public ZXingCustomScanPage(ZXingScanOverlay overlay = null) : base()
{
_overlay = overlay ?? new ZXingScanOverlay();
Title = "扫一扫";
_zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
AutomationId = "zxingScannerView",
};
// 返回结果
_zxing.OnScanResult += (result) =>
Device.BeginInvokeOnMainThread(async() =>
{
_zxing.IsAnalyzing = false;
await Navigation.PopModalAsync(); //安卓可能报错
OnScanResult?.Invoke(result);
});
// 闪光灯
_overlay.Options.FlashTappedAction = () =>
{
_zxing.IsTorchOn = !_zxing.IsTorchOn;
};
var grid = new Grid
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
};
grid.Children.Add(_zxing);
grid.Children.Add(_overlay);
Content = grid;
}
private async void CustomScanBarCodeBtn_OnClicked(object sender, EventArgs e)
{
if (await CheckPerssion())
{
var options = new ZXingScanOverlayOptions()
{
ScanColor = Color.Green,
ShowFlash = true
};
var overlay = new ZXingScanOverlay(options);
var csPage = new ZXingCustomScanPage(overlay);
csPage.OnScanResult = (result) =>
{
if (null != result)
{
CustomScanResult.Text = result.Text;
}
};
await Navigation.PushModalAsync(csPage);
}
}