ios - iOS中单点的互联网连接方法？

Question

我的应用程序中有这个方法来检查互联网。

/*
 Connectivity testing code pulled from Apple's Reachability Example: http://developer.apple.com/library/ios/#samplecode/Reachability
 */
-(BOOL)hasConnectivity {
    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;

    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr*)&zeroAddress);
    if(reachability != NULL) {
        //NetworkStatus retVal = NotReachable;
        SCNetworkReachabilityFlags flags;
        if (SCNetworkReachabilityGetFlags(reachability, &flags)) {
            if ((flags & kSCNetworkReachabilityFlagsReachable) == 0)
            {
                // if target host is not reachable
                return NO;
            }

            if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)
            {
                // if target host is reachable and no connection is required
                //  then we'll assume (for now) that your on Wi-Fi
                return YES;
            }


            if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||
                 (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))
            {
                // ... and the connection is on-demand (or on-traffic) if the
                //     calling application is using the CFSocketStream or higher APIs

                if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0)
                {
                    // ... and no [user] intervention is needed
                    return YES;
                }
            }

            if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
            {
                // ... but WWAN connections are OK if the calling application
                //     is using the CFNetwork (CFSocketStream?) APIs.
                return YES;
            }
        }
    }

    return NO;
}

我必须将这个方法粘贴到每个类上并像这样检查互联网

if([self hasConnectivity] == YES){

我想把这个方法放在一个类中，就像我把宏放在 Constants.h 或 .pch 文件中一样。

有什么办法(除了委托(delegate)，因为我不想那么多地使用委托(delegate))。

谢谢

Answer 1

将 -(BOOL)hasConnectivity 更改为 +(BOOL)hasConnectivity(这会将一个实例方法转换为一个类 方法)。将其添加到名为 Reachability 的类中。将 Reachability.h 添加到您的 .pch 中。现在调用 [Reachability hasConnectivity] 并从您应用的任何位置检查其返回值。繁荣。