How do I change UIView Size?

I have trouble with modifying my UIView height at launch.

I have to UIView and I want one to be screen size * 70 and the other to fill the gap.

here is what I have

 @IBOutlet weak var questionFrame: UIView!
 @IBOutlet weak var answerFrame: UIView!
 let screenSize:CGRect = UIScreen.mainScreen().bounds

and

 questionFrame.frame.size.height = screenSize.height * 0.70
 answerFrame.frame.size.height = screenSize.height * 0.30

It has no effect on the app during run time. I use autolayout but I only have margins constraints...

Am I doing it all wrong?

Here you go. this should work.

questionFrame.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height * 0.7) 

answerFrame.frame =  CGRectMake(0 , self.view.frame.height * 0.7, self.view.frame.width, self.view.frame.height * 0.3)

This can be achieved in various methods in Swift 3.0 Worked on Latest version MAY- 2019

Directly assign the Height & Width values for a view:

userView.frame.size.height = 0

userView.frame.size.width = 10

Assign the CGRect for the Frame

userView.frame =  CGRect(x:0, y: 0, width:0, height:0)

Method Details:

CGRect(x: point of X, y: point of Y, width: Width of View, height: Height of View)

Using an Extension method for CGRECT

Add following extension code in any swift file,

extension CGRect {

    init(_ x:CGFloat, _ y:CGFloat, _ w:CGFloat, _ h:CGFloat) {

        self.init(x:x, y:y, width:w, height:h)
    }
}

Use the following code anywhere in your application for the view to set the size parameters

userView.frame =  CGRect(1, 1, 20, 45)

Swift 3 and Swift 4:

myView.frame = CGRect(x: 0, y: 0, width: 0, height: 0)

Hi create this extends if you want. Update 2021 Swift 5

Create File Extends.Swift and add this code (add import foundation where you want change height)

extension UIView {
    /**
    Get Set x Position
    
    - parameter x: CGFloat
    */
    var x:CGFloat {
        get {
            return self.frame.origin.x
        }
        set {
            self.frame.origin.x = newValue
        }
    }
    /**
    Get Set y Position
    
    - parameter y: CGFloat
    */
    var y:CGFloat {
        get {
            return self.frame.origin.y
        }
        set {
            self.frame.origin.y = newValue
        }
    }
    /**
    Get Set Height
    
    - parameter height: CGFloat
    */
    var height:CGFloat {
        get {
            return self.frame.size.height
        }
        set {
            self.frame.size.height = newValue
        }
    }
    /**
    Get Set Width
    
    - parameter width: CGFloat
    */
    var width:CGFloat {
        get {
            return self.frame.size.width
        }
        set {
            self.frame.size.width = newValue
        }
    }
}

For Use (inherits Of UIView)

inheritsOfUIView.height = 100
button.height = 100
print(view.height)

How do I change UIView Size?

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