UIImageview not showing after being added to another subview which is UIScrollview - ios

Question

I am creating a view controller in code only, NO .xib or storyboard.
I have many other subviews added to the view, which are added in a method (void)loadView and their frames are initialised in the (id)init method as shown below
-(id)init{
bottomClinkRect = CGRectMake(playersBoardRect.origin.x + (playersBoardWidth * 0.320),
playersBoardRect.origin.y + playersBoardHeight - playerBottomImageRect.size.height - (playersBoardHeight * 0.038),
playersBoardWidth * 0.680,
playersBoardHeight * 0.038);
}
- (void)loadView {
bottomClink = [[UIScrollView alloc]initWithFrame:bottomClinkRect];
[bottomClink setScrollEnabled:YES];
bottomClink.contentSize = CGSizeMake(bottomClink.frame.size.height,bottomClink.frame.size.height);
[contentView addSubview:bottomClink];
}
I create empty scrollview and then based on user actions on screen I am trying to add one imageView per time to the scrollview using the following method:
-(void)reloadCollections:(NSNotification *)notification
{
UIImage *latestPieceCaptured = [gameController capturedBlackPiecesImages].lastObject;
[whitePlayerCaptures addObject:latestPieceCaptured];
NSInteger newNumberOfViews = whitePlayerCaptures.count;
CGFloat xOrigin = (newNumberOfViews - 1) * bottomClink.frame.size.height;
CGRect imageRect = CGRectMake(bottomClink.frame.origin.x + xOrigin,
bottomClink.frame.origin.y,
bottomClink.frame.size.height, //the width is taken from the height
bottomClink.frame.size.height); // the height
UIImageView *image = [[UIImageView alloc] initWithFrame:imageRect];
image.backgroundColor = [UIColor blackColor];
image.image = latestPieceCaptured;
image.contentMode = UIViewContentModeScaleAspectFit;
//set the scroll view content size
bottomClink.contentSize = CGSizeMake(bottomClink.frame.size.height * newNumberOfViews,
bottomClink.frame.size.height);
[bottomClink addSubview:image];
}
My problem is that the scrollview is added to the main view but the imageview(s) are not showing up.
I have debugged it and the scrollview has the subviews added and they have frame size and all, but not showing on the screen. I have tried so many variations but nothing has worked so far.
Thanks in advance for any links or advice.

Answer 1

That works for me:
- (void)addImagesToScrollView {
[self.scrollViewOutlet setAlwaysBounceVertical:NO];
_scrollViewOutlet.delegate = self;
for (int i = 0; i < thumbnailPreview.count; i++) {
CGFloat xOrigin = i * self.scrollViewOutlet.frame.size.width;
UIImageView *image = [[UIImageView alloc] initWithFrame:
CGRectMake(xOrigin, 0,
self.scrollViewOutlet.frame.size.width,
self.scrollViewOutlet.frame.size.height)];
image.image = [UIImage imageNamed: [thumbnailPreview objectAtIndex:i]];
image.contentMode = UIViewContentModeScaleAspectFill;
image.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;
image.clipsToBounds = YES;
[self.scrollViewOutlet addSubview:image];
}
//set the scroll view content size
self.scrollViewOutlet.contentSize = CGSizeMake(self.scrollViewOutlet.frame.size.width *
thumbnailPreview.count,
self.scrollViewOutlet.frame.size.height);
}
And call it in
- (void)viewDidAppear:(BOOL)animated