Adding a view to a page

1class FloatingView: UIView {
2    // the page on which the UIView appears
3    
4    var pageNumber: Int32 = 0
5    // the location, expressed in PDF coordinates, at which the view appears
6    var pdfPageRect: PTPDFRect?
7}

1@interface FloatingView : UIView
2// the page on which the UIView appears
3@property (assign, nonatomic) int pageNumber;
4// the location, expressed in PDF coordinates, at which the view appears
5@property (strong, nonatomic) PTPDFRect* pdfPageRect;
6@end
7@implementation FloatingView
8@end

1// prepare the new view
2let redRect = FloatingView()
3redRect.backgroundColor = UIColor.red
4redRect.pageNumber = 1
5redRect.pdfPageRect = PTPDFRect(x1: 10, y1: 10, x2: 100, y2: 100)
6// add the view to PTPDFViewCtrl's overlayView
7self.pdfViewCtrl.overlayView.addSubview(redRect)
8// position the view
9positionFloatingViews()

1// prepare the new view
2FloatingView* redRect = [[FloatingView alloc] init];
3[redRect setBackgroundColor:[UIColor redColor]];
4redRect.pageNumber = 1;
5redRect.pdfPageRect = [[PTPDFRect alloc] initWithX1:10 y1:10 x2:100 y2:100];
6// add the view to PTPDFViewCtrl's overlayView
7[self.pdfViewCtrl.overlayView addSubview:redRect];
8// position the view
9[self positionFloatingViews];

1func positionFloatingViews() {
2    for case let overlayView as FloatingView in self.pdfViewCtrl.overlayView.subviews {
3        // make sure this is a floating view
4        if type(of: overlayView) === FloatingView.self {
5            var pageHidden = false
6            if !pdfViewCtrl.pagePresentationModeIsContinuous() {
7                pageHidden = !pdfViewCtrl.pageIs(onScreen: overlayView.pageNumber)
8            }
9            overlayView.isHidden = pageHidden
10            var screenRect: CGRect = pdfViewCtrl.pdfRectPage2CGRectScreen(overlayView.pdfPageRect, pageNumber: overlayView.pageNumber)
11            screenRect.origin.x += CGFloat(pdfViewCtrl.getHScrollPos())
12            screenRect.origin.y += CGFloat(pdfViewCtrl.getVScrollPos())
13            overlayView.frame = screenRect
14        }
15    }
16}

1-(void)positionFloatingViews
2{
3    for(FloatingView* overlayView in self.pdfViewCtrl.overlayView.subviews)
4    {
5        // make sure this is a floating view
6        if( [overlayView isMemberOfClass:[FloatingView class]])
7        {
8            BOOL pageHidden = NO;
9            if( ![self.pdfViewCtrl pagePresentationModeIsContinuous] )
10            {
11                pageHidden = ![self.pdfViewCtrl pageIsOnScreen:overlayView.pageNumber];
12            }
13            overlayView.hidden = pageHidden;
14            CGRect screenRect = [self.pdfViewCtrl PDFRectPage2CGRectScreen:overlayView.pdfPageRect PageNumber:overlayView.pageNumber];
15            screenRect.origin.x += [self.pdfViewCtrl GetHScrollPos];
16            screenRect.origin.y += [self.pdfViewCtrl GetVScrollPos];
17            overlayView.frame = screenRect;
18        }
19    }
20}

1func pdfViewCtrl(onLayoutChanged pdfViewCtrl: PTPDFViewCtrl!) {
2    positionFloatingViews()
3}
4func pdfViewCtrl(_ pdfViewCtrl: PTPDFViewCtrl!, pdfScrollViewDidEndZooming scrollView: UIScrollView!, with view: UIView!, atScale scale: Float) {
5    positionFloatingViews()
6}

1-(void)pdfViewCtrlOnLayoutChanged:(PTPDFViewCtrl *)pdfViewCtrl
2{
3    [self positionFloatingViews];
4}
5-(void)pdfViewCtrl:(PTPDFViewCtrl *)pdfViewCtrl pdfScrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale
6{
7    [self positionFloatingViews];
8}