使用CAShapeLayer的UIView不顯示CAGradientLayer

Question

我嘗試將輻射應用於自定義形狀的UIView

我使用的漸變類別如果經過充分測試並在我的代碼的其他部分中使用。 但是，我不能讓它在使用CAShapeLayer創建的自定義形狀視圖中正常運行

在我的UIView類別中：

@implementation UIView (Grandiant)

- (void)addGradientBackgroundFromTopColor:(UIColor *)topColor toBottomColor:(UIColor *)bottomColor {
    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = self.frame;
    gradient.colors = [NSArray arrayWithObjects:(id)[topColor CGColor], (id)[bottomColor CGColor], nil];
    [self.layer insertSublayer:gradient atIndex:0];
}

@end

在我的UIView子類中：

   override func awakeFromNib() {
        super.awakeFromNib()
          self.addGradientBackgroundFromTopColor(UIColor(red: 221.0/256.0, green: 0.5, blue: 32.0/256.0, alpha: 1), toBottomColor: UIColor(red: 220.0/256.0, green: 94.0/256.0, blue: 17.0/256.0, alpha: 1))
    }

    override var frame: CGRect {
    didSet {
        let bezierpath = UIBezierPath()
        bezierpath.moveToPoint(CGPoint(x: 0, y: 0)) // 1
        bezierpath.addLineToPoint(CGPoint(x: 0, y:  frame.height - triangleHeight)) // 2
        bezierpath.addLineToPoint(CGPoint(x: frame.width / 2, y: frame.height))// 3
        bezierpath.addLineToPoint(CGPoint(x: frame.width, y: frame.height - triangleHeight))// 4
        bezierpath.addLineToPoint(CGPoint(x: frame.width, y: 0))// 5
        let mask = CAShapeLayer()
        mask.frame = bounds
        mask.path = bezierpath.CGPath
        layer.mask = mask

該視圖隨着backgroundColor分配給它而出現。 我嘗試在應用蒙版后設置漸變，但沒有太多結果。

Answer 1

在代碼中

- (void)addGradientBackgroundFromTopColor:(UIColor *)topColor toBottomColor:(UIColor *)bottomColor {
    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = self.frame;
    gradient.colors = [NSArray arrayWithObjects:(id)[topColor CGColor], (id)[bottomColor CGColor], nil];
    [self.layer insertSublayer:gradient atIndex:0];
}

更改

gradient.frame = self.frame;

至

gradient.frame = self.bounds;