Custom UIView in swift

Question

I am creating a custom UIView that should contain a UIImageView and a UILabel here is the class for it.

import UIKit

class AnswersCustomView: UIView {
    var myImageView = UIImageView()
    var myLabel = UILabel()
    override init (frame : CGRect) {
        super.init(frame : frame)
        backgroundColor = UIColor.blueColor()
        addLabel()
        bringSubviewToFront(myLabel)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    func addLabel(){
        let myViewFrame = self.frame
        myLabel.frame = myViewFrame
        myLabel.backgroundColor = UIColor.redColor()
        myLabel.center=self.center

        addSubview(myLabel)
    }


}

whenever I create an instance of this view from a UIViewController . the UIView get added but it seems that the UILabel is not. any reason for that?

Answer 1

As already pointed out in the comment one problem could be that the label has an incorrect frame.
As stated in Apple documentation the frame is:

This rectangle defines the size and position of the view in its superview's coordinate system. You use this rectangle during layout operations to size and position the view. Setting this property changes the point specified by the center property and the size in the bounds rectangle accordingly. The coordinates of the frame rectangle are always specified in points.

The label you created is subview of the instance AnswersCustomView , not the AnswersCustomView superview, so you should set the label's frame as its superview bounds.

The other one is autolayout: you are not using it. I don't know how you create the AnswerView, bit if its initial frame is zero your label will remain zero, you should add it and set constraints or at least autoresizing masks.
Another one can be if you are creating the view in a xib, in this case iniWithCoder is called and here you are not placing any label.

To simplify views debugging Apple has added a new tool that displays your view hierarchy in 3d https://www.raywenderlich.com/98356/view-debugging-in-xcode-6