问用于IOS的Xamarin文件选取器文件类型

EN

    private List<string> androidAcceptableList = new List<string> { "application/pdf", "image/*" }; //TODO:Read from configuration
            private List<string> iOsAcceptableList = new List<string> {  "application/pdf",
          "application/msword",
          "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
          "image/*"}; //TODO:Read from configuration
    var customFileTypes = new FilePickerFileType(new Dictionary<DevicePlatform, IEnumerable<string>> {
                    { DevicePlatform.iOS,iOsAcceptableList },
                    { DevicePlatform.Android, androidAcceptableList}
                });
var resp = FilePicker.PickAsync(new PickOptions { FileTypes = FileTypesList() });