How we set constraint for adding subview

Question

I want to add view on my View, but they are not set well this width stretch. I am new to iOS. Any help would be appreciated. This is what I get when I try to do what I want, can someone help to fix this:

   openView.translatesAutoresizingMaskIntoConstraints = false
        let topConstraint = NSLayoutConstraint(item: openView, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1, constant: 0)
        let bottomConstraint = NSLayoutConstraint(item: openView, attribute: .bottom, relatedBy: .equal, toItem: self, attribute: .bottom, multiplier: 1, constant: 0)
        let leadingConstraint = NSLayoutConstraint(item: openView, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leading, multiplier: 1, constant: 0)
        let trailingConstraint = NSLayoutConstraint(item: openView, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailing, multiplier: 1, constant: 0)

        self.view.addSubview(openView)
       openView.addConstraints([topConstraint, bottomConstraint, leadingConstraint, trailingConstraint])
        openView.layoutIfNeeded()

Vivek Gajbe · Accepted Answer · 2016-12-28 09:53:00Z

2

In your xcode open main.Storyboard --> Open your viewController -->Add UIView --> Make your view frame like you want --> And add constraints

Ex: If you want width=600 & height=600, set frame like you want and then assign constraints.

.Refer linked image for reference

edited Dec 28, 2016 at 9:53

answered Dec 28, 2016 at 6:59

Vivek Gajbe

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Vivek Gajbe Over a year ago

Hey i have just edit my answer refer it .It will solve your problem.

Ajith K Jose · Accepted Answer · 2016-12-28 07:07:49Z

0

Here you are setting subview's frame as the initial frame of controller view. ie, the controller's view will be fully covered by subview.

If you want to add constraints,

1) Take the storyboard or xib.

2) Tap on the UI element.

3) Tap on the constraints button as shown in image.

4) Set the values from each border.

You can also set height, width such like parameters. The whole need is the system should be able to interpret the accurate position from the constraints.

answered Dec 28, 2016 at 7:07

Ajith K Jose

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3 Comments

pashu Tomar Over a year ago

I want to set full view.

Ajith K Jose Over a year ago

Then set the constraints to 0 for each side.

pashu Tomar Over a year ago

It is no my xib it seperate view . there is no option for setting constarint

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