CAGradientLayer框架无法正确显示

Question

我有以下代码来呈现CAGradientLayer，它应该覆盖整个视图。但是，它不能正确显示在模拟器中。我打印了self.view.bounds.width和self.view.bounds.height的值，这些值打印了正确的值。下面也是模拟器的屏幕截图。

// Add background layer to calendar view
    let gradientLayer = CAGradientLayer()
    gradientLayer.bounds = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height)
    gradientLayer.colors = [lightDarkColor.cgColor, darkColor.cgColor, lightDarkColor.cgColor]
    gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.0)
    gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
    self.view.layer.insertSublayer(gradientLayer, at: 0)

Answer 1

您需要设置frame而不是bounds

gradientLayer.frame = self.view.frame // here frame = bounds