我在应用程序中使用“可达性”类多次检查了互联网连接,

我想使用DI。

我该怎么办?

可达性等级:

public class Reachability {
class func isConnectedToNetwork() -> Bool {
    var zeroAddress = sockaddr_in()
    zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
    zeroAddress.sin_family = sa_family_t(AF_INET)
    let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
        SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
    }
    var flags = SCNetworkReachabilityFlags()
    if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
        return false
    }
    let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
    let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
    return (isReachable && !needsConnection)
}

最佳答案

如果您不能在依赖实现之间切换,则依赖注入(DI)有点意义,因此我们将为依赖引入一个协议。通过对您的班级进行一些更改,我可以看到如下所示的DI模式。

protocol Reachability {
    var connectedToNetwork: Bool { get }
}

class DefaultReachability: Reachability {

    var connectedToNetwork: Bool {
        // ...
    }

}

// Example of a dependend class
class Some {

    let reachability: Reachability

    init(reachability: Reachability) {
        self.reachability = reachability // Now it is dependency
    }

    func action() {
        if reachability.connectedToNetwork {
            // ...
        } else {
            // ...
        }
    }

}

关于swift - 使用具有可达性(互联网检查)类的依赖注入(inject)?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/34379644/

10-16 09:56