iOS App

iOS App For Myself.

App Info

Device信息

硬件设备类型

硬件类型字符串，格式为”iPhone5,1”、”iPod5,1”、”iPad3,2”、”x86_64”等

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-(NSString *)platform
{
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);
    NSString *platform = [NSString stringWithUTF8String:machine];
    free(machine);
    return platform;
}

或者

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-(NSString *)platform{
    struct utsname systemInfo;
    uname(&systemInfo);
    NSString *machine =  [NSString stringWithCString:systemInfo.machine
                                            encoding:NSUTF8StringEncoding];
    return machine;
}

硬件类型和具体设备的对应关系见iOSDeviceModelMapping.plist。

MAC地址

自iOS7后， 获取Mac地址总会返回”02:00:00:00:00:00”。

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- (NSString *) macaddress{

    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");
        free(buf);
        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;
}

操作系统名

如”iPhone OS”

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[[UIDevice currentDevice] systemName];

操作系统版本号

例如：7.1.1

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[[UIDevice currentDevice] systemVersion];

Model

例如”iPhone”,“iPod touch”,“iPhone Simulator”

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[[UIDevice currentDevice] model];

IDFV(Vendor ID)

厂商ID,具体见UDID

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[[[UIDevice currentDevice] identifierForVendor] UUIDString];

设备方向(orientation)

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UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];

注:UIDeviceOrientation与UIInterfaceOrientation定义有差别。

物理内存

获取设备物理内存大小,以字节为单位

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#include <sys/sysctl.h>

- (uint64_t)physicalMemory
{
    size_t size = sizeof(uint64_t);
    uint64_t physicalMemorySize;
    int mib[2] = {CTL_HW, HW_MEMSIZE};
    sysctl(mib, 2, &physicalMemorySize, &size, NULL, 0);
    return physicalMemorySize;
}

用户空间内存大小

获取用户空间可用的内存大小(去除内核、Video等内存占用)，以字节为单位

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#include <sys/sysctl.h>
- (uint64_t)userMemory
{
    size_t size = sizeof(uint64_t);
    uint64_t userMemorySize;
    int mib[2] = {CTL_HW, HW_USERMEM};
    sysctl(mib, 2, &userMemorySize, &size, NULL, 0);
    return userMemorySize;
}

当前应用所占内存

目前没有很好的方法获取App当前所占内存,有一种方法是使用vm_statistics_data_t获取虚拟内存信息，仅供参考 Determining Available Memory

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#import <mach/mach.h>
#import <mach/mach_host.h>

static void print_free_memory () {
    mach_port_t host_port;
    mach_msg_type_number_t host_size;
    vm_size_t pagesize;

    host_port = mach_host_self();
    host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
    host_page_size(host_port, &pagesize);

    vm_statistics_data_t vm_stat;

    if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) != KERN_SUCCESS)
        NSLog(@"Failed to fetch vm statistics");

    /* Stats in bytes */
    natural_t mem_used = (vm_stat.active_count +
                          vm_stat.inactive_count +
                          vm_stat.wire_count) * pagesize;
    natural_t mem_free = vm_stat.free_count * pagesize;
    natural_t mem_total = mem_used + mem_free;
    NSLog(@"used: %u free: %u total: %u", mem_used, mem_free, mem_total);
}

iOSMemoryBudgetTest通过不断alloc内存来记录应用crash时总的内存分配量， 但记录的alloc的内存数量和使用上面方法获取的mem_used数据对不上。

进程信息(NSProcessInfo)

NSProcessInfo中包含当前进程的信息,包括启动参数、环境变量、进程ID、进程名、操作系统名、操作系统版本、处理器个数、系统启动时间等。

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NSProcessInfo *processInfo = [NSProcessInfo processInfo];
NSDictionary *environment = [processInfo environment];
NSArray *arguments = [processInfo arguments];
NSUInteger numcore = [processInfo processorCount];

示例代码见SystemInfo。

Application信息

当前应用状态(UIApplicationState)

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 [[UIApplication sharedApplication] applicationState];

UIApplicationState状态有:

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typedef enum : NSInteger {
   UIApplicationStateActive,
   UIApplicationStateInactive,
   UIApplicationStateBackground
} UIApplicationState;

应用注册的推送类型(UIRemoteNotificationType)

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[[UIApplication sharedApplication] enabledRemoteNotificationTypes];

UIRemoteNotificationType定义的类型有

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typedef enum : NSUInteger {
   UIRemoteNotificationTypeNone    = 0,
   UIRemoteNotificationTypeBadge   = 1 << 0,
   UIRemoteNotificationTypeSound   = 1 << 1,
   UIRemoteNotificationTypeAlert   = 1 << 2,
   UIRemoteNotificationTypeNewsstandContentAvailability = 1 << 3
} UIRemoteNotificationType;

Screen信息

分辨率scale

1.0为普通分辨率，2.0为2倍分辨率，即为Retina屏幕

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[[UIScreen mainScreen] scale];

Bundle信息

发布版本号(Version/ Bundle versions string, short)

一般格式为三段.分隔的整数，如3.24.1等

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[[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];

使用NSString的compare方法，指定NSNumbericSearch选项，可比较版本号

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-(BOOL)version:(NSString*)_oldver lessthan:(NSString*)_newver
{
    if([_oldver compare:_newver options:NSNumericSearch] == NSOrderedAscending){
        return YES;
    }
    return NO;
}

内部版本号(build/Bundle version)

内部构建版本号，格式也一般为三段.分隔的整数，也可以使用单一整数递增

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[[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleVersionKey];

kCFBundleVersionKey定义即为字符串”CFBundleVersion”

Bundle identifier

每个应用的唯一bundle id

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[[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleIdentifierKey];

kCFBundleIdentifierKey定义为”CFBundleIdentifier”

其他

广告ID(IDFA)

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[[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];

参考