About button binding

[mimimiaomiao1]

View.ActionTarget not set on control System.Windows.Controls.Button: (method Login). This probably means the control hasn't inherited it from a parent, e.g. because a ContextMenu or Popup sits in the visual tree. You will need so set 's:View.ActionTarget' explicitly. See the wiki section "Actions" for more details.”

The main page can be used. Sub pages cannot be used...

[mimimiaomiao1]

`<Button Content="{Binding SwitchLoginPageContent,Mode=TwoWay}" Command="{s:Action Login}"
The main page can be used. Sub pages cannot be used

`

[canton7]

Please post a full sample which reproduces your issue. I don't know what "sub psages cannot be used" means.