diff --git a/easy2d-imgui/libs/ImGui/imgui_demo.cpp b/easy2d-imgui/libs/ImGui/imgui_demo.cpp
index 6fbde69a..839d9947 100644
--- a/easy2d-imgui/libs/ImGui/imgui_demo.cpp
+++ b/easy2d-imgui/libs/ImGui/imgui_demo.cpp
@@ -1150,7 +1150,7 @@ static void ShowDemoWindowWidgets()
         ImGui::TreePop();
     }
 
-    if (ImGui::TreeNode("Data Types"))
+    if (ImGui::TreeNode("DataUtil Types"))
     {
         // The DragScalar/InputScalar/SliderScalar functions allow various data types: signed/unsigned int/long long and float/double
         // To avoid polluting the public API with all possible combinations, we use the ImGuiDataType enum to pass the type,
diff --git a/easy2d/2d/Animation.h b/easy2d/2d/Animation.h
index 878f4e7d..c19360e0 100644
--- a/easy2d/2d/Animation.h
+++ b/easy2d/2d/Animation.h
@@ -32,7 +32,7 @@ namespace easy2d
 
 		Animation(
 			Duration duration,			/* 动画时长 */
-			FramesPtr const& frames,	/* 帧集合 */
+			FramesPtr const& frames,	/* 序列帧 */
 			EaseFunc func = nullptr		/* 速度变化 */
 		);
 
diff --git a/easy2d/2d/Frames.h b/easy2d/2d/Frames.h
index 128fb2a8..36ddcf5a 100644
--- a/easy2d/2d/Frames.h
+++ b/easy2d/2d/Frames.h
@@ -23,7 +23,7 @@
 
 namespace easy2d
 {
-	// 帧集合
+	// 序列帧
 	class E2D_API Frames
 		: public virtual Object
 	{
@@ -31,7 +31,7 @@ namespace easy2d
 		Frames();
 
 		explicit Frames(
-			Array<ImagePtr> const& frames	/* 关键帧数组 */
+			Array<ImagePtr> const& frames	/* 序列帧 */
 		);
 
 		virtual ~Frames();
diff --git a/easy2d/common/String.h b/easy2d/common/String.h
index a48ae2f1..862ec966 100644
--- a/easy2d/common/String.h
+++ b/easy2d/common/String.h
@@ -1203,14 +1203,14 @@ namespace std
 	template<>
 	struct hash<::easy2d::String>
 	{
-		size_t operator()(const easy2d::String& key) const
+		inline size_t operator()(const easy2d::String& key) const
 		{
 			return key.hash();
 		}
 	};
 
 	template<>
-	void swap<::easy2d::String>(::easy2d::String& lhs, ::easy2d::String& rhs)
+	inline void swap<::easy2d::String>(::easy2d::String& lhs, ::easy2d::String& rhs)
 	{
 		lhs.swap(rhs);
 	}
diff --git a/easy2d/easy2d.h b/easy2d/easy2d.h
index 9366388b..f1e9ebd2 100644
--- a/easy2d/easy2d.h
+++ b/easy2d/easy2d.h
@@ -106,7 +106,7 @@
 //
 
 #include "utils/Path.h"
-#include "utils/Data.h"
+#include "utils/DataUtil.h"
 #include "utils/File.h"
 #include "utils/ResLoader.h"
 
diff --git a/samples/Samples/Demo2.h b/samples/Samples/Demo2.h
index 25471345..2ec7efb7 100644
--- a/samples/Samples/Demo2.h
+++ b/samples/Samples/Demo2.h
@@ -3,20 +3,21 @@
 #pragma once
 #include "common.h"
 
-E2D_DECLARE_SMART_PTR(Man);
-class Man
+// 怪物
+E2D_DECLARE_SMART_PTR(Monster);
+class Monster
 	: public Sprite
 {
 public:
-	Man()
+	Monster()
 	{
 		// 加载图片
-		Load(L"res/man.png");
+		Load(L"res/akushu.png");
 		// 缩小图片
-		SetScale(0.5f);
+		SetScale(0.7f);
 	}
 
