New Swift object

Using Swift
1

I have been writing code for apps that provide visual representations of conditions. Imagine a bouncing ball. To do do this, I have been using the Color Well object because it allows me to control size, location, and color. However, even without a border, a slight outline is present. And, the shape is always a square.

Is there a third-party extension to Swift that includes an object with controllable size, location, and color?

I'm using Xcode 8.3.3. I think that that corresponds to Swift 3.

Thanks.

2

You are on Cocoa? If so, the solution is quite simple.

Color

class ControllableView: NSView {
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        // For a red color
        let path = NSBezierPath(rect: bounds)
        NSColor.red.setFill()
        path.fill()
    }
}

In your storyboard, change the view type to ControllableView.

Movement/Size
In NSViewController, you can simply use the .frame settable property to move around and resize your view.

3

Sorry about putting this in another post (I should have read your question more clearly):

You can use various methods on NSBezierPath to change shapes. This class allows you to draw lines, circles, etc. See NSBezierPath | Apple Developer Documentation.

4

Yes, Cocoa. The information you provided is better than I expected. Thanks!

5

I spoke too soon. How can I change the object's color dynamically?

7 
class ControllableView: NSView {
   var redIndex = CGFloat(0.0/255.0)
   var greenIndex = CGFloat(0.0/255.0)
   var blueIndex = CGFloat(0.0/255.0)

   override func draw(_ dirtyRect: NSRect) {
       super.draw(dirtyRect)
    
       let path = NSBezierPath(ovalIn: bounds)
       NSColor(red: redIndex, green: greenIndex, blue: blueIndex, alpha: 1).setFill()
       path.fill()
   }
}
8

That works as long as you pair every change to the color with a call to setNeedsDisplay.