失败的案例基于iPhone 4S和IOS版本5.0.1.
大家好,
你知道哪种情况(除了低内存)它会失败吗?任何想法或讨论将不胜感激.谢谢.
/* Original source code courtesy John from iOSDeveloperTips.com */#include <sys/socket.h>#include <sys/sysctl.h>#include <net/if.h>#include <net/if_dl.h>- (Nsstring *)getMacAddress{ int mgmtInfoBase[6]; char *msgBuffer = NulL; Nsstring *errorFlag = NulL; size_t length; // Setup the management information Base (mib) mgmtInfoBase[0] = CTL_NET; // Request network subsystem mgmtInfoBase[1] = AF_ROUTE; // Routing table info mgmtInfoBase[2] = 0; mgmtInfoBase[3] = AF_link; // Request link layer information mgmtInfoBase[4] = NET_RT_IFList; // Request all configured interfaces // With all configured interfaces requested,get handle index if ((mgmtInfoBase[5] = if_nametoindex("en0")) == 0) errorFlag = @"if_nametoindex failure"; // Get the size of the data available (store in len) else if (sysctl(mgmtInfoBase,6,NulL,&length,0) < 0) errorFlag = @"sysctl mgmtInfoBase failure"; // Alloc memory based on above call else if ((msgBuffer = malloc(length)) == NulL) errorFlag = @"buffer allocation failure"; // Get system information,store in buffer else if (sysctl(mgmtInfoBase,msgBuffer,0) < 0) { free(msgBuffer); errorFlag = @"sysctl msgBuffer failure"; } else { // Map msgbuffer to interface message structure struct if_msghdr *interfaceMsgStruct = (struct if_msghdr *) msgBuffer; // Map to link-level socket structure struct sockaddr_dl *socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1); // copy link layer address data in socket structure to an array unsigned char macAddress[6]; memcpy(&macAddress,socketStruct->sdl_data + socketStruct->sdl_nlen,6); // Read from char array into a string object,into Traditional Mac address format Nsstring *macAddressstring = [Nsstring stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",macAddress[0],macAddress[1],macAddress[2],macAddress[3],macAddress[4],macAddress[5]]; NSLog(@"Mac Address: %@",macAddressstring); // Release the buffer memory free(msgBuffer); return macAddressstring; } // Error... NSLog(@"Error: %@",errorFlag); return errorFlag;}
任何帮助是极大的赞赏.
解决方法 在将iPhone升级到iOS 5之后,我遇到了这样的情况,问题是臭名昭着的wifi漏洞.您不会喜欢这个答案,但唯一的解决方案是将设备带回Apple并获得一个正常工作的新设备.当mac地址查找失败时,代码可以更改为不崩溃,但这在REST调用需要唯一标识符时无效.作为一名开发人员,你被困在一块岩石和一块坚硬的地方之间. 总结以上是内存溢出为你收集整理的iPhone哪些案例无法获得mac地址成功?全部内容,希望文章能够帮你解决iPhone哪些案例无法获得mac地址成功?所遇到的程序开发问题。
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