init - 初始化项目

samples/winrt/ImageManipulations/common/suspensionmanager.h

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+//*********************************************************
+//
+// Copyright (c) Microsoft. All rights reserved.
+// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
+//
+//*********************************************************
+
+//
+// SuspensionManager.h
+// Declaration of the SuspensionManager class
+//
+
+#pragma once
+
+#include <ppltasks.h>
+
+namespace SDKSample
+{
+    namespace Common
+    {
+        /// <summary>
+        /// SuspensionManager captures global session state to simplify process lifetime management
+        /// for an application.  Note that session state will be automatically cleared under a variety
+        /// of conditions and should only be used to store information that would be convenient to
+        /// carry across sessions, but that should be disacarded when an application crashes or is
+        /// upgraded.
+        /// </summary>
+        ref class SuspensionManager sealed
+        {
+        internal:
+            static void RegisterFrame(Windows::UI::Xaml::Controls::Frame^ frame, Platform::String^ sessionStateKey);
+            static void UnregisterFrame(Windows::UI::Xaml::Controls::Frame^ frame);
+            static Concurrency::task<void> SaveAsync(void);
+            static Concurrency::task<void> RestoreAsync(void);
+            static property Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionState
+            {
+                Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ get(void);
+            };
+            static Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionStateForFrame(
+                Windows::UI::Xaml::Controls::Frame^ frame);
+
+        private:
+            static void RestoreFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
+            static void SaveFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
+        };
+    }
+}