51 lines
1.4 KiB
Swift
51 lines
1.4 KiB
Swift
//
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// CALayer.swift
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// Mastodon
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//
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// Created by Cirno MainasuK on 2021-2-26.
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//
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import UIKit
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extension CALayer {
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public func setupShadow(
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color: UIColor = .black,
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alpha: Float = 0.5,
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x: CGFloat = 0,
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y: CGFloat = 2,
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blur: CGFloat = 4,
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spread: CGFloat = 0,
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roundedRect: CGRect? = nil,
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byRoundingCorners corners: UIRectCorner? = nil,
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cornerRadii: CGSize? = nil
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) {
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// assert(roundedRect != .zero)
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shadowColor = color.cgColor
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shadowOpacity = alpha
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shadowOffset = CGSize(width: x, height: y)
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shadowRadius = blur / 2
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rasterizationScale = UIScreen.main.scale
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shouldRasterize = true
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masksToBounds = false
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guard let roundedRect = roundedRect,
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let corners = corners,
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let cornerRadii = cornerRadii else {
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return
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}
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if spread == 0 {
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shadowPath = UIBezierPath(roundedRect: roundedRect, byRoundingCorners: corners, cornerRadii: cornerRadii).cgPath
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} else {
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let rect = roundedRect.insetBy(dx: -spread, dy: -spread)
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shadowPath = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: cornerRadii).cgPath
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}
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}
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public func removeShadow() {
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shadowRadius = 0
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}
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}
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