UIScrollView in Interface Builder not scrolling

Question

So I'm trying to put an image in my UI, and I've tried setting the content size.

- (void)viewDidLoad{
    //[super viewDidLoad];
    _trendingImageView.image = [UIImage imageNamed:@"trending.png"];
    [self.scrollView setContentSize:CGSizeMake(2000, 2000)];
}
-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear: animated];
    NSLog(@"VIEW WILL APPEAR BEING CALLED");
    self.rateView.notSelectedStar =[UIImage imageNamed:@"star-off.png"];
    self.rateView.fullSelectedStar = [UIImage imageNamed:@"star-on.png"];
    self.rateView.rating = self.rating;
    self.rateView.editable = YES;
    self.rateView.maxRating = 5;
    self.rateView.delegate = self;
    _pageTitleLabel.text = _pageTitle;
    //_pageScoreLabel.text = _pageScore;
    _trendingImageView.image = [UIImage imageNamed:@"trending.png"];
    _restaurantImageView.image = _restaurantImage;
    _descriptionView.text = _description;
    [self.scrollView setContentSize:CGSizeMake(2000,2000)];
}

The scrollView var is connected to a scroll view in the interface builder. This scroll view is inside another view, and it has subviews.

Why is this not scrolling?

This is the scrollView-

SCROLL VIEW : <UIScrollView: 0xac73010; frame = (0 -108; 320 676); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0xac73bd0>; layer = <CALayer: 0xac731e0>; contentOffset: {0, 0}>

Setting the delegate has nothing to do with your problem. Did you log self.scrollView to make sure it's not nil? — rdelmar, Dec 17 '13 at 06:03
You should post your project online, I will solve it for you. — KudoCC, Dec 17 '13 at 06:10
Check this link http://stackoverflow.com/questions/18058851/uiscrollview-delegate-methods-not-calling-properly/19195156#19195156 — Madhu, Dec 17 '13 at 06:12
Make sure that the scrollingEnabled and userInteractionEnabled boxes are checked in IB. Other than that, setting the contentSize to something bigger than the scroll view's frame is all you need to do. — rdelmar, Dec 17 '13 at 06:16

Nikos M. · Accepted Answer · 2013-12-17T06:07:56.903

0

Add this lines in your viewDidLoad method:

   self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 2000, 2000)];
   [self.scrollView setScrollEnabled:YES];
   [self.scrollView setClipsToBounds:YES];
   self.scrollView.delegate = self;

Also make sure that you conform to <UIScrollViewDelegate> in your .h file. Finally there is no need to set contentsize to both viewDidLoad and viewWillAppear. Leave it only in viewDidLoad.

edited Dec 17 '13 at 06:07

answered Dec 17 '13 at 06:01

Nikos M.

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The delegate has nothing to do with getting the scroll view to scroll. – rdelmar Dec 17 '13 at 06:03
wait - so do I need to implement all this? https://developer.apple.com/library/ios/documentation/uikit/reference/uiscrollviewdelegate_protocol/Reference/UIScrollViewDelegate.html – praks5432 Dec 17 '13 at 06:07
He already has a scroll view that he added in IB. Why would he create a new one? Also, if you make the frame the same size as the contentView it won't scroll. – rdelmar Dec 17 '13 at 06:07
rdelmar - do you have any ideas as to what the problem might be? – praks5432 Dec 17 '13 at 06:08
@praks5432, you might want to for other purposes, but you don't need to implement the delegate protocol to make a scroll view scroll. – rdelmar Dec 17 '13 at 06:09
If you do no not implement the delegate protocol and you use scrollView delegate methods, you will get a warning. – Nikos M. Dec 17 '13 at 06:10
ok...so I added @interface BasicCardViewController : UIViewController - is that all I need? – praks5432 Dec 17 '13 at 06:11
also, Nikos - I've already added a scroll view in interface builder - why am I allocing a new one? Instead of allocing that, I tried the other three lines - still no dice – praks5432 Dec 17 '13 at 06:12
Your scrollview as set in IB has this frame: frame = (0 -108; 320 676); y parameter is unusual. Post a screenshot from your xib file – Nikos M. Dec 17 '13 at 06:13
er..so it *looks* ok in interface builder – praks5432 Dec 17 '13 at 06:15
are you using autolayout and ios 7? – Shabir jan Dec 17 '13 at 06:16
yeah I am - I saw that, that might interfere, so I unchecked it - same problem – praks5432 Dec 17 '13 at 06:17
wait - I just tried again - that totally fixed it - but what if I want it to scroll even when I turn it sideways? – praks5432 Dec 17 '13 at 06:18
If you have your autoresizing masks correct, landscape mode shouldn't be an issue – Nikos M. Dec 17 '13 at 07:33

UIScrollView in Interface Builder not scrolling

1 Answers1