That’s expected, because the IBOutlet(s) are not assigned by the time the initializer is called. Instead of calling commonInit() in init(coder:), do that in an override of awakeFromNib as follows: // … required init(coder aDecoder: NSCoder) { super.init(coder: aDecoder) } override func awakeFromNib() { super.awakeFromNib() commonInit() } // …
Updated again for Swift 4 & removed a few items to make the code tighter. Please note that maskLayer.fillRule is set differently between Swift 4 and Swift 4.2. func createOverlay(frame: CGRect, xOffset: CGFloat, yOffset: CGFloat, radius: CGFloat) -> UIView { // Step 1 let overlayView = UIView(frame: frame) overlayView.backgroundColor = UIColor.black.withAlphaComponent(0.6) // Step 2 let … Read more
You can use the UIView method isDescendantOfView: if mySubview.isDescendant(of: someParentView) { mySubview.removeFromSuperview() } else { someParentView.addSubview(mySubview) } You may also need to surround everything with if mySubview != nil depending on your implementation.
Use this to hide a view in swift viewVar.isHidden = true
Check UIBezierPath setLineDash:count:phase: method: – (void)setLineDash:(const CGFloat *)pattern count:(NSInteger)count phase:(CGFloat)phase` method. This allows you to draw dashed lines. First add a CAShapeLayer. Add it as sublayer to your UIView. It has a path property. Now make an object of UIBezierPath. Draw the line using setLineDash. For example: UIBezierPath *path = [UIBezierPath bezierPath]; //draw a line … Read more
Making the effect is simple. You take the full-sized view, initialize its transform and center to position it on top of the thumbnail, add it to the appropriate superview, and then in an animation block reset the transform and center to position it in the final position. To dismiss the view, just do the opposite: … Read more
The problem is the responder chain. When you touch the display it will go down from the parents to the childen. So .. when you touch the screen the parent will see that the touch is outside of it’s own bounds and so the children will not even asked. The function that does that is … Read more
You can use willMoveToSuperview: and didMoveToSuperview to detect when the view is moved around. layoutSubviews will be called when the superview changes frame.
Autoresizing does not mean that the subview will take up the size of its superview. It just means that it will resize relative to the size change of its superview whenever the superview’s bounds change. So initially, you have to set the size of the subview to the correct value. The autoresizing mask will then … Read more
Add this and you are good to go: override func viewDidLayoutSubviews() { println(self.view1.frame.size) } you can look at width or height as you please.