ios - 背景渐变在横向模式下看不正确

Question

当我将设备置于横向模式时，背景设置错误。我如何解决它？我还可以用来了解如何将整个应用程序置于横向模式。

override func viewDidLoad() {
    super.viewDidLoad()
    //BACKGROUND FONDO
    //A linear Gradient Consists of two colours: top colour and bottom colour
    let topColor = UIColor(red: 15.0/255.0, green: 118.0/255.0, blue: 128.0/255.0, alpha: 1.0)
    let bottomColor = UIColor(red: 84.0/255.0, green: 187.0/255.0, blue: 187.0/255.0, alpha: 1.0) 

    //Add the top and bottom colours to an array and setup the location of those two.
    let gradientColors: [CGColor] = [topColor.CGColor, bottomColor.CGColor]
    let gradientLocations: [CGFloat] = [0.0, 1.0]

    //Create a Gradient CA layer
    let gradientLayer: CAGradientLayer = CAGradientLayer()
    gradientLayer.colors = gradientColors
    gradientLayer.locations = gradientLocations

    gradientLayer.frame = self.view.bounds
    self.view.layer.insertSublayer(gradientLayer, atIndex: 0)
}    //FIN BACKGROUND GRADIENT

Answer 1

在您的情况下，渐变是图层，而不是 View 。这意味着它不会在包含图层更改时(例如在旋转期间)调整大小或更改位置。您必须在旋转期间手动更改子层的框架。