UIDevice provides a variety of attributes, class functions and status notifications to help us understand the device status in all aspects. From detecting battery power to positioning the device and proximity sensing, UIDevice does a job providing the application with some information about the user and the device. The UIDevice class can also collect various specific details about the device, such as the model and iOS version. Most of these attributes have a positive auxiliary role in development work. The following code simply uses UIDevice to obtain the mobile phone properties.
Simple example: Obtaining device-related information NSString *strName = [[UIDevice currentDevice] name];
NSLog(@"Device name: %@", strName);//. "My iPhone"
NSString *strId = [[UIDevice currentDevice] uniqueIdentifier];
NSLog(@"Device unique identifier: %@", strId);//UUID, unavailable after 5.0.
NSString *strSysName = [[UIDevice currentDevice] systemName];
NSLog(@"System name: %@", strSysName);// . @"iOS"
NSString *strSysVersion = [[UIDevice currentDevice] systemVersion];
NSLog(@"System Version Number: %@", strSysVersion);// . @"4.0"
NSString *strModel = [[UIDevice currentDevice] model];
NSLog(@"Device Mode: %@", strModel);// . @"iPhone", @"iPod touch"
NSString *strLocModel = [[UIDevice currentDevice] localizedModel];
NSLog(@"local device mode: %@", strLocModel);// localized version of model
Common methods are listed://Get the current device single case
+ (UIDevice *)currentDevice;
//Get the current device name
@property(nonatomic,readonly,strong) NSString *name; // . "My iPhone"
//Get the current device mode
@property(nonatomic,readonly,strong) NSString *model; // . @"iPhone", @"iPod touch"
//Get localized current device mode
@property(nonatomic,readonly,strong) NSString *localizedModel; // localized version of model
//Get the system name
@property(nonatomic,readonly,strong) NSString *systemName; // . @"iOS"
//Get the system version
@property(nonatomic,readonly,strong) NSString *systemVersion; // . @"4.0"
//Get the device direction
@property(nonatomic,readonly) UIDeviceOrientation orientation;
//Get the device UUID object
@property(nullable, nonatomic,readonly,strong) NSUUID *identifierForVendor;
// Whether to enable the monitoring of the battery status? Only after it is turned on can the battery status be obtained normally
@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0); // default is NO
//Get the battery status
@property(nonatomic,readonly) UIDeviceBatteryState batteryState NS_AVAILABLE_IOS(3_0);
//Get power
@property(nonatomic,readonly) float batteryLevel NS_AVAILABLE_IOS(3_0);
The enumeration of device directions is as follows:typedef NS_ENUM(NSInteger, UIDeviceOrientation) {
UIDeviceOrientationUnknown,
UIDeviceOrientationPortrait,
UIDeviceOrientationPortraitUpsideDown, // Home button is on
UIDeviceOrientationLandscapeLeft, // The home key is on the right
UIDeviceOrientationLandscapeRight, // The home key is on the left
UIDeviceOrientationFaceUp, // The screen faces up
UIDeviceOrientationFaceDown �
};
The enumeration of battery status is as follows:typedef NS_ENUM(NSInteger, UIDeviceBatteryState) {
UIDeviceBatteryStateUnknown,
UIDeviceBatteryStateUnplugged, // Discharge state
UIDeviceBatteryStateCharging, // Charging is not fully charged
UIDeviceBatteryStateFull, // Charging is full
};
The following method is about monitoring screen status://Get notification of whether to enable screen status change
@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications;
//Notification of monitoring
- (void)beginGeneratingDeviceOrientationNotifications;
//End monitoring notice
- (void)endGeneratingDeviceOrientationNotifications;
The following two amplifications are related to the distance sensor application@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); //Open the distance sensor
//Whether the distance sensor is triggered
@property(nonatomic,readonly) BOOL proximityState
Related notices://Notification sent when the device direction changes
UIKIT_EXTERN NSString *const UIDeviceOrientationDidChangeNotification;
//Notification sent when the battery state changes
UIKIT_EXTERN NSString *const UIDeviceBatteryStateDidChangeNotification NS_AVAILABLE_IOS(3_0);
//Notification sent when the power changes
UIKIT_EXTERN NSString *const UIDeviceBatteryLevelDidChangeNotification NS_AVAILABLE_IOS(3_0);
//Notification sent when the distance sensor state changes
UIKIT_EXTERN NSString *const UIDeviceProximityStateDidChangeNotification NS_AVAILABLE_IOS(3_0);