开发中常用方法

1. 获取设备的UUID

+ (NSString*)getDeviceUUID{
    int                 mgmtInfoBase[6];
    char                *msgBuffer = NULL;
    size_t              length;
    unsigned char       macAddress[6];
    struct if_msghdr    *interfaceMsgStruct;
    struct sockaddr_dl  *socketStruct;
    NSString * errorFlag = NULL;
    
    // 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";
    else
    {
        // Get the size of the data available (store in len)
        if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0)
            errorFlag = @"sysctl mgmtInfoBase failure";
        else
        {
            // Alloc memory based on above call
            if ((msgBuffer = malloc(length)) == NULL)
                errorFlag = @"buffer allocation failure";
            else
            {
                // Get system information, store in buffer
                if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0)
                    errorFlag = @"sysctl msgBuffer failure";
            }
        }
    }
    
    // Befor going any further...
    if (errorFlag != NULL)
    {
        //DebugLog(@"Error: %@", errorFlag);
        return errorFlag;
    }
    
    // Map msgbuffer to interface message structure
    interfaceMsgStruct = (struct if_msghdr *) msgBuffer;
    
    // Map to link-level socket structure
    socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1);
    
    // Copy link layer address data in socket structure to an array
    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]];
    //    DebugLog(@"Mac Address: %@", macAddressString);
    
    // Release the buffer memory
    free(msgBuffer);
    
    //适配iOS7设备绑定功能
    if ([[[UIDevice currentDevice] systemVersion]intValue]<6) {
        return macAddressString;
    }
    else{
        //        return [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
        NSString *adUUIDString = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
        //NSLog(@"adUUIDString: %@",adUUIDString);
        
        return [adUUIDString stringByReplacingOccurrencesOfString:@"-" withString:@""];
        
    }
}

说明: 需要导入下面的头文件

#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

当程序卸载重新安装之后获取到的UUID会发生变化,可是在开发中我们需要的是不能变化的，那该怎么办呢？？？
别急，已经为你准备好了，请看下面的链接.

链接: http://pan.baidu.com/s/1miwBGUG 密码: nbys

2. 过滤emoji字符

/**
 *  过滤emoji字符
 *
 *  @param string 需要过滤的字符串
 *
 *  @return 过滤emoji后的字符串
 */
+ (NSString *)filterEmoji:(NSString *)string {
    NSUInteger len = [string lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
    const char *utf8 = [string UTF8String];
    char *newUTF8 = malloc( sizeof(char) * len );
    int j = 0;
    
    //0xF0(4) 0xE2(3) 0xE3(3) 0xC2(2) 0x30---0x39(4)
    for ( int i = 0; i < len; i++ ) {
        unsigned int c = utf8[i];
        BOOL isControlChar = NO;
        if ( c == 4294967280 ||
            c == 4294967089 ||
            c == 4294967090 ||
            c == 4294967091 ||
            c == 4294967092 ||
            c == 4294967093 ||
            c == 4294967094 ||
            c == 4294967095 ||
            c == 4294967096 ||
            c == 4294967097 ||
            c == 4294967088 ) {
            i = i + 3;
            isControlChar = YES;
        }
        if ( c == 4294967266 || c == 4294967267 ) {
            i = i + 2;
            isControlChar = YES;
        }
        if ( c == 4294967234 ) {
            i = i + 1;
            isControlChar = YES;
        }
        if ( !isControlChar ) {
            newUTF8[j] = utf8[i];
            j++;
        }
    }
    newUTF8[j] = '\0';
    NSString *encrypted = [NSString stringWithCString:(const char*)newUTF8 encoding:NSUTF8StringEncoding];
    free( newUTF8 );
    return encrypted;
}