渐变图层不适用于横向模式.迅速

Question

我在我的视图中添加了一个渐变图层,它在纵向模式下工作完美,在横向模式下不起作用.

 func createGredientBackground() {

    let layer = CAGradientLayer()
    let center = UIColor(red: 249 / 255, green: 150 / 255, blue: 107 / 255, alpha: 1).CGColor
    let end = UIColor(red: 247 / 255, green: 93 / 255, blue: 89 / 255, alpha: 1).CGColor
    let start = UIColor(red: 255 / 255, green: 229 / 255, blue: 180 / 255, alpha: 1).CGColor

    layer.colors = [start, center,end]
    layer.frame = self.view.bounds //self.view.frame
    print(layer.frame)
    layer.startPoint = CGPointMake(0.0, 0.5)
    layer.endPoint = CGPointMake(1.0, 0.5)

    self.view.layer.insertSublayer(layer, atIndex: 0)

}

谢谢.

Answer 1

子图层不会自动调整大小以适合视图:当视图获得布局传递时,您应该更新它们:

func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    gradientLayer.frame = view.layer.bounds
}

没试过,所以也许你也应该尝试一下viewDidLayoutSubviews.