protected override void OnBindingContextChanged()
{
base.OnBindingContextChanged();
if (BindingContext != null)
{
_viewModel = BindingContext as NativeFacebookPageViewModel;
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Page> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
var pageElement = this.Element as NativeFacebookPage;
if (pageElement != null)
{
viewModel = pageElement.ViewModel;
}
try
{
InitializedFB();
}
catch (System.Exception ex)
{
}
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
if (this.Element is NativeFacebookPage pageElement)
{
viewModel = pageElement.ViewModel;
}
Profile.Notifications.ObserveDidChange(Profile_Changed);
// Login Button Setup
loginView = new LoginButton();
var frame = new CGRect();
frame.Width = 218;
frame.X = (UIScreen.MainScreen.Bounds.Width - frame.Width) / 2;
frame.Height = 46;
frame.Y = 310;
loginView.Frame = frame;
loginView.LoginBehavior = LoginBehavior.Native;
loginView.ReadPermissions = readPermissions.ToArray();
loginView.Completed += LoginView_Completed;
loginView.LoggedOut += LoginView_LoggedOut;
// The user image profile is set automatically once is logged in
// Create the label that will hold user's facebook name
// PictureView Setup
var picFrame = new CGRect();
picFrame.Width = 220;
picFrame.Height = 220;
picFrame.X = (UIScreen.MainScreen.Bounds.Width - frame.Width) / 2;
picFrame.Y = 70;
pictureView = new ProfilePictureView(picFrame);
// Label Setup
var labelFrame = new CGRect();
labelFrame.Width = 220;
labelFrame.Height = 21;
labelFrame.Y = 50;
labelFrame.X = (UIScreen.MainScreen.Bounds.Width - labelFrame.Width) / 2;
nameLabel = new UILabel(labelFrame)
{
TextAlignment = UITextAlignment.Center,
BackgroundColor = UIColor.Clear
};
// If you have been logged into the app before, ask for the your profile name
if (AccessToken.CurrentAccessToken != null)
{
ProcessFBInfo();
}
// Add views to main view
View.AddSubview(loginView);
View.AddSubview(pictureView);
View.AddSubview(nameLabel);
}
