UIDevice的简易说明

typedef NS_ENUM(NSInteger, UIDeviceOrientation) //设备方向

{

    UIDeviceOrientationUnknown,

    UIDeviceOrientationPortrait,                   // 竖向，头向上

    UIDeviceOrientationPortraitUpsideDown,  // 竖向，头向下

    UIDeviceOrientationLandscapeLeft,         // 横向，头向左

    UIDeviceOrientationLandscapeRight,       // 横向，头向右

    UIDeviceOrientationFaceUp,                   // 平放，屏幕朝下

    UIDeviceOrientationFaceDown                // 平放，屏幕朝下

};

typedef NS_ENUM(NSInteger, UIDeviceBatteryState) //电池状态

{

    UIDeviceBatteryStateUnknown,

    UIDeviceBatteryStateUnplugged,   // 未充电

    UIDeviceBatteryStateCharging,     // 正在充电

    UIDeviceBatteryStateFull,             // 满电

}; 

typedef NS_ENUM(NSInteger, UIUserInterfaceIdiom) //用户界面类型

{

//iOS3.2以上有效

#if __IPHONE_3_2 <= __IPHONE_OS_VERSION_MAX_ALLOWED

    UIUserInterfaceIdiomPhone,           // iPhone 和 iPod touch 风格

    UIUserInterfaceIdiomPad,              // iPad 风格

#endif

};

#define UI_USER_INTERFACE_IDIOM() ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)] ? [[UIDevice currentDevice] userInterfaceIdiom] : UIUserInterfaceIdiomPhone)

#define UIDeviceOrientationIsPortrait(orientation)  ((orientation) == UIDeviceOrientationPortrait || (orientation) == UIDeviceOrientationPortraitUpsideDown)

#define UIDeviceOrientationIsLandscape(orientation) ((orientation) == UIDeviceOrientationLandscapeLeft || (orientation) == UIDeviceOrientationLandscapeRight)

NS_CLASS_AVAILABLE_IOS(2_0) @interface UIDevice : NSObject {

 @private

    NSInteger _numDeviceOrientationObservers;

    float     _batteryLevel;

    struct {

unsigned int batteryMonitoringEnabled:1;

unsigned int proximityMonitoringEnabled:1;

unsigned int expectsFaceContactInLandscape:1;

        unsigned int orientation:3;

        unsigned int batteryState:2;

        unsigned int proximityState:1;

    } _deviceFlags;

}

+ (UIDevice *)currentDevice; // 获取当前设备

@property(nonatomic,readonly,retain) NSString    *name;                // e.g. "My iPhone"

@property(nonatomic,readonly,retain) NSString    *model;               // e.g. @"iPhone", @"iPod touch"

@property(nonatomic,readonly,retain) NSString    *localizedModel;    // localized version of model

@property(nonatomic,readonly,retain) NSString    *systemName;      // e.g. @"iOS"

@property(nonatomic,readonly,retain) NSString    *systemVersion;    // e.g. @"4.0"

@property(nonatomic,readonly) UIDeviceOrientation orientation;       // 除非正在生成设备方向的通知，否则返回UIDeviceOrientationUnknown 。

@property(nonatomic,readonly,retain) NSUUID      *identifierForVendor NS_AVAILABLE_IOS(6_0);      // 可用于唯一标识该设备，同一供应商不同应用具有相同的UUID 。

@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications; //是否生成设备转向通知

- (void)beginGeneratingDeviceOrientationNotifications; 

- (void)endGeneratingDeviceOrientationNotifications;

@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0);  // 是否启动电池监控，默认为NO

@property(nonatomic,readonly) UIDeviceBatteryState batteryState NS_AVAILABLE_IOS(3_0);  // 如果禁用电池监控，则电池状态为UIDeviceBatteryStateUnknown

@property(nonatomic,readonly) float batteryLevel NS_AVAILABLE_IOS(3_0);  //电量百分比， 0 .. 1.0。如果电池状态为UIDeviceBatteryStateUnknown，则百分比为-1.0

@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); // 是否启动接近监控（例如接电话时脸靠近屏幕），默认为NO

@property(nonatomic,readonly)  BOOL proximityState NS_AVAILABLE_IOS(3_0);  // 如果设备不具备接近感应器，则总是返回NO

@property(nonatomic,readonly,getter=isMultitaskingSupported) BOOL multitaskingSupported NS_AVAILABLE_IOS(4_0); // 是否支持多任务

@property(nonatomic,readonly) UIUserInterfaceIdiom userInterfaceIdiom NS_AVAILABLE_IOS(3_2); // 当前用户界面模式

- (void)playInputClick NS_AVAILABLE_IOS(4_2);  // 播放一个输入的声音

@end

@protocol UIInputViewAudioFeedback

@optional

@property (nonatomic, readonly) BOOL enableInputClicksWhenVisible; // 实现该方法，返回YES则自定义的视图能够播放输入的声音

@end

UIKIT_EXTERN NSString *const UIDeviceOrientationDidChangeNotification; // 屏幕方向变化通知

UIKIT_EXTERN NSString *const UIDeviceBatteryStateDidChangeNotification   NS_AVAILABLE_IOS(3_0); // 电池状态变化通知

UIKIT_EXTERN NSString *const UIDeviceBatteryLevelDidChangeNotification   NS_AVAILABLE_IOS(3_0); // 电池电量变化通知

UIKIT_EXTERN NSString *const UIDeviceProximityStateDidChangeNotification NS_AVAILABLE_IOS(3_0); // 接近状态变化通知