-	// 每帧更新时
+	// 每帧渲染前执行 OnUpdate
 	void OnUpdate(Duration dt) override
 	{
 		// 获取输入设备
@@ -41,7 +42,7 @@ public:
 			this->Move(0, 2);
 		}
 
-		// 按下鼠标左键，顺时针旋转小人
+		// 按下鼠标左键，顺时针旋转怪物
 		if (input.IsDown(MouseButton::Left))
 		{
 			// 获取当前旋转角度
@@ -50,7 +51,7 @@ public:
 			this->SetRotation(rotation + 2);
 		}
 
-		// 点击鼠标右键，隐藏或显示小人
+		// 点击鼠标右键，隐藏或显示怪物
 		if (input.WasPressed(MouseButton::Right))
 		{
 			// 获取当前显示状态
@@ -72,11 +73,11 @@ public:
 
 	Demo2()
 	{
-		// 创建人物
-		ManPtr man = new Man;
+		// 创建怪物
+		MonsterPtr monster = new Monster;
 		// 在屏幕上居中显示
-		man->SetAnchor(0.5f, 0.5f);
-		man->SetPosition(WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2);
+		monster->SetAnchor(0.5f, 0.5f);
+		monster->SetPosition(WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2);
 
 		// 创建说明文字
 		TextPtr text = new Text(L"按上下左右键移动\n按鼠标左键旋转\n点击鼠标右键隐藏");
@@ -88,7 +89,7 @@ public:
 		text->SetAlignment(TextAlign::Center);
 
 		// 添加到场景
-		this->AddChild(man);
+		this->AddChild(monster);
 		this->AddChild(text);
 	}
 };
diff --git a/samples/Samples/Demo3.h b/samples/Samples/Demo3.h
index 0b798212..bc41ee6f 100644
--- a/samples/Samples/Demo3.h
+++ b/samples/Samples/Demo3.h
@@ -20,7 +20,7 @@ public:
 	{
 		// 加载音乐
 		music = new Music;
-		if (!music->Load(L"res/music.wav"))
+		if (!music->Load(L"res/splash.mp3"))
 		{
 			music = nullptr;
 
