CODEWITHSUNDEEP
iosswiftautolayoutconstraints
Vijay Kharage
Vijay Kharage

Reputation: 411

How to get CGFloat value from NSLayoutConstraints?

I am working on screen where I want to make this profile view circular. But I am not getting height or width from imageView.frame.height to use it in layer.cornerRadius. Please help me. Thanks.

enter image description here

Here is the code for reference.

private func addImageView() {
        topView.addSubview(profilePicView)

        NSLayoutConstraint.activate([
            profilePicView.centerXAnchor.constraint(equalTo: topView.centerXAnchor),
            profilePicView.widthAnchor.constraint(equalTo: topView.heightAnchor, multiplier: 0.3)
            ])

        profilePicViewTopAnchor = profilePicView.topAnchor.constraint(equalTo: view.topAnchor, constant: 64)
        profilePicViewTopAnchor?.isActive = true

        profilePicViewHeightAnchor = profilePicView.heightAnchor.constraint(equalTo: topView.heightAnchor, multiplier: 0.3)
        profilePicViewHeightAnchor?.isActive = true
    }

And I am trying to get values as,

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        print((profilePicViewHeightAnchor?.constant)!)
        profilePicView.layer.cornerRadius = (profilePicViewHeightAnchor?.constant)! / 2
        profilePicView.clipsToBounds = true

    }

SOLVED

After everyones help I got this solution which works perfectly fine for me,

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()

        let radius = redView.frame.height * 0.3
        profilePicView.layer.cornerRadius = radius / 2
        profilePicView.clipsToBounds = true

        self.view.layoutIfNeeded()

    }

Thanks to all you guys. Really appreciated the help.

Upvotes: 5

Views: 2760

Answers (5)

kokila
kokila

Reputation: 26

you can Also use ViewDidAppear.because at this time Autolayout engine started to layout Constraint.

override func viewDidAppear() {
    super.viewDidAppear()
    print(imageView.frame.height)
}

Upvotes: 0

Saurabh Jain
Saurabh Jain

Reputation: 1698

Try this extension: 

 extension UIView {

        @IBInspectable
        /// Should the corner be as circle
        public var circleCorner: Bool {
            get {
                return min(bounds.size.height, bounds.size.width) / 2 == cornerRadius
            }
            set {
                cornerRadius = newValue ? min(bounds.size.height, bounds.size.width) / 2 : cornerRadius
            }
        }
    }

Upvotes: -1

Kamran
Kamran

Reputation: 15248

This must be because the time you are accessing the frame for imageView, the layout constraints are not laid out by the autolayout. So, If your imageView is inside a UIViewController class then you should override the below method and then access the width and height.

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    print(imageView.frame.height)
}

If imageView is inside a custom view then you can override the below method and then access the frame,

override func layoutSubviews() {
    super.layoutSubviews()

    print(imageView.frame.height)
}

Upvotes: 6

Kathiresan Murugan
Kathiresan Murugan

Reputation: 2962

You can try to set in storyboard on identifier inspector. like

enter image description here

Upvotes: 0

Sanjukta
Sanjukta

Reputation: 1055

Please try this it helps to you.

imageView.layer.cornerRadius =  imageView.frame.size.height / 2
imageView.clipsToBounds = true

Make sure your height and width of imageView is same. Thanks

Upvotes: 0

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