Created
May 12, 2017 12:53
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Simple way to invert a mask on a layer with swift / quartzcore / ios
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| func mask(withRect rect: CGRect, inverse: Bool = false) { | |
| let path = UIBezierPath(rect: rect) | |
| let maskLayer = CAShapeLayer() | |
| if inverse { | |
| path.appendPath(UIBezierPath(rect: self.bounds)) | |
| maskLayer.fillRule = kCAFillRuleEvenOdd | |
| } | |
| maskLayer.path = path.CGPath | |
| self.layer.mask = maskLayer | |
| } |
This shows only ON and OFF, i.e. fully opaque or complete passthrough.
How would you modify this for gradient/gradation? Make the mask alpha only partially obfuscate the underlying image.
This shows only ON and OFF, i.e. fully opaque or complete passthrough.
How would you modify this for gradient/gradation? Make the mask alpha only partially obfuscate the underlying image.
I believe you just need to apply the gradient/opaque to the UIView you are masking.
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You forgot to set an opaque colour to the maskLayer.