iPhone判斷當前網路連接狀態，iphone當前網路連接

iPhone判斷當前網路連接狀態，iphone當前網路連接

匯入標頭檔

#include <netinet/in.h>#import <SystemConfiguration/SCNetworkReachability.h>

判斷網路連接狀態

//判斷當前網路連接狀態-(BOOL)isNetworkAvailable{    //建立零地址，0.0.0.0的地址表示查詢原生網路連接狀態    struct sockaddr_in zeroAddress;    bzero(&zeroAddress, sizeof(zeroAddress));    zeroAddress.sin_len = sizeof(zeroAddress);    zeroAddress.sin_family = AF_INET;        // Recover reachability flags    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);    SCNetworkReachabilityFlags flags;        //獲得串連的標誌    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);    CFRelease(defaultRouteReachability);        //如果不能擷取串連標誌，則不能串連網路，直接返回    if (!didRetrieveFlags)    {        return NO;    }        //根據獲得的串連標誌進行判斷    BOOL isReachable = flags & kSCNetworkFlagsReachable;    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;    return (isReachable && !needsConnection) ? YES : NO;    }