获取操作系统版本,电池,存储,内存等系统信息

Question

我正在开发一个需要显示一些设备信息的应用程序,有人可以帮我验证是否合法提取这些信息,可能一些代码片段会非常有用.

提前致谢 !

设备信息:

• 保持电池状态
• 电话充电
• 设备OS版本
• 当前应用版本
• 有效内存
• 可用存储

Answer 1

我认为所有这些信息都是合法的.这里有一些代码

1. 保持电量:

   UIDevice *device = [UIDevice currentDevice];
   [device setBatteryMonitoringEnabled:YES];
   float remainBatteryLife = [myDevice batteryLevel];
   

2. 手机充电状态

   //same device object as the previous one
   UIDevice *device = [UIDevice currentDevice];
   [device setBatteryMonitoringEnabled:YES];
   int i=[myDevice batteryState];
   
   switch (i)
   {
       case UIDeviceBatteryStateUnplugged:
           //Unplugged
           break;
       case UIDeviceBatteryStateCharging:
           //Charging
           break;
       case UIDeviceBatteryStateFull:
           //full        
           break;
       default:
           break;
       }
   

3. 操作系统版本

   NSString *OSVersion = [[UIDevice currentDevice] systemVersion];
   

4. 应用版本

   NSString *majorVersion = [infoDictionary objectForKey:@"CFBundleShortVersionString"];
   NSString *minorVersion = [infoDictionary objectForKey:@"CFBundleVersion"];
   

5. 可用内存(对于这个问题,我使用了一些C代码而不是Objective-C,但它的回归与itunes告诉你的完全相同,受https://sites.google.com/site/iphonedevnote/Home/get-available-的启发记忆)

   //import some C libraries first
   #import <mach/mach.h>
   #import <mach/mach_host.h>
   
   //then put these code in whichever method it needs to be
   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;
   natural_t memoryFactor = 1024;
   NSLog(@"used: %u MB free: %u MB total: %u MB", (mem_used / memoryFactor) / memoryFactor, (mem_free / memoryFactor) /memoryFactor, (mem_total /memoryFactor) /memoryFactor);
   

6. 磁盘空间(来自Code Warrior的代码源,位于/sf/answers/562561051/)

   uint64_t totalSpace = 0;
   uint64_t totalFreeSpace = 0;
   NSError *error = nil;
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
   NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
   
   if (dictionary) {
       NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];
       NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
       totalSpace = [fileSystemSizeInBytes unsignedLongLongValue];
       totalFreeSpace = [freeFileSystemSizeInBytes unsignedLongLongValue];
       NSLog(@"Memory Capacity of %llu MiB with %llu MiB Free memory available.", ((totalSpace/1024ll)/1024ll), ((totalFreeSpace/1024ll)/1024ll));
   } else {
       NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
   }