CODEWITHSUNDEEP
iosobjective-cuiscrollview
MSU_Bulldog
MSU_Bulldog

Reputation: 3519

UIScrollView ContentSize height too large

I have a UIScrollView that should only scroll horizontally. The scroll view is pinned to the bottom of the screen. I have set auto layout constraints to a fixed height. I set the contentSize to a fixed size.

However, when I run the application the content is showing half of it off the bottom of the screen. And it will scroll vertically for what seems to be about 200 pixels.

I have a map and a label pinned above the scroll view and the layout looks exactly as I want, except the content of the scroll view seems off. This is the code I've written:

in my .h file:

@interface MapViewController : UIViewController <UIScrollViewDelegate>

in viewDidLoad:

self.scrollView.delegate = self;
[self.scrollView setContentSize:CGSizeMake(600, 100)];

// add some content
UIView *personView = [[UIView alloc] initWithFrame:CGRectMake(0, 8, 100, self.scrollView.frame.size.height-16)];
personView.backgroundColor = [UIColor cyanColor];

UIView *personView2 = [[UIView alloc] initWithFrame:CGRectMake(110, 8, 100, self.scrollView.frame.size.height-16)];
personView2.backgroundColor = [UIColor redColor];

UIView *personView3 = [[UIView alloc] initWithFrame:CGRectMake(220, 8, 100, self.scrollView.frame.size.height-16)];
personView3.backgroundColor = [UIColor blueColor];

UIView *personView4 = [[UIView alloc] initWithFrame:CGRectMake(330, 8, 100, self.scrollView.frame.size.height-16)];
personView4.backgroundColor = [UIColor orangeColor];

[self.scrollView addSubview:personView];
[self.scrollView addSubview:personView2];
[self.scrollView addSubview:personView3];
[self.scrollView addSubview:personView4];

I don't use UIScrollView that often, so am I missing something? Does anyone know where the sizing problem could be coming from?

Also I did an NSLog on the frame height and contentSize height and both equal 100.

Edit:

This view is in a navigation controller and I set the navigation bar from hidden = YES to hidden = NO on first load. I've noticed that the content height is different when I leave it hidden, so this must have something to do with it.

Upvotes: 0

Views: 2529

Answers (1)

Hanny
Hanny

Reputation: 1342

Try to set your scrollView's Content size int "viewDidLayoutSubviews" method with keeping the autolayouts set.

-(void)viewDidLayoutSubviews
{
  [self.scrollView setContentSize:CGSizeMake(required_width, required_height)];
}

Check the Navigation Bar set to the ViewController in the Storyboard as well. If there is any, try removing it.

And please lemme know if you still face some problem.

Upvotes: 3

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