Drawing text over Core Graphics in Swift 3

Question

Background: I am drawing on a UIImageView with Core Graphics. I would like to ultimately draw a text string over the core graphics drawing.

This (hackingwithswift.com) m

Answer 1

Swift 3.0 : to draw text

   func drawMyText(myText:String,textColor:UIColor, FontName:String, FontSize:CGFloat, inRect:CGRect){

     let textFont = UIFont(name: FontName, size: FontSize)!
    let textFontAttributes = [
        NSFontAttributeName: textFont,
        NSForegroundColorAttributeName: textColor,
        ] as [String : Any]

    myText.draw(in: inRect, withAttributes: textFontAttributes)
}

call this function , below is e.g.

let _rect = CGRect(x: 40, y: 100, width: 40, height: 40)

 drawMyText(myText: "Hello", textColor: UIColor.black, FontName: "Helvetica Bold", FontSize: 11 , inRect:_rect)

Answer 2

Using Swift 4:

let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center

let attributes = [
    NSAttributedStringKey.paragraphStyle: paragraphStyle,
    NSAttributedStringKey.font: UIFont.systemFont(ofSize: 12.0),
    NSAttributedStringKey.foregroundColor: UIColor.blue
]

let myText = "HELLO"
let attributedString = NSAttributedString(string: myText, attributes: attributes)

let stringRect = CGRect(x: W/2 - 50, y: border, width: 100, height: H)
attributedString.draw(in: stringRect)

For Swift 4.2, change the above attributes to:

let attributes: [NSAttributedString.Key : Any] = [
    .paragraphStyle: paragraphStyle,
    .font: UIFont.systemFont(ofSize: 12.0),
    .foregroundColor: UIColor.blue
]