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UIDevice

2015-10-29 19:31 417 查看
UIDevice

UIDevice提供了多种属性、类函数及状态通知,帮助我们全方位了解设备状况。从检测电池电量到定位设备与临近感应,UIDevice所做的工作就是为应用程序提供用户及设备的一些信息。UIDevice类还能够收集关于设备的各种具体细节,例如机型及iOS版本等。其中大部分属性都对开发工作具有积极的辅助作用。下面的代码简单的使用UIDevice获取手机属性。

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
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