Cannot call * with a list of arguments of type ($ T12, @lvalue CGFloat)

Question

The header is the error message I get to compile this line:

let width : Float = mainView.frame.size.width / 100.0 * value 

The variable value is of type Float . What is wrong here?

Answer 1

cannot call * using an argument list of type ($ T12, @lvalue CGFloat)

Read the answer by mistake:

mainView.frame.size.width is of type CGFloat , so you need to add CGFloat to Float

Try setting value as CGFloat or pour Float(image.size.width)

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In the playground

Option 1

 let image = UIImage(named:"group_1.png") // just for example let value:CGFloat = 10.0 let width:Float = Float(image.size.width / 100.0 * value) 

Option 2

 let value:Float = 10.0 let width:Float = Float(image.size.width) / 100.0 * value