93 lines
3.2 KiB
Swift
93 lines
3.2 KiB
Swift
//
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// PopupAnimator.swift
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// JiuLaiBao
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//
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// Created by SeanXu on 2018/8/5.
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// Copyright © 2018 GuoXiaoMei. All rights reserved.
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//
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import UIKit
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import SnapKit
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public protocol PopupViewControllerType {
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var grayView: UIView { get set }
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var contentView: UIView { get set }
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var contentHeight: CGFloat { get set }
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}
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public enum PopupAnimatorType {
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case present
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case dismiss
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}
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public class PopupAnimator: NSObject, UIViewControllerAnimatedTransitioning {
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public var animatorType: PopupAnimatorType
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public init(_ animatorType: PopupAnimatorType) {
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self.animatorType = animatorType
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super.init()
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}
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public func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
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return 0.3
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}
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public func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
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let containerView = transitionContext.containerView
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guard let fromViewController = transitionContext.viewController(forKey: .from),
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let toViewController = transitionContext.viewController(forKey: .to),
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let fromView = fromViewController.view,
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let toView = toViewController.view else {
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print("!!! Error: popup animation is not allowed !!!")
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return
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}
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if animatorType == .present {
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guard let popup = toViewController as? PopupViewControllerType else {
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return
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}
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let grayView = popup.grayView
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let contentView = popup.contentView
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let duration = transitionDuration(using: transitionContext)
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toView.frame = containerView.frame
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containerView.addSubview(toView)
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toView.layoutIfNeeded()
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grayView.alpha = 0
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contentView.snp.updateConstraints { make in
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make.bottom.equalToSuperview()
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}
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toView.setNeedsUpdateConstraints()
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UIView.animate(withDuration: duration, delay: 0, options: [.curveEaseInOut], animations: {
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toView.layoutIfNeeded()
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grayView.alpha = 1.0
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}, completion: { _ in
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transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
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})
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} else if animatorType == .dismiss {
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guard let popup = fromViewController as? PopupViewControllerType else {
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return
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}
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let grayView = popup.grayView
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let contentView = popup.contentView
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let contentHeight = popup.contentHeight
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let duration = transitionDuration(using: transitionContext)
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contentView.snp.updateConstraints { make in
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make.bottom.equalTo(contentHeight)
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}
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fromView.setNeedsUpdateConstraints()
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UIView.animate(withDuration: duration, delay: 0, options: [.curveEaseInOut], animations: {
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fromView.layoutIfNeeded()
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grayView.alpha = 0
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}, completion: { _ in
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transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
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})
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}
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}
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}
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