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
手机充电
设备操作系统版本
当前应用版本
可用内存
可用存储空间

Answer 1

我认为所有这些信息都是合法的。以下是每个代码的一些代码

留出电池：

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

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;
    }

操作系统版本

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

应用版

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

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会告诉你的一样，受到https://sites.google.com/site/iphonedevnote/Home/get-available-memory的启发）

//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);

磁盘空间（来自https://stackoverflow.com/a/8036586/3276557上的Code Warrior的代码源）

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]);
}

Answer 2

您正在寻找UIDevice类。一些代码sni

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

获取操作系统版本，电池，存储，内存等系统信息

2 个答案: