objective c - Embed ImageView in ScrollView with Auto Layout on iOS 6

Question

I am trying to make very simple element with new iOS 6 SDK with auto layout. I have an ImageView and Embed it in ScrollView. (everything build with Interface Builder). The .png file is set and imageView mode is set to "Top Left".

Implementation:

#import "ImaginariumViewController.h"

@interface ImaginariumViewController ()
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@end

@implementation ImaginariumViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.scrollView.contentSize = self.imageView.image.size;
    self.imageView.frame =
    CGRectMake(0, 0, self.imageView.image.size.width, self.imageView.image.size.height);
}

@end

When I run the app, the image is not scrolled. Doing all the same with auto layout turned off (with struts and springs), I have working scrolling. I guess the problem is with constraints. Could anybody help me, please?

Answer 1

I just encountered the same issue in a tutorial that I was updating. I attempted programmatically deleting constraints, cursing, and banging my head against the wall - no luck.

About 5 minutes ago, however, I tried something that had fixed another issue I encountered, and, ta da! UIScrollView is working again! The solution was to move the old code that sets the UIScrollView contentSize property into an implementation of viewDidAppear, rather than viewDidLoad:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    self.theScroller.contentSize=CGSizeMake(200.0,2000.0);
}

I hope this helps someone else encountering some of the headaches that have appeared with Auto Layout.