[英]How can i get notification from DatePicker and Timepicker only user presses Done button in Xamarin forms IOS
我想知道只有當用戶按下Xamarin forms IOS中的完成按鈕時,如何從 Datepicker 和 timepicker 獲取通知。 當前,當 TimePicker 屬性更改並且 DatePicker DateSelected 在選擇器選擇的索引發生更改時引發。
幫我解決這個問題。
當用戶按下DatePicker
和TimerPicker
的完成按鈕時,將觸發未聚焦事件。
例如:
<StackLayout>
<!-- Place new controls here -->
<app71:myPicker Unfocused="DatePicker_Unfocused"/>
<TimePicker Unfocused="TimePicker_Unfocused" />
</StackLayout>
在.cs中:
private void DatePicker_Unfocused(object sender, FocusEventArgs e)
{
Console.WriteLine("DatePicker_Unfocused");
}
private void TimePicker_Unfocused(object sender, FocusEventArgs e)
{
Console.WriteLine("TimePicker_Unfocused");
}
您還可以使用自定義渲染器處理原生 Xamarin.iOS 項目中的點擊事件,這是 DatePicker 的示例:
[assembly: ExportRenderer(typeof(myPicker), typeof(MyPickerRenderer))]
namespace App71.iOS
{
public class MyPickerRenderer : DatePickerRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
var toolbar = (UIToolbar)Control.InputAccessoryView;
var doneBtn = toolbar.Items[1];
doneBtn.Clicked -= DoneBtn_Clicked;
}
if (e.NewElement != null)
{
var toolbar = (UIToolbar)Control.InputAccessoryView;
var doneBtn = toolbar.Items[1];
doneBtn.Clicked += DoneBtn_Clicked;
}
}
void DoneBtn_Clicked(object sender, EventArgs e)
{
Console.WriteLine("DoneBtn_Clicked");
}
}
}
參考:
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