订阅 SwapChainPanel 事件。
此选项要求使用 XAML 应用程序类型。 Unity 将仅接收发生在 SwapChainPanel 上的鼠标和触控事件。键盘输入始终由 CoreWindow 获取，并始终可供 Unity 使用。当 Unity 没有占据整个窗口，且旁边有其他 XAML 元素时，您可能需要使用此输入方法。在这种情况下，Unity 将无法看到发生在 Unity 渲染区域外的鼠标移动，因此不会产生副作用。
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