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史上最全的iOS各种设备信息获取总结(iPhone 12已更新)

史上最全的iOS各种设备信息获取总结(iPhone 12已更新)

作者: 小船_d15e | 来源:发表于2020-12-28 14:42 被阅读0次

    更新至iPhone 11
    [转]
    添加了iphone12的设备

    为了统计用户信息、下发广告,服务器端往往需要手机用户设备及app的各种信息,下面讲述一下各种信息的获取方式:

    image image image image

    点击下载以上展示效果的GitHub源码

    • 一行代码就搞定的统一来!
        // 这个方法后面会列出来
        NSString *deviceName = [self getDeviceName];
        NSLog(@"设备型号-->%@", deviceName);
    
        NSString *iPhoneName = [UIDevice currentDevice].name;
        NSLog(@"iPhone名称-->%@", iPhoneName); 
    
        NSString *appVerion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
        NSLog(@"app版本号-->%@", appVerion);
    
        CGFloat batteryLevel = [[UIDevice currentDevice] batteryLevel];
        NSLog(@"电池电量-->%f", batteryLevel);
    
        NSString *localizedModel = [UIDevice currentDevice].localizedModel;
        NSLog(@"localizedModel-->%@", localizedModel);
    
        NSString *systemName = [UIDevice currentDevice].systemName;
        NSLog(@"当前系统名称-->%@", systemName);
    
        NSString *systemVersion = [UIDevice currentDevice].systemVersion;
        NSLog(@"当前系统版本号-->%@", systemVersion);
    
        struct utsname systemInfo;
        uname(&systemInfo);
        NSString *device_model = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
        NSLog(@"device_model-->%@", device_model);
    
        // 这个方法后面会单独列出
        NSString *macAddress = [self getMacAddress];
        NSLog(@"macAddress-->%@", macAddress);
    
        // 这个方法后面会单独列出
        NSString *deviceIP = [self getDeviceIPAddresses];
        NSLog(@"deviceIP-->%@", deviceIP);
    
       // 设备上次重启的时间
       NSTimeInterval time = [[NSProcessInfo processInfo] systemUptime];
       NSDate *lastRestartDate = [[NSDate alloc] initWithTimeIntervalSinceNow:(0 - time)];
    
    
    • 广告位标识符:在同一个设备上的所有App都会取到相同的值,是苹果专门给各广告提供商用来追踪用户而设的,用户可以在 设置|隐私|广告追踪里重置此id的值,或限制此id的使用,故此id有可能会取不到值,但好在Apple默认是允许追踪的,而且一般用户都不知道有这么个设置,所以基本上用来监测推广效果,是戳戳有余了
        NSString *idfa = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
        NSLog(@"广告位标识符idfa-->%@", idfa);
    
    
    • UUID是Universally Unique Identifier的缩写,中文意思是通用唯一识别码。它是让分布式系统中的所有元素,都能有唯一的辨识资讯,而不需要透过中央控制端来做辨识资讯的指 定。这样,每个人都可以建立不与其它人冲突的 UUID。在此情况下,就不需考虑数据库建立时的名称重复问题。苹果公司建议使用UUID为应用生成唯一标识字符串。
        NSString *uuid = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
        NSLog(@"唯一识别码uuid-->%@", uuid);
    
    
    • 获取设备型号
    // 获取设备型号然后手动转化为对应名称
    - (NSString *)getDeviceName
    {
        // 需要#import "sys/utsname.h"
        #warning 题主呕心沥血总结!!最全面!亲测!全网独此一份!!
        struct utsname systemInfo;
        uname(&systemInfo);
        NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
    
