我有一个自定义内容视图,标题为Label
,另一个为Label
作为细节,编辑为Icon
;单击该图标时,详细标签将转换为Entry
进行更改,并且更改将继续进行绑定。
我已将多个自定义视图绑定到同一对象的不同属性,并尝试编辑每个视图并移至下一个视图,问题是似乎复制了各个视图
我也放了x:Name
,但它仍然与上面的视图重复相同的值..
只需编辑姓氏
现在,如果我移至第三视图并对其进行编辑,它将新值复制到所有先前编辑的值。 -对于这种情况下的姓氏,考虑到页面中使用的视图不相同,这很奇怪,并且在调试时只命中一次该方法。
自定义内容视图:
<StackLayout Orientation="Horizontal"
VerticalOptions="Start"
Padding="25,10,25,10">
<StackLayout x:Name="stackLayoutDetail"
HorizontalOptions="FillAndExpand">
<Label x:Name="title"
Text="{Binding Title}" />
<Label x:Name="detail"
Text="{Binding Detail}"
FontSize="Large"
FontAttributes="Bold" />
</StackLayout>
<Image x:Name="editIcon"
Source="edit_icon.png"
WidthRequest="25"
HeightRequest="25"
IsVisible="{Binding EditIconVisible}">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="EditIcon_Clicked" />
</Image.GestureRecognizers>
</Image>
</StackLayout>
代码背后:
private static Entry newEntry = new Entry();
public static readonly BindableProperty DetailProperty = BindableProperty.Create(propertyName: nameof(Detail),
returnType: typeof(string),
declaringType: typeof(LabelledEntrywithIcon),
defaultValue: default(string));
public string Detail
{
get
{
return (string)GetValue(DetailProperty);
}
set => SetValue(DetailProperty, value);
}
private void EditIcon_Clicked(object sender, System.EventArgs e)
{
detailLabel = (Label)stackLayoutDetail.Children[1];
stackLayoutDetail.Children.RemoveAt(1);
newEntry.Text = Detail;
stackLayoutDetail.Children.Add(newEntry);
editIcon.IsVisible = false;
newEntry.Completed += NewEntry_Completed;
}
private void NewEntry_Completed(object sender, System.EventArgs e)
{
try
{
var _newText = newEntry.Text;
detailLabel.Text = _newText;
stackLayoutDetail.Children.RemoveAt(1);
stackLayoutDetail.Children.Add(detailLabel);
Detail = _newText;
editIcon.IsVisible = true;
}
catch (System.Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
页面
<local:LabelledEntrywithIcon x:Name="firstName"
Title="First Name"
Detail="{Binding Fella.FirstName}" />
<local:LabelledEntrywithIcon x:Name="lastname"
Title="Last Name"
Detail="{Binding Fella.LastName}" />
<local:LabelledEntrywithIcon x:Name="gender"
Title="Gender"
Detail="{Binding Fella.Gender}" />
后面的代码:
ViewModel=new MainViewModel();
BindingContext = ViewModel;
要测试的完整代码在Github存储库中:https://github.com/pmahend1/CustomViewDuplicationIssue
答案 0 :(得分:0)
奇怪,但是我更改了一行代码,它现在可以按预期运行。
在类变量上,将private static Entry newEntry= new Entry();
更改为
private static Entry newEntry;
使用EditIcon_Clicked
方法代替使用的newEntry.Text = Detail;
newEntry = new Entry { Text = Detail };
我不确定为什么每个LabelledEntrywithIcon
的新条目都引用相同的引用
答案 1 :(得分:0)
您可以通过以下方法简化问题,而不是创建新条目并查找和删除标签并在其后添加新条目:
<StackLayout Orientation="Horizontal"
VerticalOptions="Start"
Padding="25,10,25,10">
<StackLayout x:Name="stackLayoutDetail"
HorizontalOptions="FillAndExpand">
<Label x:Name="title"
Text="{Binding Title}" />
<Label x:Name="detail"
Text="{Binding Detail}"
IsVisible="{Binding ShowLabel}"
FontSize="Large"
FontAttributes="Bold" />
<Entry ... IsVisible="{Binding ShowEntry}" ... />
</StackLayout>
<Image x:Name="editIcon"
Source="edit_icon.png"
WidthRequest="25"
HeightRequest="25"
IsVisible="{Binding ShowLabel}">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="EditIcon_Clicked" />
</Image.GestureRecognizers>
</Image>
</StackLayout>
请注意,我有意在入口元素内写...作为您可能要在其中进行的所有自定义(字体大小等)的占位符。
现在,添加两个BindablyProperties(类型为bool)ShowEntry和ShowLabel,其中ShowLabel默认为true,ShowEntry默认为false。 现在,您要做的就是调整您的EditIcon_Clicked事件:
private void EditIcon_Clicked(object sender, System.EventArgs e)
{
ShowLabel = false;
ShowEntry = true;
newEntry.Text = Detail;
newEntry.Completed += NewEntry_Completed;
}
并将NewEntry_Completed修改为
private void NewEntry_Completed(object sender, System.EventArgs e)
{
try
{
var _newText = newEntry.Text;
detailLabel.Text = _newText;
ShowLabel = true;
ShowEntry = false;
Detail = _newText;
}
catch (System.Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
基本上,这与您的解决方案相同,但是您不必将UI项拖到代码后方,尤其是随之而来的错误和错误。