mastodon-ios/Mastodon/Extension/UIView.swift

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//
// UIView.swift
// Mastodon
//
// Created by sxiaojian on 2021/2/4.
//
import UIKit
// MARK: - Convenience view creation method
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extension UIView {
static let separatorColor: UIColor = {
UIColor(dynamicProvider: { collection in
switch collection.userInterfaceStyle {
case .dark:
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return ThemeService.shared.currentTheme.value.separator
default:
return .separator
}
})
}()
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static var separatorLine: UIView {
let line = UIView()
line.backgroundColor = UIView.separatorColor
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return line
}
static func separatorLineHeight(of view: UIView) -> CGFloat {
return 1.0 / view.traitCollection.displayScale
}
}
// MARK: - Convenience view appearance modification method
extension UIView {
@discardableResult
func applyCornerRadius(radius: CGFloat) -> Self {
layer.masksToBounds = true
layer.cornerRadius = radius
layer.cornerCurve = .continuous
return self
}
@discardableResult
func applyShadow(
color: UIColor,
alpha: Float,
x: CGFloat,
y: CGFloat,
blur: CGFloat,
spread: CGFloat = 0) -> Self
{
layer.masksToBounds = false
layer.shadowColor = color.cgColor
layer.shadowOpacity = alpha
layer.shadowOffset = CGSize(width: x, height: y)
layer.shadowRadius = blur / 2.0
if spread == 0 {
layer.shadowPath = nil
} else {
let dx = -spread
let rect = bounds.insetBy(dx: dx, dy: dx)
layer.shadowPath = UIBezierPath(rect: rect).cgPath
}
return self
}
}