WebGL call window (save, open)

open a file

#if UNITY_WEBGL && !UNITY_EDITOR
    //
    // WebGL
    //
    [DllImport("__Internal")]
    private static extern void UploadFile(string gameObjectName, string methodName, string filter, bool multiple);

    public void OnPointerDown(PointerEventData eventData) {
    
    
        UploadFile(gameObject.name, "OnFileUpload", ".png, .jpg", false);//打开图片
        //UploadFile(gameObject.name, "OnFileUpload", ".txt", false);打开文本
    }

    // Called from browser
    public void OnFileUpload(string url) {
    
    
        StartCoroutine(OutputRoutine(url));
    }
#else
void Start() {
    
    
        var button = GetComponent<Button>();
        button.onClick.AddListener(OnClick);
    }

    private void OnClick() {
    
    
        var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", ".png", false);//打开 图片
        //var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", "txt", false);打开文本
        if (paths.Length > 0) {
    
    
            StartCoroutine(OutputRoutine(new System.Uri(paths[0]).AbsoluteUri));
        }
    }
private IEnumerator OutputRoutine(string url) {
    
    
        var loader = new WWW(url);
        yield return loader;
        output.texture = loader.texture;
    }

download file

	private byte[] _textureBytes;
	//private string _data = "Example text created by StandaloneFileBrowser";
    void Awake() {
    
    
        // Create red texture
        var width = 100;
        var height = 100;
        Texture2D tex = new Texture2D(width, height, TextureFormat.RGB24, false);
        for (int i = 0; i < width; i++) {
    
    
            for (int j = 0; j < height; j++) {
    
    
                tex.SetPixel(i, j, Color.red);
            }
        }
        tex.Apply();
        _textureBytes = tex.EncodeToPNG();
        UnityEngine.Object.Destroy(tex);
    }
#if UNITY_WEBGL && !UNITY_EDITOR
    //
    // WebGL
    //
    [DllImport("__Internal")]
    private static extern void DownloadFile(string gameObjectName, string methodName, string filename, byte[] byteArray, int byteArraySize);

    // Broser plugin should be called in OnPointerDown.
    public void OnPointerDown(PointerEventData eventData) {
    
    
        DownloadFile(gameObject.name, "OnFileDownload", "sample.png", _textureBytes, _textureBytes.Length);//下载图片
        //var bytes = Encoding.UTF8.GetBytes(_data);
        //DownloadFile(gameObject.name, "OnFileDownload", "sample.txt", bytes, bytes.Length);//下载文本
    }

    // Called from browser
    public void OnFileDownload() {
    
    
        output.text = "File Successfully Downloaded";
    }
#else
	public void OnClick() {
    
    
        var path = StandaloneFileBrowser.SaveFilePanel("Title", "", "sample", "png");//图片保存
        //var path = StandaloneFileBrowser.SaveFilePanel("Title", "", "sample", "txt");文本保存
        if (!string.IsNullOrEmpty(path)) {
    
    
            File.WriteAllBytes(path, _textureBytes);
            //File.WriteAllText(path, _data);
        }
    }

Plugin download

https://download.csdn.net/download/qq_39556084/86264750