Unable to see subview inside UIScrollView through programatically constraints

Question

I'm trying to add UIView inside UIScrollView using programatically constraints but i think due to constraints missing I'm unable to see UIView. When i tried to add by CGRectMake its working fine also i checked with below code, in view hierarchy there is view inside UIScrollview.

I tried no. of solutions but didn't get any success

UIScrollView with iOS Auto Layout Constraints: Wrong size for subviews

Programmatically creating controller with UIScrollView and AutoLayout is not sizing the views properly

Here is my code

    vendorDetailsScrollView = UIScrollView()
    vendorDetailsScrollView!.translatesAutoresizingMaskIntoConstraints = false
    vendorDetailsScrollView!.backgroundColor = UIColor.redColor()
    self.view.addSubview(vendorDetailsScrollView!)

    vendorSubView = UIView()
    vendorSubView!.translatesAutoresizingMaskIntoConstraints = false
    vendorSubView!.backgroundColor = UIColor.greenColor()
    self.vendorDetailsScrollView!.addSubview(vendorSubView!)

    viewDictionary!["vendorDetailsScrollView"] = vendorDetailsScrollView!
    viewDictionary!["vendorSubView"] = vendorSubView!

    metricDictionary!["navigationHeight"] = navigationHeight
    metricDictionary!["vendorDetailsScrollViewHeight"] = self.view.frame.size.height  - navigationHeight
    metricDictionary!["vendorSubViewHeight"] =  100

    self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("|[vendorDetailsScrollView]|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary!, views: viewDictionary!))

    self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-navigationHeight-[vendorDetailsScrollView(vendorDetailsScrollViewHeight)]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary!, views: viewDictionary!))

    self.vendorDetailsScrollView!.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("|-[vendorSubView]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary!, views: viewDictionary!))

    self.vendorDetailsScrollView!.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-[vendorSubView(vendorSubViewHeight)]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary!, views: viewDictionary!))

Your vendorDetailsScrollView and vendorSubView variables aren't Optional, so don't use ! to unwrap them. — NRitH
– NRitH, Commented Apr 18, 2016 at 12:31

Jitendra Gaur · Accepted Answer · 2016-06-29 12:49:26Z

2

You need to add the following code

self.vendorDetailsScrollView.addConstraint(NSLayoutConstraint(item: vendorSubView, attribute: .Width, relatedBy: .Equal, toItem: vendorDetailsScrollView, attribute: .Width, multiplier: 1.0, constant: 0))

instead of

self.vendorDetailsScrollView!.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("|-[vendorSubView]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary!, views: viewDictionary!))

answered Jun 29, 2016 at 12:49

Jitendra Gaur

7784 silver badges16 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Kalpesh · Accepted Answer · 2016-04-18 12:39:43Z

0

Add a view as a child inside your vendorDetailsScrollView then add all your subviews inside the child view.

answered Apr 18, 2016 at 12:39

Kalpesh

4,0394 gold badges21 silver badges29 bronze badges

1 Comment

Shrikant K Over a year ago

hi vendorSubView m trying to add as subview its also adding but im unable to see.

Collectives™ on Stack Overflow

Unable to see subview inside UIScrollView through programatically constraints

2 Answers 2

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related