak var viewGradient: UIView!

    let color1 = UIColor(red: 48.0/255.0, green: 178.0/255.0, blue: 166.0/255.0, alpha: 1.0)
    let color2 = UIColor(red: 82.0/255.0, green: 96.0/255.0, blue: 169.0/255.0, alpha: 1.0)

    override func viewDidLoad() {
        super.viewDidLoad()

        self.viewGradient.frame = self.viewGradient.bounds
        let gradientLayer = CAGradientLayer()
        gradientLayer.colors = [color1.cgColor, color2.cgColor]
        gradientLayer.locations = [0.0 , 1.0]
        gradientLayer.startPoint = CGPoint(x: 0.0, y: 1.0)
        gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
        gradientLayer.frame = CGRect(x: 0.0, y: 0.0, width: self.view.frame.size.width, height: self.viewGradient.frame.size.height)
        self.viewGradient.layer.insertSublayer(gradientLayer, at: 0)
    }
}

Answer 1

gradientLayer.frame = CGRect(x: 0.0, y: 0.0, width: self.view.frame.size.width, height: self.viewGradient.frame.size.height)

在viewDidLayoutSubviews

中做以上事情

Answer 2

这里是完整的代码片段

override func viewDidLayoutSubviews() {
     self.viewGradient.frame = self.viewGradient.bounds
     let gradientLayer = CAGradientLayer()
     gradientLayer.colors = [color1.cgColor, color2.cgColor]
     gradientLayer.locations = [0.0 , 1.0]
     gradientLayer.startPoint = CGPoint(x: 0.0, y: 1.0)
     gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
     gradientLayer.frame = CGRect(x: 0.0, y: 0.0, width: self.viewGradient.frame.size.width, height: self.viewGradient.frame.size.height)
     self.viewGradient.layer.insertSublayer(gradientLayer, at: 0)
}

Answer 3

override func layoutSubviews() {
    super.layoutSubviews()
    DispatchQueue.main.async {
       self.yourView.layer.sublayers?[0].frame = self.yourView.bounds
    }
}

渐变不覆盖图像 ios swift 3 on iphone plus devices

Gradient not covering the image ios swift 3 on iphone plus devices

ios

swift

cagradientlayer