如何为嵌套在自定义控件中的条目设置焦点?
PackageCode.xaml
<ContentView xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Name="this"
x:Class="Views.Controls.PackageCode">
<Entry x:Name="txtPackageCode" Completed="txtPackageCode_Completed"> </Entry>
我尝试过使用txtPackageCode.Focus((;
public PackageCode()
{
InitializeComponent();
txtPackageCode.Focus();
}
嵌套在我的Main.xaml 中
<ContentPage.Content>
<StackLayout>
<Label Text="Welcome to Xamarin.Forms!"
VerticalOptions="CenterAndExpand"
HorizontalOptions="CenterAndExpand" />
<local:PackageCode ></local:PackageCode>
<Button Text="ClickMe"
Clicked="Button_Clicked" ></Button>
</StackLayout>
</ContentPage.Content>
以及如何在我的Main.xaml中提取此条目的值?
在PackageCode
中添加一个公共方法
public void Focus()
{
txtPackageCode.Focus();
}
然后从Main
调用
public override void OnAppearing()
{
// you will need to assign an x:Name in the XAML
packageCode.Focus();
}
protected override async void OnAppearing()
{
base.OnAppearing();
await Task.Delay(1);
packageCode.SetFocus();
}
这起到了作用。将焦点设置为Xamarin.Forms 中的条目