        if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
        if ([deviceString isEqualToString:@"iPhone3,2"])    return @"iPhone 4";
        if ([deviceString isEqualToString:@"iPhone3,3"])    return @"iPhone 4";
        if ([deviceString isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
        if ([deviceString isEqualToString:@"iPhone5,1"])    return @"iPhone 5";
        if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPhone5,3"])    return @"iPhone 5c (GSM)";
        if ([deviceString isEqualToString:@"iPhone5,4"])    return @"iPhone 5c (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPhone6,1"])    return @"iPhone 5s (GSM)";
        if ([deviceString isEqualToString:@"iPhone6,2"])    return @"iPhone 5s (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPhone7,1"])    return @"iPhone 6 Plus";
        if ([deviceString isEqualToString:@"iPhone7,2"])    return @"iPhone 6";
        if ([deviceString isEqualToString:@"iPhone8,1"])    return @"iPhone 6s";
        if ([deviceString isEqualToString:@"iPhone8,2"])    return @"iPhone 6s Plus";
        if ([deviceString isEqualToString:@"iPhone8,4"])    return @"iPhone SE";
        // 日行两款手机型号均为日本独占,可能使用索尼FeliCa支付方案而不是苹果支付
        if ([deviceString isEqualToString:@"iPhone9,1"])    return @"国行、日版、港行iPhone 7";
        if ([deviceString isEqualToString:@"iPhone9,2"])    return @"港行、国行iPhone 7 Plus";
        if ([deviceString isEqualToString:@"iPhone9,3"])    return @"美版、台版iPhone 7";
        if ([deviceString isEqualToString:@"iPhone9,4"])    return @"美版、台版iPhone 7 Plus";
        if ([deviceString isEqualToString:@"iPhone10,1"])   return @"国行(A1863)、日行(A1906)iPhone 8";
        if ([deviceString isEqualToString:@"iPhone10,4"])   return @"美版(Global/A1905)iPhone 8";
        if ([deviceString isEqualToString:@"iPhone10,2"])   return @"国行(A1864)、日行(A1898)iPhone 8 Plus";
        if ([deviceString isEqualToString:@"iPhone10,5"])   return @"美版(Global/A1897)iPhone 8 Plus";
        if ([deviceString isEqualToString:@"iPhone10,3"])   return @"国行(A1865)、日行(A1902)iPhone X";
        if ([deviceString isEqualToString:@"iPhone10,6"])   return @"美版(Global/A1901)iPhone X";
        if ([deviceString isEqualToString:@"iPhone11,2"])   return @"iPhone XS";
        if ([deviceString isEqualToString:@"iPhone11,4"])   return @"iPhone XS Max";
        if ([deviceString isEqualToString:@"iPhone11,6"])   return @"iPhone XS Max";
        if ([deviceString isEqualToString:@"iPhone11,8"])   return @"iPhone XR";
        if ([deviceString isEqualToString:@"iPhone12,1"])   return @"iPhone 11";
        if ([deviceString isEqualToString:@"iPhone12,3"])   return @"iPhone 11 Pro";
        if ([deviceString isEqualToString:@"iPhone12,5"])   return @"iPhone 11 Pro Max";
        if ([deviceString isEqualToString:@"iPhone12,8"])   return @"iPhone SE2";
        if ([deviceString isEqualToString:@"iPhone13,1"])   return @"iPhone 12 mini";
        if ([deviceString isEqualToString:@"iPhone13,2"])   return @"iPhone 12";
        if ([deviceString isEqualToString:@"iPhone13,3"])   return @"iPhone 12 Pro";
        if ([deviceString isEqualToString:@"iPhone13,4"])   return @"iPhone 12 Pro Max";
    
        if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
        if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
        if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
        if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
        if ([deviceString isEqualToString:@"iPod5,1"])      return @"iPod Touch (5 Gen)";
    
