iOS开发中判断网络连接的操作步骤如下:
1、添加framework,SystemConfiguration.framework;
2、倒入文件:
#import <SystemConfiguration/SystemConfiguration.h> #include <netdb.h>
3、判断方法:
- (BOOL) connectedToNetwork { // Create zero addy 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; BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags); CFRelease(defaultRouteReachability); if (!didRetrieveFlags) { return NO; } BOOL isReachable = ((flags & kSCNetworkFlagsReachable) != 0); BOOL needsConnection = ((flags & kSCNetworkFlagsConnectionRequired) != 0); return (isReachable && !needsConnection) ? YES : NO; }
来自《The iPhone Developer's Cookbook》