IOS 获取设备相关特性

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IOS 获取设备相关特性

一、判断手机是否插入了SIM卡

解答：

A. 私有 API 检测

[CTSIMSupportGetSIMStatus()isEqualToString:kCTSIMSupportSIMStatusNotInserted]可以判断是否插入了 sim卡。

前提是把下面的代码随便复制到一个头文件里面，然后引入CoreTelephony.framework即可。

1 extern NSString* c*****tkCTSMSMessageReceivedNotification;

3 extern NSString* c*****tkCTSMSMessageReplaceReceivedNotification;

5 extern NSString* c*****tkCTSIMSupportSIMStatusNotInserted;

7 extern NSString* c*****t kCTSIMSupportSIMStatusReady;

10 id CTTelephonyCenterGetDefault(void);

12 void CTTelephonyCenterAddObserver(id,id,CFNotificationCallback,NSString*,void*,int);

14 voidCTTelephonyCenterRemoveObserver(id,id,NSString*,void*);

16 int CTSMSMessageGetUnreadCount(void);

18 int CTSMSMessageGetRecordIdentifier(void * msg);

20 NSString * CTSIMSupportGetSIMStatus();

22 NSString * CTSIMSupportCopyMobileSubscriberIdentity();

24 id CTSMSMessageCreate(void* unknow,NSString*number,NSString* text);

26 void * CTSMSMessageCreateReply(void* unknow,void *forwardTo,NSString* text);

28 void* CTSMSMessageSend(id server,id msg);

30 NSString *CTSMSMessageCopyAddress(void *, void *);

32 NSString *CTSMSMessageCopyText(void *, void *);

B. 开放 API 检测（有待改进，飞行模式下检测不到）

1 -(BOOL)simExist {

3 CTTelephonyNetworkInfo *info =[[CTTelephonyNetworkInfo alloc] init];

5 CTCarrier *carrier = [info subscriberCellularProvider];

7 //NSString *code = [carriermobileNetworkCode];

9 NSString *isoCountryCode =[carrier isoCountryCode];

11 if (isoCountryCode == nil ||isoCountryCode.length == 0) {

13 NSLog(@"no sim");

15 return NO;

16 } else {

18 NSLog(@"sim exist");

20 return YES;

21 }

22 }

二、获取更换 SIM卡后的通知（只有更换前后的 SIM 运营商不同才能收到）

解答：

1 //初始化

2 CTTelephonyNetworkInfo *networkInfo = [[CTTelephonyNetworkInfo alloc] init];

4 //当sim卡更换时弹出此窗口

5 networkInfo.subscriberCellularProviderDidUpdateNotifier = ^(CTCarrier *carrier) {

7 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"Sim card changed" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];

9 [alert show];

10 };

三、获取 SIM卡信息

解答：

1 //初始化

2 CTTelephonyNetworkInfo *networkInfo = [[CTTelephonyNetworkInfo alloc] init];

4 //获取sim卡信息

5 CTCarrier *carrier = networkInfo.subscriberCellularProvider;

7 //供应商名称（中国联通中国移动）

8 carrier.carrierName;

10 //所在国家编号

11 carrier.mobileCountryCode;

13 //供应商网络编号

14 carrier.mobileNetworkCode;

16 // iso国家编号

17 carrier.isoCountryCode;

19 //是否允许voip

20 carrier.allowsVOIP;

四、判断锁屏状态

解答：

A. 私有 API 检测

1 #import <SpringBoard/SBAwayController.h>

3 //一句话搞定

4 if ([[objc_getClass("SBAwayController")sharedAwayController] isLocked]) {

6 PrintLog(@"doublecheck Home ,now YES Lock");

7 } else {

9 PrintLog(@"double check Home ,now NOLock");

10 }

B. 程序在前台，这种比较简单。直接使用Darwin层的通知就可以了

1 #import <notify.h>

3 #define NotificationLockCFSTR("com.apple.springboard.lockcomplete")

4 #define NotificationChangeCFSTR("com.apple.springboard.lockstate")

5 #define NotificationPwdUICFSTR("com.apple.springboard.hasBlankedScreen")

8 static voidscreenLockStateChanged(CFNotificationCenterRef center,void*observer,CFStringRef name,const void* object,CFDictionaryRef userInfo) {

10 NSString*lockstate = (__bridge NSString*)name;

12 if ([lockstateisEqualToString:(__bridge NSString*)NotificationLock]) {

14 NSLog(@"locked.");

15 } else {

17 NSLog(@"lock state changed.");

18 }

19 }

22 - (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

24 // Overridepoint for customization after application launch.

25 CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),NULL, screenLockStateChanged, NotificationLock, NULL,CFNotificationSuspensionBehaviorDeliverImmediately);

27 CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),NULL, screenLockStateChanged, NotificationChange, NULL,CFNotificationSuspensionBehaviorDeliverImmediately);

29 //setScreenStateCb();

30 return YES;

31 }

C. 程序退后台后，这时再锁屏就收不到上面的那个通知了，需要另外一种方式, 以循环的方式一直来检测是否是锁屏状态，会消耗性能并可能被苹果挂起

1 static voidsetScreenStateCb() {

3 uint64_tlocked;

5 __block inttoken = 0;

7 notify_register_dispatch("com.apple.springboard.lockstate",&token,dispatch_get_main_queue(),^(intt) {

8 });

10 notify_get_state(token, &locked);

12 NSLog(@"%d",(int)locked);

13 }

16 -(void)applicationDidEnterBackground:(UIApplication *)application {

18 while (YES) {

20 setScreenStateCb();

22 sleep(1);

23 }

24 }

关于 notify.h 请移步到：

https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/notify_register_check.3.html

五、获取电池状态（是否正在充电）

解答：

通过 UIDeviceBatteryStateDidChangeNotification 通知可以获取手机是否处于充电状态。

1 (void)batteryMoniter {

3 UIDevice *device = [UIDevice currentDevice];

5 device.batteryMonitoringEnabled = YES;

7 if (device.batteryState == UIDeviceBatteryStateUnknown) {

9 NSLog(@"UnKnow");

10 }else if (device.batteryState == UIDeviceBatteryStateUnplugged){

12 NSLog(@"Unplugged");

13 }else if (device.batteryState == UIDeviceBatteryStateCharging){

15 NSLog(@"Charging");

16 }else if (device.batteryState == UIDeviceBatteryStateFull){

18 NSLog(@"Full");

19 }

21 NSLog(@"%f",device.batteryLevel);

22 }

六、获取电池电量

解答：

1 UIDevice *device = [UIDevice currentDevice];

3 device.batteryMonitoringEnabled = YES;

5 NSLog(@"%f",device.batteryLevel);//简单的这句就是了。

7 ＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃

9 Having said that, I would not use a timer event for this, it is pretty inefficient. You want to use KVO instead:

11 - (void) viewWillAppear:(BOOL)animated {

13 UIDevice *device = [UIDevice currentDevice];

15 device.batteryMonitoringEnabled = YES;

17 currentCharge.text = [NSString stringWithFormat:@"%.2f", device.batteryLevel];

19 [device addObserver:self forKeyPath:@"batteryLevel" options:0x0 context:nil];

21 [super viewWillAppear:animated];

22 }

25 - (void) viewDidDisappear:(BOOL)animated {

27 UIDevice *device = [UIDevice currentDevice];

29 device.batteryMonitoringEnabled = NO;

31 [device removeObserver:self forKeyPath:@"batteryLevel"];

33 [super viewDidDisappear:animated];

34 }

37 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {

39 UIDevice *device = [UIDevice currentDevice];

41 if ([object isEqual:device] && [keyPath isEqual:@"batteryLevel"]) {

43 currentCharge.text = [NSString stringWithFormat:@"%.2f", device.batteryLevel];

45 }

46 }

http://stackoverflow.com/questions/6161318/how-to-determine-whether-ios-device-is-connected-to-desktop-computer-and-itunes

