Swift --- rawValue
2019-07-08 本文已影响0人
BabyNeedCare
举个例子：
enum Rank: Int {
case ace = 1
case two, three, four, five, six, seven, eight, nine, ten
case jack, queen, king
func simpleDescription() -> String {
switch self {
case .ace:
return "ace"
case .jack:
return "jack"
case .queen:
return "queen"
case .king:
return "king"
default:
return String(self.rawValue)
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
let ace = Rank.ace
let aceRawValue = ace.rawValue
if aceRawValue == 1 {
print("Yes")
}
}
init?(rawValue:)
override func viewDidLoad() {
super.viewDidLoad()
if let convert = Rank(rawValue: 5){
print("\(convert.simpleDescription())")
}
}
控制台打印：5
