iOS中通过UIDevice获取设备的部分信息

通过[UIDevice currentDevice] 可以获取到当前设备对象，通过KVC获取设备的属性信息，主要属性有：

name//设备名称

model//模型

localizedModel//本地化模型

systemName//系统名称

systemVersion//系统版本

orientation //设备方向

batteryMonitoringEnabled//电池监听是否可用

batteryState//电池状态

batteryLevel//电池电量

proximityMonitoringEnabled//距离感应器监听是否可用

proximityState//距离感应器状态

multitaskingSupported//是否支持多任务

NSString * name = [[UIDevice currentDevice] valueForKey:@"name"];
    NSString * model = [[UIDevice currentDevice] valueForKey:@"model"];
    NSString * localizedModel = [[UIDevice currentDevice] valueForKey:@"localizedModel"];
    NSString * systemName = [[UIDevice currentDevice] valueForKey:@"systemName"];
    NSString * systemVersion = [[UIDevice currentDevice] valueForKey:@"systemVersion"];

    UIDeviceOrientation  orientation = [[[UIDevice currentDevice] valueForKey:@"orientation"] intValue];
    BOOL batteryMonitoringEnabled = [[[UIDevice currentDevice] valueForKey:@"batteryMonitoringEnabled"] boolValue];
    UIDeviceBatteryState  batteryState = [[[UIDevice currentDevice] valueForKey:@"batteryState"] intValue];
    float batteryLevel = [[[UIDevice currentDevice] valueForKey:@"batteryLevel"] floatValue];

    BOOL proximityMonitoringEnabled = [[[UIDevice currentDevice] valueForKey:@"proximityMonitoringEnabled"] intValue];
    BOOL proximityState = [[[UIDevice currentDevice] valueForKey:@"proximityState"] intValue];
    BOOL multitaskingSupported = [[[UIDevice currentDevice] valueForKey:@"multitaskingSupported"] intValue];

    
    NSLog(@"\nname=%@, \nmodel=%@, \nlocalizedModel=%@, \nsystemName=%@, \nsystemVersion=%@, \norientation=%ld, \nbatteryMonitoringEnabled=%d, \nbatteryState=%ld, \nbatteryLevel=%f, \nproximityMonitoringEnabled=%d, \nproximityState=%d, \nmultitaskingSupported=%d", name, model, localizedModel, systemName, systemVersion, (long)orientation, batteryMonitoringEnabled, (long)batteryState, batteryLevel, proximityMonitoringEnabled, proximityState, multitaskingSupported);
           

打印出的结果如下：

name=hxm的Mac mini, 

model=iPhone, 

localizedModel=iPhone, 

systemName=iOS, 

systemVersion=10.2, 

orientation=0, 

batteryMonitoringEnabled=0, 

batteryState=0, 

batteryLevel=-1.000000, 

proximityMonitoringEnabled=0, 

proximityState=0, 

multitaskingSupported=1