iOS获取和监测设备基本信息——UIDevice的使用

//获取当前设备单例

• (UIDevice *)currentDevice;

//获取当前设备名称
@property(nonatomic,readonly,strong) NSString *name; // e.g. "My iPhone"
//获取当前设备模式
@property(nonatomic,readonly,strong) NSString *model; // e.g. @"iPhone", @"iPod touch"
//获取本地化的当前设备模式
@property(nonatomic,readonly,strong) NSString *localizedModel; // localized version of model
//获取系统名称
@property(nonatomic,readonly,strong) NSString *systemName; // e.g. @"iOS"
//获取系统版本
@property(nonatomic,readonly,strong) NSString *systemVersion; // e.g. @"4.0"
//获取设备方向
@property(nonatomic,readonly) UIDeviceOrientation orientation;
//获取设备UUID对象
@property(nullable, nonatomic,readonly,strong) NSUUID *identifierForVendor;
//是否开启监测电池状态 开启后 才可以正常获取电池状态
@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0); // default is NO
//获取电池状态
@property(nonatomic,readonly) UIDeviceBatteryState batteryState NS_AVAILABLE_IOS(3_0);
//获取电量
@property(nonatomic,readonly) float batteryLevel NS_AVAILABLE_IOS(3_0);
设备方向的枚举如下：

typedef NS_ENUM(NSInteger, UIDeviceOrientation) {

UIDeviceOrientationUnknown,
UIDeviceOrientationPortrait,            // home键在下
UIDeviceOrientationPortraitUpsideDown,  // home键在上
UIDeviceOrientationLandscapeLeft,       // home键在右
UIDeviceOrientationLandscapeRight,      // home键在左
UIDeviceOrientationFaceUp,              // 屏幕朝上
UIDeviceOrientationFaceDown             // 屏幕朝下

};
电池状态的枚举如下：

typedef NS_ENUM(NSInteger, UIDeviceBatteryState) {

UIDeviceBatteryStateUnknown,
UIDeviceBatteryStateUnplugged,   // 放电状态
UIDeviceBatteryStateCharging,    // 充电未充满状态
UIDeviceBatteryStateFull,        // 充电已充满

};
下面的方法关于监测屏幕状态：

//获取是否开启屏幕状态更改通知
@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications;
//开始监测通知

• (void)beginGeneratingDeviceOrientationNotifications;

//结束监测通知

• (void)endGeneratingDeviceOrientationNotifications;

下面这两个放大与距离传感器应用相关，可参考：http://my.oschina.net/u/2340880/blog/544341.

@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); //开启距离传感器
//是否触发了距离传感器
@property(nonatomic,readonly) BOOL proximityState
相关通知：

//设备方向改变时发送的通知
UIKIT_EXTERN NSString *const UIDeviceOrientationDidChangeNotification;
//电池状态改变时发送的通知
UIKIT_EXTERN NSString *const UIDeviceBatteryStateDidChangeNotification NS_AVAILABLE_IOS(3_0);
//电量改变时发送的通知
UIKIT_EXTERN NSString *const UIDeviceBatteryLevelDidChangeNotification NS_AVAILABLE_IOS(3_0);
//距离传感器状态改变时发送的通知
UIKIT_EXTERN NSString *const UIDeviceProximityStateDidChangeNotification NS_AVAILABLE_IOS(3_0);