EAAccessory相关方法需要Iphone的外设配件支持，只有在配件通过30pin、蓝牙、USB的方式连接iOS设备时，才能够通过该方法来检测是否连接（外设配件）的状态。外设的相关设置，需要在info.plist中添加UISupportedExternalAccessoryProtocols键，需要把pc端设置成iPhone的外设备才行,这一步不知道怎么做了。

七、获取 SIM 卡信号强度

解答：

私有 API获取

1 intgetSignalStrength() {

3 void *libHandle =dlopen("/System/Library/Frameworks/CoreTelephony.framework/CoreTelephony",RTLD_LAZY);

5 int (*CTGetSignalStrength)();

7 CTGetSignalStrength = dlsym(libHandle,"CTGetSignalStrength");

9 if( CTGetSignalStrength == NULL) {

11 NSLog(@"Couldnot find CTGetSignalStrength");

12 }

14 int result = CTGetSignalStrength();

16 dlclose(libHandle);

17 return result;

18 }

以上代码获取 RSSI的值为正，函数拿到的是 rssi，转换成 dbm需要剪掉 113

可以用class-dump这个工具来导出库里的头文件结构（包含了私有API）

八、获取 WIFI 的信息（WIFI列表和强度）

解答：

1 - (id)fetchSSIDInfo {

3 NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();

5 NSLog(@"Supported interfaces: %@", ifs);

7 id info = nil;

9 for (NSString *ifnam in ifs) {

11 info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);

13 NSLog(@"%@ => %@", ifnam, info);

15 if (info && [info count]) { break; }

16 }

18 return info;

19 }

九、判断当前应用的定位服务是否可用

解答：

用到地图定位的时候，会判断定位是否可用来初始化定位服务。但是以前的方法是判断所有应用的定位服务，无法指定到当前的应用是否开启服务。下面的就可以直接搞定这个问题。

1 //[CLLocationManager locationServicesEnabled]判断全局的定位功能是否可用

2 if ([CLLocationManager locationServicesEnabled] && ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorized || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)) {

4 //定位功能可用，开始定位

5 _locationManger = [[CLLocationManager alloc] init];

7 locationManger.delegate = self;

9 [locationManger startUpdatingLocation];

10 } else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied){

12 NSlog("定位功能不可用，提示用户或忽略");

13 }

十、监测网络状态的改变

解答：

1 -(void)startNetCheck {

3 NSLog(@"探测网络开始，startNetCheck");

5 [AFNetworkReachabilityManagermanagerForDomain:@"www.baidu.com"];

7 [[AFNetworkReachabilityManagersharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatusstatus) {

9 NSLog(@"探测网络结果[%d]",status);

11 //发送通知

12 [[NSNotificationCenterdefaultCenter]postNotificationName:RcSGlobalNoticeNetworkChangeobject:@(status)];

13 }];

15 [[AFNetworkReachabilityManagersharedManager] startMonitoring];

16 }

十一、监测蓝牙开启状态

解答：

添加类库：

CoreBluetooth.framework

导入：

#import<CoreBluetooth/CoreBluetooth.h>

初始化并设置代理：

CBCentralManager*centralManager = [[CBCentralManager alloc] initWithDelegate:selfqueue:nil];

实现代码方法：

1 -(void)peripheralManagerDidUpdateState:(CBPeripheralManager*)peripheral {

3 switch (peripheral.state) {

5 //蓝牙开启且可用

6 caseCBPeripheralManagerStatePoweredOn: {

8 NSLog(@"Bluetoothis currently powered on and available to use.");

9 }

10 break；

11 default:

13 NSLog(@"PeripheralManager did change state");

15 break;

16 }

17 }

十二、红外感应（距离感应器）

解答：

1 - (void)handleNotification:(BOOL)state{

3 [[UIDevicecurrentDevice]setProximityMonitoringEnabled:state];//设置红外感应是否可用

5 if(state) {//添加监听

7 [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(sensorStateChange:) name:@"UIDeviceProximityStateDidChangeNotification"object:nil];

