免责声明:文章为个人理解,源码皆为测试,本人不对其使用产生的后果负任何责任。
测试源码:http://files.cnblogs.com/sunjunlin/SimpleMvvm-WindowsPhoneNav.zip
step1 :建立uri映射,如下
在app.xaml加入
"Locator" />
"UriMapper">
"" MappedUri="/MainPage.xaml"/>
"/{pageName}" MappedUri="/Views/{pageName}.xaml"/>
step 2,在代码中设置uri
在app.xaml.cs的CompleteInitializePhoneApplication方法中加入
// STEP1: Set frame's UriMapper
var frame = (PhoneApplicationFrame)Current.RootVisual;
frame.UriMapper = (UriMapper)Current.Resources[
"UriMapper"];
step3,实现导航接口
// STEP 3: Create a MockNavigator that Implements System.Windows.Controls.INavigate
public class MockNavigator : INavigator
{
public void NavigateTo(
string pageName)
{
Debug.WriteLine(
"Navigating to " + pageName);
}
}
step 4,定义导航名称:
// STEP 4: set page name
public class PageNames
{
public const string Customer =
"CustomerView";
public const string Page2 =
"Page2";
}
step 5 传送导航器:
public CustomerViewModel CustomerViewModel
{
get {
// Specify service agent
ICustomerServiceAgent serviceAgent =
new MockCustomerServiceAgent();
//STEP 5: Create navigator
INavigator navigator = CreateNavigator();
// Create ViewModel passing service agent
return new CustomerViewModel(serviceAgent, navigator);
}
step 6:添加导航属性到view model
// STEP 6: Add an INavigate property to CustomerViewModel
public INavigator Navigator {
get;
set; }
step 7:
// STEP 7: Ctor that accepts ICustomerServiceAgent and INavigator
public CustomerViewModel(ICustomerServiceAgent serviceAgent, INavigator navigator)
{
this.serviceAgent = serviceAgent;
this.Navigator = navigator;
}
step 8:在view设置导航命令
"Click">
"{Binding NavigateToPage2Command}"/>
step 9:在view model创建导航命令
// STEP 9: Create NavigateToPage2Command
private DelegateCommand navigateToPage2Command;
public DelegateCommand NavigateToPage2Command
{
get {
return navigateToPage2Command ?? (navigateToPage2Command
=
new DelegateCommand(NavigateToPage2));
}
private set { navigateToPage2Command = value; }
}
step 10:添加导航方法,导航到指定的页面。
// STEP 10: Add a Navigate method accepting a page name
public void Navigate(
string pageName)
{
Debug.Assert(Navigator !=
null,
"INavigator not set");
Navigator.NavigateTo(pageName);
}
完。
总结:通过对 simple mvvm的使用,以下几点
1.需要用到URImapper,
2.导航可以实现不同的接口,灵活
3.导航在使用时,可以在直接创建navigator
如:
public void InitNavigator()
{
INavigator navigator = new Navigator();
this.Navigator = navigator;
}
4.导航如果有参数,则需要在各个view model中切换,这时可以发送消息。(这一点,如果有更好的方法请留言告诉我,谢谢)。
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