检查互联网连接的最简单方法是什么?
我找到了此代码示例,但这是Xcode11 / Swift5中最有效的方法吗?
在调用从互联网下载的函数之前,我只需要在按下按钮的情况下检查连接即可。因此,在调用我的函数之前进行一次简单检查即可。持续监控是最有效的吗?还是我应该在按钮下直接使用一些东西。
import Network
class ViewController: UIViewController {
let monitor = NWPathMonitor()
let queue = DispatchQueue(label: "InternetConnectionMonitor")
override func viewDidLoad() {
monitor.pathUpdateHandler = { pathUpdateHandler in
if pathUpdateHandler.status == .satisfied {
print("Internet connection is on.")
} else {
print("There's no internet connection.")
}
}
monitor.start(queue: queue)
}
}
答案 0 :(得分:2)
我为此使用了ashleymills的Reachability框架: https://github.com/ashleymills/Reachability.swift
您只需要通过以下方式导入:
import ReachabilitySwift
然后在您的视图控制器内部,您可以执行以下操作:
let reachability = try! Reachability()
if reachability.isReachable {
print("Internet connection is on.")
}
有关如何使用闭包的更多示例,请参见回购的自述文件。 请注意,这是一个外部框架,并且可能不是最新的Swift版本的最新版本。
答案 1 :(得分:0)
导入SystemConfiguration:
import SystemConfiguration
在viewController类之前添加此类:
public class Reachability {
class func isConnected() -> Bool {
var noAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
noAddress.sin_len = UInt8(MemoryLayout.size(ofValue: noAddress))
noAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &noAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {noSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, noSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
}
现在在viewDidLoad中检查连接:
if Reachability.isConnected(){
print("Internet Connection is ON")
} else {
print("Internet Connection OFF")
}