How to set full width image inside UIScrollView in swift - ios

Question

I need to display large content in my UIViewController added in Storyboard so I added UIScrollView with constraints top, right, bottom, left:0 ( to make it full screen ).
In top of UIScrollView I need a square image with its width as device screen size, so I added UIImageView with constraints : aspect ratio->1:1, top:0, centre align in container, height : 100.
And below It there is a UILabel where I want to show large text. I am using Auto Layout.
Is there an option to do this in Storyboard ?
In swift I tried below
Connected Image in controller file as :
#IBOutlet weak var eventThumb: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// set image path from url ,it works
eventThumb.image = UIImage(data: NSData(contentsOfURL: NSURL(string: self.event!.image)!)!)
let screenSize: CGRect = UIScreen.mainScreen().bounds
eventThumb.frame = CGRectMake( 0, 0, screenSize.width, screenSize.width)
}
I tried related answers given here ,here and here but they not seem to working in my case.
I am new in swift and ios, am I doing something wrong in structure ?
Edit :
Image added

Answer 1

Call it in:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
// your layout code goes here, AFTER the call to super
}
You forgot to call super before your code.

Answer 2

You had tried to make the frame with following screen size
eventThumb.frame = CGRectMake( 0, 0, screenSize.width, screenSize.width)
Please crosscheck it with
eventThumb.frame = CGRectMake( 0, 0, screenSize.width, screenSize.height)

Answer 3

Simply Try this Steps:
First Remove all red lines here you can see in Image
Now keep that line as it is, where you are setting a frame of Imageview
Note:
I already tried this solution in swift & worked for me. I hope it will work for you.
Edited:
As you mentioned you are using Auto layout, So no need to disable it. Just do 1 thing
Put the line which you are setting up the frame of image view in this method:
-(void)viewDidLayoutSubviews