private async void Login()
{
var vm = new LoginPageViewModel();
if (await vm.Show())
{
this.NavigationService.ClearHistory();
this.NavigationService.Navigate("My", null);
}
}
/// <summary>
/// 判断登录状态
/// 如果未登录，则弹出登录界面
/// </summary>
/// <returns></returns>
protected async Task <bool> RequireLogin()
{
if (this.CurrentUser.IsLogin)
{
return(true);
}
var vm = new LoginPageViewModel();
return(await vm.Show());
}