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ios中while（）不能www方式讀取文件

void FDJson() {using(WWW _load = new WWW("file://"+FileFunc.GetStreamPathRW("FontPreferenceC.json"))) // {while(!_load.isDone){}
　　}
}

安卓卻可以這樣讀取

?

經過修改

IEnumerator FDJson() {using(WWW _load = new WWW("file://"+FileFunc.GetStreamPathRW("FontPreferenceC.json"))) // {while(!_load.isDone){yield return null;} } }

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可以在ios下正常讀取了

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但是這個要用到IEnumerator 枚舉器，很不方便，所以讀取文件最好用system.io接口讀取

public static string ReadTextFromFile (string path){if (System.IO.File.Exists (path)){return System.IO.File.ReadAllText (path, System.Text.Encoding.UTF8);}else return null;}

?

但io在安卓中不適用，因為安卓的文件都是jar壓縮格式，所以在安卓中要用www讀取文件，

http://answers.unity3d.com/questions/210909/android-streamingassets-file-access.html

So I was never able to figure out if it is possible to use the System.IO.FileInfo class to check the existence of a file that is added to your Android .APK file through the?StreamingAssets?directory. At this point I really doubt it's possible at all. The reason for this is that the .APK file is an archive, as you may know you can open a .APK file using any archiving utility (WinRAR for example) to inspect it's contents as I touched on above. So the FileInfo class apparently does not support archives like this.

Fortunately the WWW class does support a URI in the style of a?JAR URL. So instead I am just pointing my WWW object at the location where the file might be (using the correct JAR URL syntax) and seeing if I come back with an error.

This forums post?was extremely insightful in showing how exactly to open a file from the?StreamingAssets?folder. I'm kind of surprised that this issue isn't better documented, but hopefully in the future this post will save someone a lot of time.

In review:

Don't use System.IO.FileInfo to access files that are archived in your .APK

WWW is your best friend.

The correct URI to access?StreamingAssets?on Android devices is:?"jar:file://" + Application.dataPath + "!/assets/" + fileName

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轉載于:https://www.cnblogs.com/pengyingh/archive/2013/04/18/3029727.html

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