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我希望我的 NSView 同时具有渐变背景和阴影,所以我继承NSView并覆盖了- (void)awakeFromNib这样的方法:

[self setWantsLayer:YES]; // view's backing store is using a Core Animation Layer

CAGradientLayer *backgroundGradient = [[CAGradientLayer alloc] init];
backgroundGradient.colors = @[
    (__bridge id)CGColorCreateGenericGray(0.85, 1.0),
    (__bridge id)CGColorCreateGenericGray(0.94, 1.0)
];
backgroundGradient.masksToBounds = NO;

CALayer *shadowLayer = [CALayer layer];
shadowLayer.shadowColor = CGColorCreateGenericGray(0.5, 1.0);
shadowLayer.shadowOffset = NSMakeSize(0, 0.0);
shadowLayer.shadowRadius = 10.0;
shadowLayer.shadowOpacity = 1.0;
shadowLayer.masksToBounds = NO;

[backgroundGradient addSublayer:shadowLayer];

[self setLayer:backgroundGradient];

但是,只显示了梯度。此外,如果我尝试,[self setLayer:shadowLayer]则会显示阴影(但当然,没有渐变)。

如何同时显示渐变和阴影?非常感谢!

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