Swift 枚举

代码如下

enum ConnectServerStatus {
    case success(String)
    case error(Int)
    case waiting
    case lostConnect
}

func connect(status:Int?) -> ConnectServerStatus {
    if let status = status {
        switch status {
        case 0:
            return .success("connect server success")
        case -1:
            return .error(-1)
        default:
            return .waiting
        }

    }else {
        print("lostConnect")
        return .lostConnect
    }
}

var status:ConnectServerStatus = connect(nil)
switch status {
case .success:
    print("success")
case .error:
    print("error code is (status)")
default:
    print("waiting")
}

（编辑：李大同）

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