ios - 找不到接受提供的参数的 '!=' 的重载？

Question

刚开始使用 swift 尝试编写一些代码来检测是否存在互联网连接。我得到 Could not find an overload for '!=' that accepts the provided arguments on the last line.我做错了什么？

class func hasConnectivity() -> Bool {
  let reachability: Reachability = Reachability.reachabilityForInternetConnection()
  let networkStatus: NetworkStatus = reachability.currentReachabilityStatus()
  return networkStatus != NotReachable
}

Answer 1

返回您要查找的结果的一种方法是打开 networkStatus:

switch networkStatus {
case .NotReachable:
    return false
default:
    return true
}