[英]How can i get notification from DatePicker and Timepicker only user presses Done button in Xamarin forms IOS
我想知道只有当用户按下Xamarin forms IOS中的完成按钮时,如何从 Datepicker 和 timepicker 获取通知。 当前,当 TimePicker 属性更改并且 DatePicker DateSelected 在选择器选择的索引发生更改时引发。
帮我解决这个问题。
当用户按下DatePicker
和TimerPicker
的完成按钮时,将触发未聚焦事件。
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");
}
您还可以使用自定义渲染器处理原生 Xamarin.iOS 项目中的点击事件,这是 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");
}
}
}
参考:
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