86 lines
2.2 KiB
Swift
86 lines
2.2 KiB
Swift
//
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// Extensions.swift
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// Pods-Example
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//
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// Created by Jon Kent on 7/1/19.
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//
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import Foundation
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extension NSObject: InitializableClass {}
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internal extension UIView {
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@discardableResult func untransformed(_ block: () -> CGFloat) -> CGFloat {
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let transform = self.transform
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self.transform = .identity
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let value = block()
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self.transform = transform
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return value
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}
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func bringToFront() {
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self.superview?.bringSubviewToFront(self)
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}
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func untransform(_ block: () -> Void) {
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untransformed { () -> CGFloat in
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block()
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return 0
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}
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}
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}
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internal extension UIViewController {
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var activeViewController: UIViewController {
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switch self {
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case let navigationController as UINavigationController:
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return navigationController.visibleViewController?.activeViewController ?? self
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case let tabBarController as UITabBarController:
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return tabBarController.selectedViewController?.activeViewController ?? self
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case let splitViewController as UISplitViewController:
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return splitViewController.viewControllers.last?.activeViewController ?? self
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default:
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return presentedViewController?.activeViewController ?? self
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}
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}
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@objc var isHidden: Bool {
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return presentingViewController == nil
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}
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}
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internal extension UIGestureRecognizer {
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convenience init(addTo view: UIView, target: Any, action: Selector) {
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self.init()
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addTarget(target, action: action)
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view.addGestureRecognizer(self)
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}
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convenience init?(addTo view: UIView?, target: Any, action: Selector) {
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guard let view = view else { return nil }
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self.init(addTo: view, target: target, action: action)
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}
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}
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internal extension UIPanGestureRecognizer {
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var canSwitch: Bool {
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return !(self is UIScreenEdgePanGestureRecognizer)
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}
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var xTranslation: CGFloat {
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return view?.untransformed {
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return self.translation(in: view).x
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} ?? 0
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}
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var xVelocity: CGFloat {
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return view?.untransformed {
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return self.velocity(in: view).x
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} ?? 0
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}
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}
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