diff --git a/samples/Samples/Demo4.h b/samples/Samples/Demo4.h
new file mode 100644
index 00000000..298e8945
--- /dev/null
+++ b/samples/Samples/Demo4.h
@@ -0,0 +1,192 @@
+// Copyright (C) 2019 Nomango
+
+#pragma once
+#include "common.h"
+
+// 老虎
+E2D_DECLARE_SMART_PTR(Tiger);
+class Tiger
+	: public Sprite
+{
+	FramesPtr run_frames;			// 跑步序列帧
+	FramesPtr stand_frames;			// 站立序列帧
+	bool facing_left;				// 面朝左或面朝右
+	bool running;					// 是否正在跑步
+	Direction running_direction;	// 跑步方向
+
+public:
+	Tiger()
+	{
+		// 获取图片原始大小
+		ImagePtr image = new Image(L"res/tiger.png");
+		Size source_size = image->GetSize();
+		// 计算每帧图片大小
+		Size frame_size = { source_size.x / 5, source_size.y / 3 };
+
+		// 加载帧动画
+		run_frames = new Frames;
+		for (int i = 0; i < 6; ++i)
+		{
+			Point pos = { (i % 5) * frame_size.x, (i / 5) * frame_size.y };
+			ImagePtr frame = new Image(L"res/tiger.png", Rect{ pos, frame_size });
+			run_frames->Add(frame);
+		}
+
+		stand_frames = new Frames;
+		for (int i = 0; i < 6; ++i)
+		{
+			Point pos = { ((i + 1) % 5) * frame_size.x, ((i + 1) / 5 + 1) * frame_size.y };
+			ImagePtr frame = new Image(L"res/tiger.png", Rect{ pos, frame_size });
+			stand_frames->Add(frame);
+		}
+
+		// 执行动画
+		AddAction(
+			Tween::Animation(stand_frames)
+			.SetDuration(1000)
+			.SetLoops(-1)
+		);
+
+		// 添加按键监听
+		AddListener(Event::KeyDown, Closure(this, &Tiger::OnKeyDown));
+		AddListener(Event::KeyUp, Closure(this, &Tiger::OnKeyUp));
+
+		// 默认方向为 Left
+		facing_left = true;
+		running = false;
+
+		// 设置锚点
+		SetAnchor(0.5f, 0.5f);
+	}
+
+	void OnKeyDown(Event const& e)
+	{
+		if (e.key.code == KeyCode::Left)
+			Run(Direction::Left);
+		else if (e.key.code == KeyCode::Right)
+			Run(Direction::Right);
+		else if (e.key.code == KeyCode::Up)
+			Run(Direction::Up);
+		else if (e.key.code == KeyCode::Down)
+			Run(Direction::Down);
+	}
+
+	void OnKeyUp(Event const& e)
+	{
+		switch (e.key.code)
+		{
+		case KeyCode::Left:
+		case KeyCode::Right:
+		case KeyCode::Up:
+		case KeyCode::Down:
+			StopRun();
+			break;
+		}
+	}
+
+	void Run(Direction d)
+	{
+		if (!running)
+		{
+			running = true;
+			StopAllActions();
+
+			// 执行跑步动画
+			AddAction(
+				Tween::Animation(run_frames)
+				.SetDuration(500)
+				.SetLoops(-1)
+			);
+		}
+
+		running_direction = d;
+		if (running_direction == Direction::Left)
+		{
+			facing_left = true;
+		}
+		else if (running_direction == Direction::Right)
+		{
+			facing_left = false;
+		}
+
+		// 缩放可以调整图片显示方向
+		// 缩放至 -1 图片会反转
+		SetScaleX(facing_left ? 1.0f : -1.0f);
+	}
+
+	void StopRun()
+	{
+		if (running)
+		{
+			running = false;
+			StopAllActions();
+
+			// 执行站立动画
+			AddAction(
+				Tween::Animation(stand_frames)
+				.SetDuration(1000)
+				.SetLoops(-1)
+			);
+		}
+	}
+
+	void OnUpdate(Duration dt)
+	{
+		if (running)
+		{
+			// 计算移动距离
+			// OnUpdate 并不是一个稳定间隔执行的函数, 如果想实现稳定
+			// 每秒移动 150 像素, 应根据 dt 参数计算移动距离
+			const float moving_per_sec = 150;
+			const float distance = moving_per_sec * dt.Seconds();
+
+			switch (running_direction)
+			{
+			case Direction::Up:
+				Move(0, -distance);
+				break;
+			case Direction::Down:
+				Move(0, distance);
+				break;
+			case Direction::Left:
+				Move(-distance, 0);
+				break;
+			case Direction::Right:
+				Move(distance, 0);
+				break;
+			}
+		}
+	}
+};
+
+class Demo4
+	: public Scene
+{
+public:
+	static ScenePtr Create()
+	{
+		return new Demo4;
+	}
+
+	Demo4()
+	{
+		// 创建老虎
+		TigerPtr tiger = new Tiger;
+		// 在屏幕上居中显示
+		tiger->SetAnchor(0.5f, 0.5f);
+		tiger->SetPosition(WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2);
+
+		// 创建说明文字
+		TextPtr text = new Text(L"按上下左右键移动");
+		// 设置节点大小为文字布局大小
+		text->SetSize(text->GetLayoutSize());
+		// 设置文字位置
+		text->SetAnchor(0.5f, 0.5f);
+		text->SetPosition(WINDOW_WIDTH / 2, WINDOW_HEIGHT - 80);
+		text->SetAlignment(TextAlign::Center);
+
+		// 添加到场景
+		this->AddChild(tiger);
+		this->AddChild(text);
+	}
+};
diff --git a/samples/Samples/Samples.vcxproj b/samples/Samples/Samples.vcxproj
index 36448e9f..bf42c497 100644
--- a/samples/Samples/Samples.vcxproj
+++ b/samples/Samples/Samples.vcxproj
@@ -140,6 +140,7 @@
     <ClInclude Include="Demo1.h" />
     <ClInclude Include="Demo2.h" />
     <ClInclude Include="Demo3.h" />
+    <ClInclude Include="Demo4.h" />
     <ClInclude Include="include-forwards.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/samples/Samples/Samples.vcxproj.filters b/samples/Samples/Samples.vcxproj.filters
index 4683312d..ca8331ac 100644
--- a/samples/Samples/Samples.vcxproj.filters
+++ b/samples/Samples/Samples.vcxproj.filters
@@ -9,5 +9,6 @@
     <ClInclude Include="common.h" />
     <ClInclude Include="Demo2.h" />
     <ClInclude Include="Demo3.h" />
+    <ClInclude Include="Demo4.h" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/samples/Samples/include-forwards.h b/samples/Samples/include-forwards.h
index 9c7bae91..725810f8 100644
--- a/samples/Samples/include-forwards.h
+++ b/samples/Samples/include-forwards.h
@@ -5,3 +5,4 @@
 #include "Demo1.h"
 #include "Demo2.h"
 #include "Demo3.h"
+#include "Demo4.h"
diff --git a/samples/Samples/main.cpp b/samples/Samples/main.cpp
index 1181bba6..7dbba836 100644
--- a/samples/Samples/main.cpp
+++ b/samples/Samples/main.cpp
@@ -14,6 +14,7 @@ namespace
 		{ L"动画示例", Demo1::Create },
 		{ L"输入示例", Demo2::Create },
 		{ L"音频播放示例", Demo3::Create },
+		{ L"帧动画示例", Demo4::Create },
 	};
 	int s_DemoIndex = 0;
 	int s_DemoNum = sizeof(s_Demos) / sizeof(Demo);
@@ -25,6 +26,7 @@ class DemoApp
 public:
 	DemoApp()
 	{
+		ShowConsole();
 		// 使用 Audio 组件
 		Use(&Audio::Instance());
 
