image view not scrollable in scrollview and not fit properly using pure layout

Question

I'm simply trying to place an image into scroll view which is in a main view using purelayout.

And what i'm taking right now is;

sample image

Note that view with red background is scroll view. And also the image is not scrollable.

    - (void)loadView {
        self.view = [[UIView alloc] init];

        [self.scrollView addSubview:self.photoView];        
        [self.view addSubview:self.scrollView];
        [self.view setNeedsUpdateConstraints];
    }

    - (void)updateViewConstraints {

        if (!_didSetupConstraints) {
            ...
            ...
            ...
            [self.photoView autoPinEdgeToSuperviewEdge:ALEdgeTop];
            [self.photoView autoPinEdgeToSuperviewEdge:ALEdgeBottom];
            [self.photoView autoPinEdgeToSuperviewEdge:ALEdgeLeft];
            [self.photoView autoPinEdgeToSuperviewEdge:ALEdgeRight];

            self.didSetupConstraints = YES;
        }

        [super updateViewConstraints];
    }

    - (UIImageView *)photoView {
        if (!_photoView) {
            _photoView = [UIImageView newAutoLayoutView];
            _photoView.backgroundColor = [UIColor whiteColor];
        }
        return _photoView;
    }

    - (UIScrollView *)scrollView {
        if (!_scrollView) {
            _scrollView = [UIScrollView newAutoLayoutView];
            _scrollView.backgroundColor = [UIColor redColor];
            _scrollView.maximumZoomScale = 2.0;
            _scrollView.minimumZoomScale = 0.5;
        }
        return _scrollView;
    }

Have you tried `_photoView.userInteractionEnabled = YES;`? – Fennelouski May 15 '15 at 18:01 — Fennelouski, May 15 '15 at 18:01
Sorry tried it now, but it didn't solve anything. – Eray Diler May 15 '15 at 18:15 — Eray Diler, May 15 '15 at 18:15

score 0 · Accepted Answer · answered May 15 '15 at 19:07

Ok, it seems working well with two changes i did.

Firstly i set self.photoView size manually.

[self.photoView autoSetDimensionsToSize:CGSizeMake([HelperModel screenWidth], [HelperModel screenHeight] -[HelperModel viewHeight:self.navigationController.navigationBar] -20.0)];

HelperModel.m

@implementation HelperModel

+ (CGFloat)screenWidth {
    return [[UIScreen mainScreen] bounds].size.width;
}

+ (CGFloat)screenHeight {
    return [[UIScreen mainScreen] bounds].size.height;
}

+ (CGFloat)viewHeight:(UIView *)view {
    return CGRectGetHeight(view.frame);
}

+ (CGFloat)photoDetailHeight {
    return [HelperModel screenHeight] -20;
}

@end

Secondly,

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

for zooming feature and if the zoomed image exceeds the bounds of scroll view, then the image can be scrolled properly.

image view not scrollable in scrollview and not fit properly using pure layout

1 Answers1