iOS各种设备信息获取总结

发表于 | 分类于 |
字数统计: 3.1k | 阅读时长 ≈ 17

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：

直接上代码:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
// 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。

1
2
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。

1
2
NSString *uuid = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
NSLog(@"唯一识别码uuid-->%@", uuid);

获取设备型号

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
// 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:@"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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
#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);
}

mac 地址

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
- (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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
- (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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
// 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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
// 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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
// 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;
}

作者：si1ence
链接：https://www.jianshu.com/p/b23016bb97af
來源：简书