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October 7, 2016 12:15
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UIView+Mask.swift
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| // Mask UIView with rect/path | |
| // inverse = false: part inside rect is kept, everything outside is clipped | |
| // inverse = true: part inside rect is cut out, everything else is kept | |
| // | |
| // Usage: | |
| // | |
| // // - Cuts rectangle inside view, leaving 20pt borders around | |
| // let rect = CGRect(x: 20, y: 20, width: bounds.size.width - 20*2, height: bounds.size.height - 20*2) | |
| // targetView.mask(withRect: rect, inverse: true) | |
| // | |
| extension UIView { | |
| 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 | |
| } | |
| func mask(withPath path: UIBezierPath, inverse: Bool = false) { | |
| let path = path | |
| let maskLayer = CAShapeLayer() | |
| if inverse { | |
| path.appendPath(UIBezierPath(rect: self.bounds)) | |
| maskLayer.fillRule = kCAFillRuleEvenOdd | |
| } | |
| maskLayer.path = path.CGPath | |
| self.layer.mask = maskLayer | |
| } | |
| } |
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Flar How can I mask and use custom area based on user's gesture.Actually I want to crop the portion of the picture based on user's selection like if he wants to crop his body in an image leaving the background then he could do so.How can I do that?