質問編集履歴
2
コードの編集
test
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File without changes
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test
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@@ -39,10 +39,6 @@
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override func draw(_ rect: CGRect) {
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super.draw(rect)
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-
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-
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-
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print("半透明レイヤー実行")
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1
コードを更新
test
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File without changes
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test
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@@ -4,19 +4,121 @@
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```
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import UIKit
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class overlayCameraVIew: UIView {
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lazy var hollowPoint: CGPoint = {
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return CGPoint(
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x: self.bounds.width / 2.0,
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y: self.bounds.height / 2.0
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)
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}()
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override func awakeFromNib() {
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super.awakeFromNib()
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self.backgroundColor = UIColor.clear
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}
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override func draw(_ rect: CGRect) {
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override func draw(_ rect: CGRect) {
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super.draw(rect)
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print("半透明レイヤー実行")
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// 繰り抜きたいレイヤーを作成する(今回は例として半透明にした)
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let hollowTargetLayer = CALayer()
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hollowTargetLayer.bounds = self.bounds
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hollowTargetLayer.position = CGPoint(
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x: self.bounds.width / 2.0,
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y: self.bounds.height / 2.0
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)
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hollowTargetLayer.backgroundColor = UIColor.black.cgColor
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hollowTargetLayer.opacity = 0.7
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// 四角いマスクレイヤーを作る
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let maskLayer = CAShapeLayer()
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maskLayer.bounds = hollowTargetLayer.bounds
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// 塗りを反転させるために、pathに四角いマスクレイヤーを重ねる
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let halfWidth = (self.bounds.width / 2) - 32 as CGFloat
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let ovalRect = CGRect(
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x: self.hollowPoint.x - halfWidth,
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y: self.hollowPoint.y - halfWidth,
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width: halfWidth * 2.0,
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height: halfWidth * 2.0
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)
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// 完全な円
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//let path = UIBezierPath(ovalIn: ovalRect)
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// 角丸の四角
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let path = UIBezierPath(roundedRect: ovalRect, cornerRadius: 24)
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path.append(UIBezierPath(rect: maskLayer.bounds))
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maskLayer.fillColor = UIColor.black.cgColor
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maskLayer.path = path.cgPath
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maskLayer.position = CGPoint(
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x: hollowTargetLayer.bounds.width / 2.0,
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y: hollowTargetLayer.bounds.height / 2.0
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)
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// マスクのルールをeven/oddに設定する
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maskLayer.fillRule = kCAFillRuleEvenOdd
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hollowTargetLayer.mask = maskLayer
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@@ -26,4 +128,6 @@
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128
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}
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}
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```
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