iOS获取设备信息详解手机开发

获取iOS设备信息需要用到UIDevice类，UIDevice.h文件定义了这些属性：

    @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;       // return current device orientation.  this will return UIDeviceOrientationUnknown unless device orientation notifications are being generated.   
       
    @property(nonatomic,readonly,retain) NSUUID      *identifierForVendor NS_AVAILABLE_IOS(6_0);      // a UUID that may be used to uniquely identify the device, same across apps from a single vendor.   
       
    @property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications;   
       
    @property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0);  // default is NO   
    @property(nonatomic,readonly) UIDeviceBatteryState          batteryState NS_AVAILABLE_IOS(3_0);  // UIDeviceBatteryStateUnknown if monitoring disabled   
    @property(nonatomic,readonly) float                         batteryLevel NS_AVAILABLE_IOS(3_0);  // 0 .. 1.0. -1.0 if UIDeviceBatteryStateUnknown   
       
    @property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); // default is NO   
    @property(nonatomic,readonly)                            BOOL proximityState NS_AVAILABLE_IOS(3_0);  // always returns NO if no proximity detector   
       
    @property(nonatomic,readonly,getter=isMultitaskingSupported) BOOL multitaskingSupported NS_AVAILABLE_IOS(4_0);   
       
    @property(nonatomic,readonly) UIUserInterfaceIdiom userInterfaceIdiom NS_AVAILABLE_IOS(3_2);  

下面通过简单例子介绍这些属性！

环境：Xcode 6.1，iOS 8.1

设备：iPhone 4s（iOS 7.1.1）

代码如下：

    // 获取设备信息   
    - (void) getDevInfo   
    {   
        UIDevice* myDevice = [UIDevice currentDevice];   
        NSLog(@"设备名称 - %@", myDevice.name);   
        NSLog(@"设备模式 - %@", myDevice.model);   
        NSLog(@"设备本地模式 - %@", myDevice.localizedModel);   
        NSLog(@"系统名称 - %@", myDevice.systemName);   
        NSLog(@"系统版本 - %@", myDevice.systemVersion);   
           
    //    typedef NS_ENUM(NSInteger, UIDeviceOrientation) {   
    //        UIDeviceOrientationUnknown,   
    //        UIDeviceOrientationPortrait,            // Device oriented vertically, home button on the bottom   
    //        UIDeviceOrientationPortraitUpsideDown,  // Device oriented vertically, home button on the top   
    //        UIDeviceOrientationLandscapeLeft,       // Device oriented horizontally, home button on the right   
    //        UIDeviceOrientationLandscapeRight,      // Device oriented horizontally, home button on the left   
    //        UIDeviceOrientationFaceUp,              // Device oriented flat, face up   
    //        UIDeviceOrientationFaceDown             // Device oriented flat, face down   
    //    };   
        NSLog(@"设备朝向 - %d", myDevice.orientation);  // 详见UIDeviceOrientation   
           
        NSLog(@"设备UUID - %@", myDevice.identifierForVendor);   
           
        // 当前设备是否有转向通知   
        NSLog(@"设备转向通知（BOOL） - %hhd", myDevice.generatesDeviceOrientationNotifications);   
           
        // 是否启动电池监控，默认为NO   
        NSLog(@"电池监控启用状态（BOOL） - %hhd", myDevice.batteryMonitoringEnabled);   
           
    //    typedef NS_ENUM(NSInteger, UIDeviceBatteryState) {   
    //        UIDeviceBatteryStateUnknown,   
    //        UIDeviceBatteryStateUnplugged,   // on battery, discharging   
    //        UIDeviceBatteryStateCharging,    // plugged in, less than 100%   
    //        UIDeviceBatteryStateFull,        // plugged in, at 100%   
    //    };              // available in iPhone 3.0   
        NSLog(@"电池状态 - %d", myDevice.batteryState);  // 详见UIDeviceBatteryState   
           
        // 电量百分比， 0到1.0，如果电池状态为UIDeviceBatteryStateUnknown，则百分比为-1.0   
        NSLog(@"电池电量 - %f", myDevice.batteryLevel);   
           
        // 是否启动接近监控（比如脸接近手机屏），默认为NO   
        NSLog(@"接近监控启用状态（BOOL） - %hhd", myDevice.proximityMonitoringEnabled);   
           
        // 如果没有接近感应器，则返回NO   
        NSLog(@"接近状态（BOOL） - %hhd", myDevice.proximityState);   
           
        NSLog(@"是否支持多任务（BOOL） - %hhd", myDevice.multitaskingSupported);   
           
    //    typedef NS_ENUM(NSInteger, UIUserInterfaceIdiom) {   
    //        UIUserInterfaceIdiomUnspecified = -1,   
    //#if __IPHONE_3_2 <= __IPHONE_OS_VERSION_MAX_ALLOWED   
    //        UIUserInterfaceIdiomPhone,           // iPhone and iPod touch style UI   
    //        UIUserInterfaceIdiomPad,             // iPad style UI   
    //#endif   
    //    };   
        NSLog(@"用户界面模式 - %d", myDevice.userInterfaceIdiom);  // 详见UIUserInterfaceIdiom   
    }  

打印结果：

    2015-01-29 11:35:23.294 TestProject[261:60b] 设备名称 - iPhone   
    2015-01-29 11:35:23.297 TestProject[261:60b] 设备模式 - iPhone   
    2015-01-29 11:35:23.298 TestProject[261:60b] 设备本地模式 - iPhone   
    2015-01-29 11:35:23.300 TestProject[261:60b] 系统名称 - iPhone OS   
    2015-01-29 11:35:23.302 TestProject[261:60b] 系统版本 - 7.1.1   
    2015-01-29 11:35:23.303 TestProject[261:60b] 设备朝向 - 0   
    2015-01-29 11:35:23.311 TestProject[261:60b] 设备UUID - <__NSConcreteUUID 0x16565a90> 7737D97A-35F6-4C0E-B0EC-DF1D711D99E1   
    2015-01-29 11:35:23.313 TestProject[261:60b] 设备转向通知（BOOL） - 0   
    2015-01-29 11:35:23.314 TestProject[261:60b] 电池监控启用状态（BOOL） - 0   
    2015-01-29 11:35:23.316 TestProject[261:60b] 电池状态 - 0   
    2015-01-29 11:35:23.317 TestProject[261:60b] 电池电量 - -1.000000   
    2015-01-29 11:35:23.319 TestProject[261:60b] 接近监控启用状态（BOOL） - 0   
    2015-01-29 11:35:23.321 TestProject[261:60b] 接近状态（BOOL） - 0   
    2015-01-29 11:35:23.322 TestProject[261:60b] 是否支持多任务（BOOL） - 1   
    2015-01-29 11:35:23.324 TestProject[261:60b] 用户界面模式 - 0