[notes] streamingassets

Streaming resources - Unity manual Unity Integrate most resources into the project when building the project . however , It is sometimes useful to put files into a normal file system on the target computer so that they can be accessed by pathname . An example of this is in iOS Deploy movie files on the device ; The original movie file must be located somewhere in the file system so that it can be accessed by PlayMovie Function to play .https://docs.unity3d.com/cn/2020.3/Manual/StreamingAssets.htmlUnity stay build Project When will most Assets Merge into Project in . however , Put the file into the normal file system on the target computer —— Make them accessible by pathname , Sometimes it is very useful .（ such as , stay iOS Deploy movie files on the device , The original movie file must be located somewhere in the file system , Only by  PlayMovie  Function to play .）

Unity Will Project Middle name is  StreamingAssets（ Case sensitive ） All files in the folder of are copied verbatim to a specific folder on the target computer . To get this folder , Use  Application.streamingAssetsPath  attribute . No matter when , To get  StreamingAssets  The best way to locate folders is to use  Application.streamingAssetsPath , Because it always points to the correct location on the platform where the application is running .

 Application.streamingAssetsPath  The location of the return varies depending on the platform ：

Most platforms (Unity Editor 、Windows、Linux player 、PS4、Xbox One、Switch)	Application.dataPath + "/StreamingAssets"
macOS player	Application.dataPath + "/Resources/Data/StreamingAssets"
iOS	Application.dataPath + "/Raw"
Android	Use compressed APK/JAR Documents in documents ： "jar:file://" + Application.dataPath + "!/assets"

On platforms that cannot directly access streaming media resource files （ Such as Android and WebGL） Read streaming media resources on , Please use  UnityWebRequest. For example , see also  Application.streamingAssetsPath.

On many platforms ,StreamingAssets The folder location is read-only Of ; You cannot modify or write new files in these locations at runtime . Please use  Application.persistentDataPath  To get the writable folder location .

Be careful ： be located  StreamingAssets  In folder .dll And script files do not participate in Script Compilation .

It can also be done through Resource Pack (Asset Bundle)  or Addressable resources (Addressable)  To access content that is not part of conventional game construction data , in many instances , These access methods are better than Streaming Assets Folder .