8 }else {//移除监听

10 [[NSNotificationCenterdefaultCenter]removeObserver:self name:@"UIDeviceProximityStateDidChangeNotification"object:nil];

11 }

13 //处理监听触发事件

14 -(void)sensorStateChange:(NSNotificationCenter*)notification {

16 //如果此时手机靠近面部放在耳朵旁，那么声音将通过听筒输出，并将屏幕变暗（省电啊）

17 if([[UIDevicecurrentDevice]proximityState]== YES) {

19 NSLog(@"Deviceis close to user");

21 [[AVAudioSessionsharedInstance]setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

22 }else{

24 NSLog(@"Deviceis not close to user");

26 [[AVAudioSessionsharedInstance]setCategory:AVAudioSessionCategoryPlayback error:nil];

27 }

28 }

十三、监听程序失去active（比如按下home键）和成为active

解答：

第一步:

创建2个NSNotificationCenter监听

1. [[NSNotificationCenterdefaultCenter] addObserver:self selector:@selector(applicationWillResignActive:)name:UIApplicationWillResignActiveNotificationobject:nil];//监听是否触发home键挂起程序

3. [[NSNotificationCenterdefaultCenter] addObserver:self selector:@selector(applicationDidBecomeActive:)name:UIApplicationDidBecomeActiveNotificationobject:nil];//监听是否重新进入程序程序

第二步:

实现2个NSNotificationCenter所触发的事件方法

1. (void)applicationWillResignActive:(NSNotification*)notification{

3. printf("按理说是触发home按下\n");

4. }

6. -(void)applicationDidBecomeActive:(NSNotification*)notification{

8. printf("按理说是重新进来后响应\n");

9. }

十四、监听输出设备变化（耳机插拔、蓝牙设备断与连）

解答：

在ios6以前，我们有如下的方法：

1. #import<AVFoundation/AVFoundation.h>

3. [[AVAudioSession sharedInstance] setDelegate:self];

5. AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange,audioRouteChangeListenerCallback, self);

然后实现该回调：

1. //音频监控回调函数

2. static void audioRouteChangeListenerCallback(void *inUserData, AudioSessionPropertyID inPropertyID, UInt32inPropertyValueSize, const void *inPropertyValue) {

4. if (inPropertyID != kAudioSessionProperty_AudioRouteChange){

6. return;

7. }

8. // Determines the reason for the routechange, to ensure that it is not

9. // because of a category change.

10.

11. CFDictionaryRef routeChangeDictionary =inPropertyValue;

12.

13. CFNumberRef routeChangeReasonRef =CFDictionaryGetValue (routeChangeDictionary, CFSTR (kAudioSession_AudioRouteChangeKey_Reason));

14.

15. SInt32 routeChangeReason;

16.

17. CFNumberGetValue (routeChangeReasonRef,kCFNumberSInt32Type,&routeChangeReason);

18. // do your handling here

19. }

请注意[[AVAudioSession sharedInstance] setDelegate:self]一定不要遗漏，否则该回调应该无法触发。

－－－－－－－－－－－－－－分割线－－－－－－－－－－－－－－

上面的方法是ios6以前的实现方式，我们可以看出这个api是比较低级的实现，其回调还是c的实现方式，而不是我们平常习惯的oc实现。

因此在ios6及以后，上面的api被deprecated了（当然，你要是还这么用，也还是能够实现功能），我们有更好更高级的实现来解决问题：

1. [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(outputDeviceChanged:)name:AVAudioSessionRouteChangeNotificationobject:[AVAudioSessionsharedInstance]];

3. -(void)outputDeviceChanged:(NSNotification *)aNotification {

5. // do your jobs here

6. }

请注意，addobserver的参数填写：其中的object必须是[AVAudioSession sharedInstance]，而不是我们通常很多情况下填写的nil，此处若为nil，通知也不会触发。

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