Xamarin.forms 如何在许多条目中聚焦和取消聚焦
我有这个看法Xamarin.forms 如何在许多条目中聚焦和取消聚焦,xamarin.forms,Xamarin.forms,我有这个看法 <Entry Placeholder="Name" WidthRequest="200" Text=""> <Entry.Triggers> <EventTrigger Event="Focused"> <local:SizeText />
<Entry Placeholder="Name" WidthRequest="200" Text="">
<Entry.Triggers>
<EventTrigger Event="Focused">
<local:SizeText />
</EventTrigger>
</Entry.Triggers>
</Entry>
我的工作不适合我,我怎样才能提升自己?试试这个:
我不确定您想要哪种解决方案,有两种方法可以更改条目的背景颜色 一个是设计方法,使用可以很容易做到,看看这个 一个简单的触发器可以纯粹用XAML表示,向控件的触发器集合添加一个触发器元素。此示例显示了一个触发器,该触发器在接收焦点和取消焦点时更改条目背景颜色:
<Entry Placeholder="Trigger effect">
<Entry.Triggers>
<Trigger TargetType="Entry"
Property="IsFocused"
Value="True">
<Setter Property="BackgroundColor"
Value="Yellow" />
<!-- multiple Setters elements are allowed -->
</Trigger>
<Trigger TargetType="Entry"
Property="IsFocused"
Value="False">
<Setter Property="BackgroundColor"
Value="Gray" />
</Trigger>
</Entry.Triggers>
</Entry>
我将展示它们的效果,在第一次点击它们之前,它们之间会有一些不同。详情如下:
注意:选择哪一个取决于您的场景。不工作意味着出了什么问题?
<Entry Placeholder="Trigger effect">
<Entry.Triggers>
<Trigger TargetType="Entry"
Property="IsFocused"
Value="True">
<Setter Property="BackgroundColor"
Value="Yellow" />
<!-- multiple Setters elements are allowed -->
</Trigger>
<Trigger TargetType="Entry"
Property="IsFocused"
Value="False">
<Setter Property="BackgroundColor"
Value="Gray" />
</Trigger>
</Entry.Triggers>
</Entry>
<Entry Placeholder="Focused / Unfocused method" Focused="Entry_Focused" Unfocused="myentry_Unfocused"/>
private void Entry_Focused(object sender, FocusEventArgs e)
{
var entry = sender as Xamarin.Forms.Entry;
entry.BackgroundColor = Color.Red;
}
private void myentry_Unfocused(object sender, FocusEventArgs e)
{
var entry = sender as Xamarin.Forms.Entry;
entry.BackgroundColor = Color.Gray;
}