Unity3D如何从iPhone下载图片？

JastinBall
我用iOS Unity插件给Unity发送了图像路径。在Unity中，我尝试着用收到的路径获取图片（我不知道如何把iPhone的图片发送到Unity）。问题是：我还没能获得图片。WWW Error: The requested URL was not found on this server. （WWW错误：服务器中无法找到请求的URL）

//Tried both "file:///..." and "file://..."
string path = "file://var/mobile/Applications/173DE26D-4C0E-4DF7-9DC6-9CBB7D4FC954/Documents/Images/image.png"

Texture texture;

IEnumerator WaitForRequest(WWW www) {
    yield return www;

    if (www.error == null) {
        texture = www.texture;
    }    
}

void Start() {
    WWW www = new WWW(path);
    StartCoroutine(WaitForRequest(www));
}