        if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
        if ([deviceString isEqualToString:@"iPad1,2"])      return @"iPad 3G";
        if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
        if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2";
        if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
        if ([deviceString isEqualToString:@"iPad2,4"])      return @"iPad 2";
        if ([deviceString isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";
        if ([deviceString isEqualToString:@"iPad2,6"])      return @"iPad Mini";
        if ([deviceString isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";
        if ([deviceString isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPad3,3"])      return @"iPad 3";
        if ([deviceString isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";
        if ([deviceString isEqualToString:@"iPad3,5"])      return @"iPad 4";
        if ([deviceString isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";
        if ([deviceString isEqualToString:@"iPad4,1"])      return @"iPad Air (WiFi)";
        if ([deviceString isEqualToString:@"iPad4,2"])      return @"iPad Air (Cellular)";
        if ([deviceString isEqualToString:@"iPad4,4"])      return @"iPad Mini 2 (WiFi)";
        if ([deviceString isEqualToString:@"iPad4,5"])      return @"iPad Mini 2 (Cellular)";
        if ([deviceString isEqualToString:@"iPad4,6"])      return @"iPad Mini 2";
        if ([deviceString isEqualToString:@"iPad4,7"])      return @"iPad Mini 3";
        if ([deviceString isEqualToString:@"iPad4,8"])      return @"iPad Mini 3";
        if ([deviceString isEqualToString:@"iPad4,9"])      return @"iPad Mini 3";
        if ([deviceString isEqualToString:@"iPad5,1"])      return @"iPad Mini 4 (WiFi)";
        if ([deviceString isEqualToString:@"iPad5,2"])      return @"iPad Mini 4 (LTE)";
        if ([deviceString isEqualToString:@"iPad5,3"])      return @"iPad Air 2";
        if ([deviceString isEqualToString:@"iPad5,4"])      return @"iPad Air 2";
        if ([deviceString isEqualToString:@"iPad6,3"])      return @"iPad Pro 9.7";
        if ([deviceString isEqualToString:@"iPad6,4"])      return @"iPad Pro 9.7";
        if ([deviceString isEqualToString:@"iPad6,7"])      return @"iPad Pro 12.9";
        if ([deviceString isEqualToString:@"iPad6,8"])      return @"iPad Pro 12.9";
        if ([deviceString isEqualToString:@"iPad6,11"])    return @"iPad 5 (WiFi)";
        if ([deviceString isEqualToString:@"iPad6,12"])    return @"iPad 5 (Cellular)";
        if ([deviceString isEqualToString:@"iPad7,1"])     return @"iPad Pro 12.9 inch 2nd gen (WiFi)";
        if ([deviceString isEqualToString:@"iPad7,2"])     return @"iPad Pro 12.9 inch 2nd gen (Cellular)";
        if ([deviceString isEqualToString:@"iPad7,3"])     return @"iPad Pro 10.5 inch (WiFi)";
        if ([deviceString isEqualToString:@"iPad7,4"])     return @"iPad Pro 10.5 inch (Cellular)";
        if ([deviceString isEqualToString:@"iPad7,5"])     return @"iPad 6th generation";
        if ([deviceString isEqualToString:@"iPad7,6"])     return @"iPad 6th generation";
        if ([deviceString isEqualToString:@"iPad8,1"])     return @"iPad Pro (11-inch)";
        if ([deviceString isEqualToString:@"iPad8,2"])     return @"iPad Pro (11-inch)";
        if ([deviceString isEqualToString:@"iPad8,3"])     return @"iPad Pro (11-inch)";
        if ([deviceString isEqualToString:@"iPad8,4"])     return @"iPad Pro (11-inch)";
        if ([deviceString isEqualToString:@"iPad8,5"])     return @"iPad Pro (12.9-inch) (3rd generation)";
        if ([deviceString isEqualToString:@"iPad8,6"])     return @"iPad Pro (12.9-inch) (3rd generation)";
        if ([deviceString isEqualToString:@"iPad8,7"])     return @"iPad Pro (12.9-inch) (3rd generation)";
        if ([deviceString isEqualToString:@"iPad8,8"])     return @"iPad Pro (12.9-inch) (3rd generation)";
    
       if ([deviceString isEqualToString:@"AppleTV2,1"])    return @"Apple TV 2";
       if ([deviceString isEqualToString:@"AppleTV3,1"])    return @"Apple TV 3";
       if ([deviceString isEqualToString:@"AppleTV3,2"])    return @"Apple TV 3";
       if ([deviceString isEqualToString:@"AppleTV5,3"])    return @"Apple TV 4";
    
        if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
        if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
    
        return deviceString;
    }
    
    
    • 获取 iPhone 设备颜色/外壳颜色
    #warning 该方法是私有API,上线会被拒
    // 由于每款手机同一颜色具体色号不一样,如 iPhone 6和 iPhone SE粉色的两个具体色值是不一样的,因此在这里只能返回一个色号
    UIDevice *device = [UIDevice currentDevice];
    SEL selector = NSSelectorFromString(@"deviceInfoForKey:");
    if (![device respondsToSelector:selector]) {
        selector = NSSelectorFromString(@"_deviceInfoForKey:");
    }
    if ([device respondsToSelector:selector]) {
        // 消除警告“performSelector may cause a leak because its selector is unknown”
        IMP imp = [device methodForSelector:selector];
        NSString * (*func)(id, SEL, NSString *) = (void *)imp;
    
