In Swift 5
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = .center
textView.attributedText = NSAttributedString(string: "String",
attributes: [.paragraphStyle: paragraph])
In Swift-4
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = .center
let attributes: [NSAttributedString.Key : Any] = [NSAttributedString.Key.paragraphStyle: paragraph]
let attrString = NSAttributedString(string:"string", attributes: attributes)
textView.attributedText = attrString
In Swift-3
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = .center
let attributes: [String : Any] = [NSParagraphStyleAttributeName: paragraph]
let attrString = NSAttributedString(string:"string", attributes: attributes)
textView.attributedText = attrString
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…