swift 实践- 03 -- UILabel

class ViewController: UIViewController {

override func viewDidLoad() {

super.viewDidLoad()

// 标签

let label: UILabel = UILabel(frame: CGRect(x: 100, y: 250, width: 200, height: 100))

label.text = "Hello world!"

self.view.addSubview(label)

label.textAlignment = .center

// 设置文本高亮

label.isHighlighted = true

// 设置文本高亮颜色

label.highlightedTextColor = UIColor.black

// 富文本设置

let attributeString = NSMutableAttributedString(string:"welcome to china")

// 改变指定位置的字符串的文字 font

attributeString.addAttribute(NSFontAttributeName,

value: UIFont.systemFont(ofSize: 20),

range: NSMakeRange(0, 4))

// 设置指定位置的字体颜色

attributeString.addAttribute(NSForegroundColorAttributeName, value: UIColor.blue,

range: NSMakeRange(0, 3))

// 设置指定位置的文字背景颜色

attributeString.addAttribute(NSBackgroundColorAttributeName, value: UIColor.green,

range: NSMakeRange(3,3))

label.attributedText = attributeString

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}