protected override async void OnStart()
{
VersionTracking.Track();
if (VersionTracking.IsFirstLaunchEver)
{
var response = await DialogService.ShowActionSheetAsync("Thanks for installing the app, would you like a tour?", null, null, "Yes", "No");
if (response == "Yes")
{
Device.OpenUri(new Uri("https://www.youtube.com/watch?v=JaVjmi7MDEs"));
}
}
else if (VersionTracking.IsFirstLaunchForVersion("1.1"))
{
await DialogService.ShowAlertAsync(
"We've just released a panoramic photo viewer. Check it out on the property details page!",
"New Features");
}
var updateTask = Task.Run(async() =>
{
var updateService = ViewModelLocator.Resolve <IUpdateService>();
if (await updateService.CheckForAppUpdatesAsync())
{
MainThread.BeginInvokeOnMainThread(async() =>
{
var mainPage = Current.MainPage;
await mainPage.DisplayAlert("App Update", "There is a new version available. Please download it from the App Store", "OK");
});
}
});
}
/// <summary>
/// 确定这是否是指定版本号的应用程序的首次启动。
/// </summary>
/// <param name="version"></param>
/// <returns></returns>
/// <exception cref="NotImplementedException"></exception>
public static bool IsFirstLaunchForVersion(string version)
{
if (Essentials.IsSupported)
{
return(VersionTracking.IsFirstLaunchForVersion(version));
}
else
{
return(CurrentVersion == version && IsFirstLaunchForCurrentVersion);
}
}
/// <inheritdoc /> public bool IsFirstLaunchForVersion(string version) => VersionTracking.IsFirstLaunchForVersion(version);