        NSString *deviceColor  = func(device, selector, @"DeviceColor");
        NSString *deviceEnclosureColor  = func(device, selector, @"DeviceEnclosureColor");
        NSLog(@"deviceColor --> %@ \n @"deviceEnclosureColor --> %@ ", deviceColor, deviceEnclosureColor);
    }
    
    

    这里是一些已知的设备颜色

    • mac 地址
    - (NSString *)getMacAddress {
        int mib[6];
        size_t len;
        char *buf;
        unsigned char *ptr;
        struct if_msghdr *ifm;
        struct sockaddr_dl *sdl;
    
        mib[0] = CTL_NET;
        mib[1] = AF_ROUTE;
        mib[2] = 0;
        mib[3] = AF_LINK;
        mib[4] = NET_RT_IFLIST;
    
        if ((mib[5] = if_nametoindex("en0")) == 0) {
            printf("Error: if_nametoindex error/n");
            return NULL;
        }
    
        if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
            printf("Error: sysctl, take 1/n");
            return NULL;
        }
    
        if ((buf = malloc(len)) == NULL) {
            printf("Could not allocate memory. error!/n");
            return NULL;
        }
    
        if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
            printf("Error: sysctl, take 2");
            return NULL;
        }
    
        ifm = (struct if_msghdr *)buf;
        sdl = (struct sockaddr_dl *)(ifm + 1);
        ptr = (unsigned char *)LLADDR(sdl);
    
        NSString *outstring = [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
        free(buf);
    
        return [outstring uppercaseString];
    }
    
    
    • IP地址
    - (NSString *)getDeviceIPAddresses {
    
        int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    
        NSMutableArray *ips = [NSMutableArray array];
    
        int BUFFERSIZE = 4096;
    
        struct ifconf ifc;
    
        char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
    
        struct ifreq *ifr, ifrcopy;
    
        ifc.ifc_len = BUFFERSIZE;
        ifc.ifc_buf = buffer;
    
        if (ioctl(sockfd, SIOCGIFCONF, &ifc) >= 0){
    
            for (ptr = buffer; ptr < buffer + ifc.ifc_len; ){
    
                ifr = (struct ifreq *)ptr;
                int len = sizeof(struct sockaddr);
    
                if (ifr->ifr_addr.sa_len > len) {
                    len = ifr->ifr_addr.sa_len;
                }
    
                ptr += sizeof(ifr->ifr_name) + len;
                if (ifr->ifr_addr.sa_family != AF_INET) continue;
                if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL) *cptr = 0;
                if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) continue;
    
                memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
                ifrcopy = *ifr;
                ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
    
                if ((ifrcopy.ifr_flags & IFF_UP) == 0) continue;
    
                NSString *ip = [NSString  stringWithFormat:@"%s", inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)];
                [ips addObject:ip];
            }
        }
    
        close(sockfd);
        NSString *deviceIP = @"";
    
        for (int i=0; i < ips.count; i++) {
            if (ips.count > 0) {
                deviceIP = [NSString stringWithFormat:@"%@",ips.lastObject];
            }
        }
        return deviceIP;
    }
    
    
    • CPU
    // CPU总数目
    - (NSUInteger)getCPUCount {
        return [NSProcessInfo processInfo].activeProcessorCount;
    }
    // 已使用的CPU比例
    - (float)getCPUUsage {
        float cpu = 0;
        NSArray *cpus = [self getPerCPUUsage];
        if (cpus.count == 0) return -1;
        for (NSNumber *n in cpus) {
            cpu += n.floatValue;
        }
        return cpu;
    }
    // 获取每个cpu的使用比例
    - (NSArray *)getPerCPUUsage {
        processor_info_array_t _cpuInfo, _prevCPUInfo = nil;
        mach_msg_type_number_t _numCPUInfo, _numPrevCPUInfo = 0;
        unsigned _numCPUs;
        NSLock *_cpuUsageLock;
    
        int _mib[2U] = { CTL_HW, HW_NCPU };
        size_t _sizeOfNumCPUs = sizeof(_numCPUs);
        int _status = sysctl(_mib, 2U, &_numCPUs, &_sizeOfNumCPUs, NULL, 0U);
        if (_status)
            _numCPUs = 1;
    
        _cpuUsageLock = [[NSLock alloc] init];
    
        natural_t _numCPUsU = 0U;
        kern_return_t err = host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &_numCPUsU, &_cpuInfo, &_numCPUInfo);
        if (err == KERN_SUCCESS) {
            [_cpuUsageLock lock];
    
