public void CurrentItem(int index, bool animated)
{
var showItem = CreatItem(index);
ShowItemView(showItem, ShowDuration);
HideItemView(currentItem, HideDuration);
currentItem = showItem;
}
private void HideItemView(OnboardingContentViewItem item, double duration)
{
if (item == null)
{
return;
}
item.DescriptionBottomConstraint.Constant -= DyOffsetAnimation;
item.TitleCenterConstraint.Constant *= 1.3f;
UIView.Animate(duration, 0, UIViewAnimationOptions.CurveEaseOut,
() =>
{
item.Alpha = 0;
this.LayoutIfNeeded();
}, () =>
{
item.RemoveFromSuperview();
});
}
private void ShowItemView(OnboardingContentViewItem item, double duration)
{
item.DescriptionBottomConstraint.Constant = DyOffsetAnimation;
item.TitleCenterConstraint.Constant /= 2;
item.Alpha = 0;
LayoutIfNeeded();
item.DescriptionBottomConstraint.Constant = 0;
item.TitleCenterConstraint.Constant *= 2;
UIView.Animate(duration, 0, UIViewAnimationOptions.CurveEaseOut,
() =>
{
item.Alpha = 0;
item.Alpha = 1;
this.LayoutIfNeeded();
}, () =>
{
});
}
private OnboardingContentViewItem CreatItem(int index)
{
var info = _delegate?.OnboardingItemAtIndex(index);
if (info == null)
{
return(OnboardingContentViewItem.ItemOnView(this));
}
var item = OnboardingContentViewItem.ItemOnView(this);
item.ImageView.Image = info.InformationImage;
item.TitleLabel.Text = info.Title;
//item.TitleLabel.Font = info.TitleFont;//Ignore by now
item.TitleLabel.TextColor = info.TitleColor;
item.DescriptionLabel.Text = info.Description;
//item.DescriptionLabel.Font = info.DescriptionFont;
item.DescriptionLabel.TextColor = info.DescriptionColor;
_delegate?.OnboardingConfiguration(item, index);
return(item);
}
public static OnboardingContentViewItem ItemOnView(UIView view)
{
var item = new OnboardingContentViewItem(CoreGraphics.CGRect.Empty);
item.BackgroundColor = UIColor.Clear;
item.TranslatesAutoresizingMaskIntoConstraints = false;
view.AddSubview(item);
//Add constraints
item.ConstraintOps((obj) =>
{
obj.Attribute = NSLayoutAttribute.Height;
obj.Constant = 10000;
obj.Relation = NSLayoutRelation.LessThanOrEqual;
});
(view, item).ConstraintOps((obj) => obj.Attribute = NSLayoutAttribute.Leading);
(view, item).ConstraintOps((obj) => obj.Attribute = NSLayoutAttribute.Trailing);
(view, item).ConstraintOps((obj) => obj.Attribute = NSLayoutAttribute.CenterX);
(view, item).ConstraintOps((obj) => obj.Attribute = NSLayoutAttribute.CenterY);
return(item);
}
public virtual void OnboardingConfigurationItem(OnboardingContentViewItem item, int index)
{
}
private void Initialize()
{
currentItem = CreatItem(0);
}
public abstract void OnboardingConfiguration(OnboardingContentViewItem item, int index);
