Added awakeFromNib call for superview.

GreatReader/DocumentCollectionViewCell.m

@@ -24,13 +24,14 @@ @implementation DocumentCollectionViewCell
 
 - (void)awakeFromNib
 {
+    [super awakeFromNib];
     CGFloat scale = [UIScreen mainScreen].scale;
     self.imageView.layer.borderWidth = 1.0 / scale;
     self.imageView.layer.borderColor = UIColor.blackColor.CGColor;
     self.selectionView.hidden = !self.selected;
     self.selectionView.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.5];
     self.selectionView.layer.borderWidth = 1.0 / scale;
-    self.selectionView.layer.borderColor = UIColor.blackColor.CGColor;    
+    self.selectionView.layer.borderColor = UIColor.blackColor.CGColor;
 }
 
 - (void)setDocument:(PDFDocument *)document

GreatReader/DocumentListCollectionView.m

@@ -18,6 +18,7 @@ @implementation DocumentListCollectionView
 
 - (void)awakeFromNib
 {
+    [super awakeFromNib];
     self.emptyTitleLabel.text = LocalizedString(@"home.no-books");
     self.emptyDescriptionLabel.text = LocalizedString(@"home.no-books-description");
 }

GreatReader/DocumentTableViewCell.m

@@ -20,6 +20,7 @@ @implementation DocumentTableViewCell
 
 - (void)awakeFromNib
 {
+    [super awakeFromNib];
     CGFloat scale = UIScreen.mainScreen.scale;
     self.imageView.layer.borderWidth = 1.0 / scale;
 }

GreatReader/PDFDocumentPageSlider.m

@@ -58,6 +58,7 @@ @implementation PDFDocumentPageSlider
 
 - (void)awakeFromNib
 {
+    [super awakeFromNib];
     self.knobView = [[PDFDocumentPageSliderKnobView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
     [self addSubview:self.knobView];