Swift初始化語(yǔ)法糖庫(kù)Then，使初始化代碼更簡(jiǎn)潔。

使用Then初始化UILabel并設(shè)置其屬性：

let label = UILabel().then {
  $0.textAlignment = .center
  $0.textColor = .black
  $0.text = "Hello, World!"
}

let label: UILabel = {
  let label = UILabel()
  label.textAlignment = .center
  label.textColor = .black
  label.text = "Hello, World!"
  return label
}()