@@ -39,7 +41,8 @@ public:
 
 	void ChangeDemoScene()
 	{
-		GetWindow()->SetTitle(s_Demos[s_DemoIndex].title);
+		String title = s_Demos[s_DemoIndex].title;
+		GetWindow()->SetTitle(title);
 
 		ScenePtr scene = s_Demos[s_DemoIndex].Create();
 		EnterScene(scene);
@@ -48,8 +51,10 @@ public:
 		scene->AddListener(Event::KeyUp, Closure(this, &DemoApp::KeyPressed));
 
 		// 显示提示文字
-		TextPtr intro = new Text(L"Key 1~3 to select demo");
+		String intro_str = format_wstring(L"按键 1~%d 可切换示例\n", s_DemoNum);
+		TextPtr intro = new Text(intro_str + title);
 		intro->SetFontSize(16.f);
+		intro->SetPosition(10, 10);
 		scene->AddChild(intro);
 	}
 
diff --git a/samples/Samples/res/akushu.png b/samples/Samples/res/akushu.png
new file mode 100644
index 00000000..916e43b7
Binary files /dev/null and b/samples/Samples/res/akushu.png differ
diff --git a/samples/Samples/res/man.png b/samples/Samples/res/man.png
deleted file mode 100644
index 4f89e869..00000000
Binary files a/samples/Samples/res/man.png and /dev/null differ
diff --git a/samples/Samples/res/music.wav b/samples/Samples/res/music.wav
deleted file mode 100644
index b54e0547..00000000
Binary files a/samples/Samples/res/music.wav and /dev/null differ
diff --git a/samples/Samples/res/splash.mp3 b/samples/Samples/res/splash.mp3
new file mode 100644
index 00000000..1f084890
Binary files /dev/null and b/samples/Samples/res/splash.mp3 differ
diff --git a/samples/Samples/res/tiger.png b/samples/Samples/res/tiger.png
new file mode 100644
index 00000000..4ddffcde
Binary files /dev/null and b/samples/Samples/res/tiger.png differ