pr-938: An expansion on this PR to fix the lifecycle issues with transitions.

ca07d0c1 · Daniel Dahan · 68308add · ca07d0c1 · ca07d0c1 · ca07d0c1
Commit ca07d0c1 authored Oct 25, 2017 by Daniel Dahan
7 changed files
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
+## 2.12.7
+* [pr-938](https://github.com/CosmicMind/Material/pull/938): An expansion on this PR to fix the lifecycle issues with transitions.
 ## 2.12.6
 * Fixed issue where TabBar.lineColor was incorrectly being updated.

--- a/Sources/iOS/ChipBarController.swift
+++ b/Sources/iOS/ChipBarController.swift
@@ -108,9 +108,11 @@ fileprivate extension ChipBarController {
            case .top:
                container.frame.origin.y = p
                container.frame.size.height = y
            case .bottom:
                container.frame.origin.y = 0
                container.frame.size.height = y
            case .hidden:
                container.frame.origin.y = 0
                container.frame.size.height = view.bounds.height
@@ -131,9 +133,11 @@ fileprivate extension ChipBarController {
        case .top:
            chipBar.isHidden = false
            chipBar.frame.origin.y = 0
        case .bottom:
            chipBar.isHidden = false
            chipBar.frame.origin.y = view.bounds.height - chipBar.bounds.height
        case .hidden:
            chipBar.isHidden = true
        }

--- a/Sources/iOS/SearchBarController.swift
+++ b/Sources/iOS/SearchBarController.swift
@@ -96,6 +96,7 @@ fileprivate extension SearchBarController {
            case .top:
                container.frame.origin.y = q + p
                container.frame.size.height = h
            case .bottom:
                container.frame.origin.y = q
                container.frame.size.height = h

--- a/Sources/iOS/StatusBarController.swift
+++ b/Sources/iOS/StatusBarController.swift
@@ -99,6 +99,7 @@ open class StatusBarController: TransitionController {
            let h = statusBar.bounds.height
            container.frame.origin.y = h
            container.frame.size.height = view.bounds.height - h
        case .full:
            container.frame = view.bounds
        }

--- a/Sources/iOS/TabsController.swift
+++ b/Sources/iOS/TabsController.swift
@@ -175,9 +175,9 @@ open class TabsController: TransitionController {
        view.backgroundColor = .white
        view.contentScaleFactor = Screen.scale
-        prepareSelectedIndexViewController()
        prepareTabBar()
        prepareTabItems()
+        prepareSelectedIndexViewController()
    }
    open override func transition(to viewController: UIViewController, completion: ((Bool) -> Void)?) {
@@ -193,53 +193,40 @@ fileprivate extension TabsController {
     - Parameter completion: An optional completion block.
     */
    func transition(to viewController: UIViewController, isTriggeredByUserInteraction: Bool, completion: ((Bool) -> Void)?) {
-        guard let fvc = rootViewController else {
+        guard let fvcIndex = viewControllers.index(of: rootViewController) else {
-            return
-        }
-        guard let fvcIndex = viewControllers.index(of: fvc) else {
            return
        }
-        let tvc = viewController
+        guard let tvcIndex = viewControllers.index(of: viewController) else {
-        guard let tvcIndex = viewControllers.index(of: tvc) else {
            return
        }
        var isAuto = false
-        switch tvc.motionModalTransitionType {
+        switch viewController.motionModalTransitionType {
        case .auto:
            isAuto = true
            viewController.motionModalTransitionType = fvcIndex < tvcIndex ? .slide(direction: .left) : .slide(direction: .right)
        default:break
        }
-        prepare(viewController: tvc, in: container)
        if isTriggeredByUserInteraction {
            delegate?.tabsController?(tabsController: self, willSelect: viewController)
        }
-        view.isUserInteractionEnabled = false
+        super.transition(to: viewController) { [weak self, isAuto = isAuto, viewController = viewController, completion = completion] (isFinished) in
-        Motion.shared.transition(from: fvc, to: viewController, in: container) { [weak self, tvc = tvc, isAuto = isAuto, completion = completion] (isFinished) in
            guard let s = self else {
                return
            }
            if isAuto {
-                tvc.motionModalTransitionType = .auto
+                viewController.motionModalTransitionType = .auto
            }
-            s.rootViewController = tvc
-            s.view.isUserInteractionEnabled = true
            completion?(isFinished)
            if isTriggeredByUserInteraction {
-                s.delegate?.tabsController?(tabsController: s, didSelect: tvc)
+                s.delegate?.tabsController?(tabsController: s, didSelect: viewController)
            }
        }
    }

--- a/Sources/iOS/ToolbarController.swift
+++ b/Sources/iOS/ToolbarController.swift
@@ -97,6 +97,7 @@ fileprivate extension ToolbarController {
            case .top:
                container.frame.origin.y = q + p
                container.frame.size.height = h
            case .bottom:
                container.frame.origin.y = q
                container.frame.size.height = h

--- a/Sources/iOS/TransitionController.swift
+++ b/Sources/iOS/TransitionController.swift
@@ -58,18 +58,25 @@ open class TransitionController: UIViewController {
     */
    open internal(set) var rootViewController: UIViewController! {
        willSet {
-            if let v = rootViewController {
+            guard newValue != rootViewController else {
-                removeViewController(viewController: v)
+                return
+            }
+            guard let v = rootViewController else {
+                return
            }
+            removeViewController(viewController: v)
        }
        didSet {
+            guard oldValue != rootViewController else {
+                return
+            }
            prepare(viewController: rootViewController, in: container)
        }
    }
-    /// The transition type used during a transition.
-    open var motionTransitionType = MotionTransitionType.fade
    /**
     An initializer that initializes the object with a NSCoder object.
     - Parameter aDecoder: A NSCoder instance.
@@ -119,23 +126,15 @@ open class TransitionController: UIViewController {
     to the toViewController has completed.
     */
    open func transition(to viewController: UIViewController, completion: ((Bool) -> Void)? = nil) {
-        guard let fvc = rootViewController else {
+        prepare(viewController: viewController, in: container)
-            return
-        }
-        let tvc = viewController
-        tvc.view.isHidden = false
-        tvc.view.frame = container.bounds
-        tvc.motionModalTransitionType = motionTransitionType
        view.isUserInteractionEnabled = false
-        Motion.shared.transition(from: fvc, to: tvc, in: container) { [weak self, tvc = tvc, completion = completion] (isFinished) in
+        Motion.shared.transition(from: rootViewController, to: viewController, in: container) { [weak self, viewController = viewController, completion = completion] (isFinished) in
            guard let s = self else {
                return
            }
-            s.rootViewController = tvc
+            s.rootViewController = viewController
            s.view.isUserInteractionEnabled = true
            completion?(isFinished)
        }
@@ -161,6 +160,7 @@ open class TransitionController: UIViewController {
        view.contentScaleFactor = Screen.scale
        prepareContainer()
+        prepare(viewController: rootViewController, in: container)
    }
 }