            NSMutableArray *cpus = [NSMutableArray new];
            for (unsigned i = 0U; i < _numCPUs; ++i) {
                Float32 _inUse, _total;
                if (_prevCPUInfo) {
                    _inUse = (
                              (_cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_USER]   - _prevCPUInfo[(CPU_STATE_MAX * i) + CPU_STATE_USER])
                              + (_cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM] - _prevCPUInfo[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM])
                              + (_cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_NICE]   - _prevCPUInfo[(CPU_STATE_MAX * i) + CPU_STATE_NICE])
                              );
                    _total = _inUse + (_cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_IDLE] - _prevCPUInfo[(CPU_STATE_MAX * i) + CPU_STATE_IDLE]);
                } else {
                    _inUse = _cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_USER] + _cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM] + _cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_NICE];
                    _total = _inUse + _cpuInfo[(CPU_STATE_MAX * i) + CPU_STATE_IDLE];
                }
                [cpus addObject:@(_inUse / _total)];
            }
    
            [_cpuUsageLock unlock];
            if (_prevCPUInfo) {
                size_t prevCpuInfoSize = sizeof(integer_t) * _numPrevCPUInfo;
                vm_deallocate(mach_task_self(), (vm_address_t)_prevCPUInfo, prevCpuInfoSize);
            }
            return cpus;
        } else {
            return nil;
        }
    }
    
    
    • Disk磁盘空间
    // 获取磁盘总空间
    - (int64_t)getTotalDiskSpace {
        NSError *error = nil;
        NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
        if (error) return -1;
        int64_t space =  [[attrs objectForKey:NSFileSystemSize] longLongValue];
        if (space < 0) space = -1;
        return space;
    }
    // 获取未使用的磁盘空间
    - (int64_t)getFreeDiskSpace {
        NSError *error = nil;
        NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
        if (error) return -1;
        int64_t space =  [[attrs objectForKey:NSFileSystemFreeSize] longLongValue];
        if (space < 0) space = -1;
        return space;
    }
    // 获取已使用的磁盘空间
    - (int64_t)getUsedDiskSpace {
        int64_t totalDisk = [self getTotalDiskSpace];
        int64_t freeDisk = [self getFreeDiskSpace];
        if (totalDisk < 0 || freeDisk < 0) return -1;
        int64_t usedDisk = totalDisk - freeDisk;
        if (usedDisk < 0) usedDisk = -1;
        return usedDisk;
    }
    
    
    • Memory内存相关数据
    // 系统总内存空间
    - (int64_t)getTotalMemory {
        int64_t totalMemory = [[NSProcessInfo processInfo] physicalMemory];
        if (totalMemory < -1) totalMemory = -1;
        return totalMemory;
    }
    
    // 活跃的内存,正在使用或者很短时间内被使用过
    - (int64_t)getActiveMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return vm_stat.active_count * page_size;
    }
    
    // 最近使用过,但是目前处于不活跃状态的内存
    - (int64_t)getInActiveMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return vm_stat.inactive_count * page_size;
    }
    
    // 空闲的内存空间
    - (int64_t)getFreeMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return vm_stat.free_count * page_size;
    }
    
    // 已使用的内存空间
    - (int64_t)getUsedMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return page_size * (vm_stat.active_count + vm_stat.inactive_count + vm_stat.wire_count);
    }
    
    // 用来存放内核和数据结构的内存,framework、用户级别的应用无法分配
    - (int64_t)getWiredMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return vm_stat.wire_count * page_size;
    }
    
    // 可释放的内存空间:内存吃紧自动释放,针对大对象存放所需的大块内存空间
    - (int64_t)getPurgableMemory {
        mach_port_t host_port = mach_host_self();
        mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
        vm_size_t page_size;
        vm_statistics_data_t vm_stat;
        kern_return_t kern;
    
        kern = host_page_size(host_port, &page_size);
        if (kern != KERN_SUCCESS) return -1;
        kern = host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size);
        if (kern != KERN_SUCCESS) return -1;
        return vm_stat.purgeable_count * page_size;
    }
    
    

    再放一下GitHub源码

    作者:si1ence
    链接:https://www.jianshu.com/p/b23016bb97af
    来源:简书
    著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。

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