void OnClick(object sender, System.EventArgs e) { var page = new TargetPage(); //page.SliderValueChanged += OnSliderValueChanged; MessagingCenter.Subscribe <TargetPage, double>(this, Events.SliderValueChanged, OnSliderValueChanged); Navigation.PushAsync(page); MessagingCenter.Unsubscribe <MessagingCenter>(this, "SliderValueChanged"); }
private void OnsliderValueChanged(TargetPage source, double newValue) { label.Text = newValue.ToString(); }