public static TutorialPage CreatePage(PageInfo page){
var tutorialPage = new TutorialPage { PageInfo = page };
return tutorialPage;
}
public override async void ViewDidLoad()
{
base.ViewDidLoad();
_finalize = new UIButton(UIButtonType.RoundedRect);
_finalize.BackgroundColor = _closeButtonBackgroundColor;
_finalize.SetTitleColor(_closeButtonTitleColor, UIControlState.Normal);
_finalize.Alpha = 0f;
_finalize.UserInteractionEnabled = false;
_finalize.SetTitle(_closeButtonTitle, UIControlState.Normal);
_finalize.TranslatesAutoresizingMaskIntoConstraints = false;
_finalize.Layer.CornerRadius = 6f;
_finalize.TouchUpInside += _finalize_TouchUpInside;
this.Add(_finalize);
this.View.SendSubviewToBack(_finalize);
View.AddConstraint(
NSLayoutConstraint.Create(
_finalize, NSLayoutAttribute.Leading,
NSLayoutRelation.Equal,
View, NSLayoutAttribute.Leading,
1.0f, HorizontalButtonPadding
)
);
View.AddConstraint(
NSLayoutConstraint.Create(
_finalize, NSLayoutAttribute.Trailing,
NSLayoutRelation.Equal,
View, NSLayoutAttribute.Trailing,
1.0f, -HorizontalButtonPadding
)
);
View.AddConstraint(
NSLayoutConstraint.Create(
_finalize, NSLayoutAttribute.Bottom,
NSLayoutRelation.Equal,
View, NSLayoutAttribute.Bottom,
1.0f, -VerticalButtonPadding
)
);
this.GetPreviousViewController = (pvc, vc) => {
var tutorialPage = vc as TutorialPage;
var currentIndex = _pageInfos.IndexOf(tutorialPage?.PageInfo);
return(currentIndex == 0 ? null : TutorialPage.CreatePage(_pageInfos[currentIndex - 1]));
};
this.GetNextViewController = (nvc, vc) => {
var tutorialPage = vc as TutorialPage;
var currentIndex = _pageInfos.IndexOf(tutorialPage?.PageInfo);
var isFinalPage = currentIndex + 1 == _pageInfos.Count;
BeginInvokeOnMainThread(() => {
if (isFinalPage)
{
UIView.Animate(.1d, 0d, UIViewAnimationOptions.CurveEaseIn,
() => {
View.BringSubviewToFront(_finalize);
_finalize.Alpha = 1f;
_finalize.UserInteractionEnabled = true;
},
() => {});
}
// else {
// _finalize.Alpha = 0f;
// _finalize.UserInteractionEnabled = false;
// View.SendSubviewToBack (_finalize);
// }
});
return(isFinalPage ? null : TutorialPage.CreatePage(_pageInfos[currentIndex + 1]));
};
this.GetPresentationCount = (pvc) => _pageInfos.Count;
this.GetPresentationIndex = (pvc) => 0;
await SetViewControllersAsync(
new [] { TutorialPage.CreatePage(_pageInfos[0]) },
UIPageViewControllerNavigationDirection.Forward,
false);
}