Different position for different elements

Question

Balvir-255 OP

Created Apr ’23

Replies 2

Boosts 0

Participants 2

Hello guys!

In SwiftUI is there a function to show different objects in random order or can I just do this by assigning the coordinates to each individual element?

For example, suppose I have a lot of circles, and I want to position them randomly, how can I do it?

Thanks in advance.

Boost

Answer 1

Claude31 OP

Apr ’23

It depends on your design.

if you have predefined positions in an array (posArray: [CGPoint]) of items and want to show objects using one of this random positions

Then you can randomise the array of objects (objectsArray) in a computed var randomObjects And draw them using the posArray to get their position

Or you may have a struct for object, including a position

 struct MyCircle {
    var radius: Int
    var pos: CGPoint {
        let x = (0...500).randomElement()!
        let y = (0...800).randomElement()!
        return CGPoint(x: x, y: y)
    }
}

Then you create the array of MyCircle and draw them

Note: if you want to redraw at random position, create a draw func that draws the circle

 struct MyObject {
    var radius: Int
    var color: UIColor = .clear
    var pos: CGPoint {
        let x = (0...500).randomElement()!
        let y = (0...800).randomElement()!
        return CGPoint(x: x, y: y)
    }
    
    func draw() {
        print("pos", pos)
        &#x2F;&#x2F; draw at pos with radius, filled with color
    }
}

Each time you call draw(), a new random position will be computed.

0

Answer 2

Balvir-255 OP

Apr ’23

Thanks @Claude31 I tried this way but it gives an error

 struct ContentView: View {
    var body: some View {
        MyCircle(radius: 3) &#x2F;&#x2F; Static method &#039;buidBlock&#039; requires that &#039;MyCircle&#039; conform to &#039;View&#039;
    }
}
 
struct MyCircle {
    var radius: Int
    var pos: CGPoint {
        let x = (0...500).randomElement()!
        let y = (0...500).randomElement()!
        return CGPoint(x: x, y: y)
    }
}

What did I do wrong?

0

	struct MyCircle {
	var radius: Int
	var pos: CGPoint {
	let x = (0...500).randomElement()!
	let y = (0...800).randomElement()!
	return CGPoint(x: x, y: y)
	}
	}

	struct MyObject {
	var radius: Int
	var color: UIColor = .clear
	var pos: CGPoint {
	let x = (0...500).randomElement()!
	let y = (0...800).randomElement()!
	return CGPoint(x: x, y: y)
	}

	func draw() {
	print("pos", pos)
	// draw at pos with radius, filled with color
	}
	}

	struct ContentView: View {
	var body: some View {
	MyCircle(radius: 3) // Static method 'buidBlock' requires that 'MyCircle' conform to 'View'
	}
	}

	struct MyCircle {
	var radius: Int
	var pos: CGPoint {
	let x = (0...500).randomElement()!
	let y = (0...500).randomElement()!
	return CGPoint(x: x, y: y)
	}
	}