unity 2019.4.17f1c1 的安卓平台的 Export Project在哪里,用图片表示出来或者详细说出位置

Export Project 在 Unity 编辑器的菜单栏中，依次点击 File -> Build Settings，然后在弹出的窗口中选择 Android 平台，点击“Export”按钮，即可打包出 APK 文件。具体位置如下图所示：


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unity2019.4.34f1

Unity 2019.4.34f1是Unity游戏引擎的一个版本号。它是Unity 2019系列的最后一个版本，用于开发2D和3D游戏、模拟器、虚拟现实和增强现实应用程序等。这个版本通常用于修复错误和增加一些新功能，以提供更好的稳定性和性能。你有关于Unity 2019.4.34f1的更具体的问题吗？

NullReferenceException: Object reference not set to an instance of an object Inventory.OnClickPickUp () (at Assets/Script/Inventory.cs:39) UnityEngine.Events.InvokableCall.Invoke () (at <ff7b004c24954ff98f68a709be4708c3>:0) UnityEngine.Events.UnityEvent.Invoke () (at <ff7b004c24954ff98f68a709be4708c3>:0) UnityEngine.UI.Button.Press () (at D:/Program Files/Unity/Hub/Editor/2019.4.14f1c1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:68) UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at D:/Program Files/Unity/Hub/Editor/2019.4.14f1c1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:110) UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at D:/Program Files/Unity/Hub/Editor/2019.4.14f1c1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:50) UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at D:/Program Files/Unity/Hub/Editor/2019.4.14f1c1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:261) UnityEngine.EventSystems.EventSystem:Update() (at D:/Program Files/Unity/Hub/Editor/2019.4.14f1c1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:377)

这是一个 NullReferenceException 异常，在调用 Inventory.cs 脚本的 OnClickPickUp() 函数的时候发生了错误。可能是因为对象的引用未被正确初始化，导致出现了 "Object reference not set to an instance of an object" 的错误。你需要检查 Inventory.cs 中的代码，确认所有的对象都被正确地初始化并且没有为空的引用。另外，也需要检查你的按钮是否正确绑定了 OnClickPickUp() 函数。