jumppage功能

Pods/PopupDialog/PopupDialog/Classes/TransitionAnimator.swift

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+//
+//  PopupDialogTransitionAnimator.swift
+//
+//  Copyright (c) 2016 Orderella Ltd. (http://orderella.co.uk)
+//  Author - Martin Wildfeuer (http://www.mwfire.de)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+import UIKit
+
+/// Base class for custom transition animations
+internal class TransitionAnimator: NSObject, UIViewControllerAnimatedTransitioning {
+
+    var to: UIViewController!
+    var from: UIViewController!
+    let inDuration: TimeInterval
+    let outDuration: TimeInterval
+    let direction: AnimationDirection
+
+    init(inDuration: TimeInterval, outDuration: TimeInterval, direction: AnimationDirection) {
+        self.inDuration = inDuration
+        self.outDuration = outDuration
+        self.direction = direction
+        super.init()
+    }
+
+    internal func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
+        return direction == .in ? inDuration : outDuration
+    }
+
+    internal func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
+        switch direction {
+        case .in:
+            guard let to = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to),
+                let from = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from) else { return }
+            
+            self.to = to
+            self.from = from
+
+            let container = transitionContext.containerView
+            container.addSubview(to.view)
+        case .out:
+            guard let to = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to),
+                let from = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from) else { return }
+            
+            self.to = to
+            self.from = from
+        }
+    }
+}