我通常对Xamarin表单和编码不熟悉,我想在应用启动后立即检查设备是否具有生物特征识别功能。我看到了这段视频,该视频演示了如何使用按钮进行操作,我想在打开应用程序后立即使用它。你可以帮忙吗?
btnFPLogin.Clicked += FingerPrint;
private async void FingerPrint(object sender, EventArgs e)
{
var result = await CrossFingerprint.Current.IsAvailableAsync(true);
Plugin.Fingerprint.Abstractions.FingerprintAuthenticationResult auth;
if (result)
{
try
{
var res = await App.Current.MainPage.DisplayAlert("Success", "Your data are saved", "Ok", "Cancel");
auth = await CrossFingerprint.Current.AuthenticateAsync("Authenticate access");
if (auth.Authenticated)
{
await App.Current.MainPage.DisplayAlert("Results are here", "Valid fingerprint found", "Ok");
}
else
{
await App.Current.MainPage.DisplayAlert("Results are here", "Invalid fingerprint", "Ok");
}
}
catch
{
await App.Current.MainPage.DisplayAlert("permission to use FaceID", "We need permission to use FaceID", "Ok");
}
}
}
您已经回答了自己的问题。要检查设备是否支持生物特征登录,请使用CrossFingerprint插件
var result = await CrossFingerprint.Current.IsAvailableAsync(true);
如果要在应用程序启动时进行检查,请将其放在OnStart
类的App
方法中