CODEWITHSUNDEEP
iphoneiosobjective-cuiscrollviewuikit
Andy Jacobs
Andy Jacobs

Reputation: 15245

Scale a UIScrollView (not only its content)

I have UIScrollview with a couple of UIViews init.

If I scale it doesn't really scale my scrollview but it scales the content in my scrollview in a very weird way,

 _scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0f, 60.0f, self.bounds.size.width, self.bounds.size.height-60.0f)];
 [self addSubview:_scrollView];
 [_scrollView.layer setAffineTransform:CGAffineTransformScale(_scrollView.layer.affineTransform, .5, .5)];

Is it possibly to scale the scrollview in its whole and not only the content. I want to zoom it like my UIScrollView as an image and not a control.

Upvotes: 0

Views: 111

Answers (2)

Aziz
Aziz

Reputation: 612

you can do it if you add a UIScrollView inside UIScrollView and use the delegate method:

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return innerScroll;
}

and only connect the mainScroll to the delegate then add your subviews inside the innerScroll

Upvotes: 0

Mikhail Viceman
Mikhail Viceman

Reputation: 604

You can try this:

- (CGRect)zoomRectForScale:(float)scale withScrollView:(UIScrollView *)yourScrollView {

    CGRect zoomRect;

    zoomRect.size.height = [yourScrollView frame].size.height / scale;
    zoomRect.size.width  = [yourScrollView frame].size.width / scale;


    zoomRect.origin.x = (yourScrollView.theScrollView.x - zoomRect.size.width  / 2.0);
    zoomRect.origin.y = (yourScrollView.center.y - zoomRect.size.height / 2.0);

    return zoomRect;

    }

    ...

    [yourScrollView setFrame:[self zoomRectForScale:5 withScrollView:yourScrollView]];

Upvotes: 1

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