You could use QuartzCore and do something this — self.circleView = [[UIView alloc] initWithFrame:CGRectMake(10,20,100,100)]; self.circleView.alpha = 0.5; self.circleView.layer.cornerRadius = 50; // half the width/height self.circleView.backgroundColor = [UIColor blueColor];
I can guess what might be the problem here, because I’ve done it: I’ve found that often when I add init code to loadView, I end up with an infinite stack trace Don’t read self.view in -loadView. Only set it, don’t get it. The self.view property accessor calls -loadView if the view isn’t currently loaded. … Read more
Here’s how to apply all 6 Sketch shadow properties to a UIView’s layer with near perfect accuracy: extension CALayer { func applySketchShadow( color: UIColor = .black, alpha: Float = 0.5, x: CGFloat = 0, y: CGFloat = 2, blur: CGFloat = 4, spread: CGFloat = 0) { masksToBounds = false shadowColor = color.cgColor shadowOpacity = … Read more
From the UIView reference’s section about the beginAnimations:context: method: Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block-based animation methods instead. Eg of Block-based Animation based on Tom’s Comment [UIView transitionWithView:mysuperview duration:0.75 options:UIViewAnimationTransitionFlipFromRight animations:^{ [myview removeFromSuperview]; } completion:nil];
UITableView’s backgroundView property is your friend. In viewDidLoad or anywhere that you reloadData you should determine if there your table is empty or not and update the UITableView’s backgroundView property with a UIView containing a UILabel or just set it to nil. That’s it. It is of course possible to make UITableView’s data source do … Read more
I think you are confusing subclassing with the view hierarchy. What the doc says is as follows. Say you have this view hierarchy. By hierarchy I’m not talking about class hierarchy, but views within views hierarchy, as follows: +—————————-+ |A | |+——–+ +————+ | ||B | |C | | || | |+———-+| | |+——–+ ||D … Read more
The init(frame:) version is the default initializer. You must call it only after initializing your instance variables. If this view is being reconstituted from a Nib then your custom initializer will not be called, and instead the init?(coder:) version will be called. Since Swift now requires an implementation of the required init?(coder:), I have updated … Read more
Instead of using a UIView, as @ImreKelényi suggests, you can use a CALayer: // Add a bottomBorder. CALayer *bottomBorder = [CALayer layer]; bottomBorder.frame = CGRectMake(0.0f, 43.0f, toScrollView.frame.size.width, 1.0f); bottomBorder.backgroundColor = [UIColor colorWithWhite:0.8f alpha:1.0f].CGColor; [toScrollView.layer addSublayer:bottomBorder];
My full example is here, but I will provide a summary below. Layout Add a .swift and .xib file each with the same name to your project. The .xib file contains your custom view layout (using auto layout constraints preferably). Make the swift file the xib file’s owner. Code Add the following code to the … Read more
Swift 4 let view = … let point = … view.bounds.contains(point) Objective-C Use CGRectContainsPoint(): bool CGRectContainsPoint(CGRect rect, CGPoint point); Parameters rect The rectangle to examine. point The point to examine. Return Value true if the rectangle is not null or empty and the point is located within the rectangle; otherwise, false. A point is considered … Read more