传感器

摇一摇

先说一个简单的
直接在你的appdelegate.m调用以下三个方法

/**
* 开始摇晃时调用
*
* @param motion 摇晃事件类型
* @param event 事件
*/
-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
NSLog(@”%s”,func);

}

-(void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
NSLog(@”%s”,func);

}

-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
NSLog(@”%s”,func);

}
恭喜你， 你已经实现了摇一摇了
是不是很简单啊

距离传感器

建一个ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

/** *  添加距离传感器检测 */[self addDistanceSensor];

}

-(void)addDistanceSensor
{
[[UIDevice currentDevice]setProximityMonitoringEnabled:YES];

// 1.通知 可在子线程或者主线程执行[[NSNotificationCenter defaultCenter]addObserverForName:UIDeviceProximityStateDidChangeNotification object:nil queue:[[NSOperationQueue alloc]init] usingBlock:^(NSNotification *note) {        NSLog(@"%@",[NSThread currentThread]);    if ([[UIDevice currentDevice] proximityState])    {

// [self.centerButton setTitle:@”有人接近” forState:UIControlStateNormal];

        NSLog(@"有人接近了");    }else    {        [self.centerButton setTitle:@"有人接近过" forState:UIControlStateNormal];    }}];//.2 原来的通知[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(note) name:UIDeviceProximityStateDidChangeNotification object:nil];

}

-(void)note
{
if ([[UIDevice currentDevice] proximityState])
{

    //            [self.centerButton setTitle:@"有人接近" forState:UIControlStateNormal];    NSLog(@"有人接近了");}else{    [self.centerButton setTitle:@"有人接近过" forState:UIControlStateNormal];}

}

-(void)dealloc
{

warning !!!!—通知必须在dealloc处移除

[[NSNotificationCenter defaultCenter]removeObserver:self];

}
@end

现在实现了打电话屏幕变黑的功能

加速传感器

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.

  /**

  • 添加加速计传感器检测
    */
    [self addAccelerationSensorByUIAccelerometer];
    [self addAccelerationSensorByCoreMotion];
    [self addAccelerationSensorByCoreMotionUsingPull];

}

-(void)touchesBegan:(NSSet )touches withEvent:(UIEvent )event
{
CMAccelerometerData *accelerometerData = self.mgr.accelerometerData;

NSLog(@"%f----%f",accelerometerData.acceleration.x,accelerometerData.acceleration.y);

}

pragma mark 加速器

// 1.UIAccelerometer
-(void)addAccelerationSensorByUIAccelerometer
{
UIAccelerometer *alt = [UIAccelerometer sharedAccelerometer];

alt.delegate = self;alt.updateInterval = 1.0f;

}

-(void)accelerometer:(UIAccelerometer )accelerometer didAccelerate:(UIAcceleration )acceleration
{
NSLog(@”x:%f—y:%f—z:%f”,acceleration.x,acceleration.y,acceleration.z);

}

// 1.CoreMotion
-(void)addAccelerationSensorByCoreMotion
{
self.mgr = [[CMMotionManager alloc]init];

if (self.mgr.isMagnetometerAvailable){    self.mgr.accelerometerUpdateInterval = 1.0f;    [self.mgr startAccelerometerUpdatesToQueue:[[NSOperationQueue alloc]init] withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {        NSLog(@"%f----%f",accelerometerData.acceleration.x,accelerometerData.acceleration.y);    }];}else{    NSLog(@"不可用");}

}

-(void)clickButton:(UIButton *)sender
{
// [self.mgr stopMagnetometerUpdates];

self.mgr = nil;

// [self.mgr stopMagnetometerUpdates];

}

-(void)addAccelerationSensorByCoreMotionUsingPull
{
self.mgr = [[CMMotionManager alloc]init];

if (self.mgr.isMagnetometerAvailable){    [self.mgr startAccelerometerUpdates];}else{    NSLog(@"不可用");}

}

@end

磁力计

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  //共5个步骤
  //1 首先初始化一个地位管理器
  self.locaManager =[[CLLocationManager alloc]init];
  self.locaManager.delegate = self;

  //设置图片的位置
  self.myImageView = [[UIImageView alloc]initWithFrame:CGRectMake(80, 200, 200, 200)];
  // self.myImageView.contentMode = UIViewContentModeCenter;
  self.myImageView.image = [UIImage imageNamed:@”zhinanzhen2”];
  [self.view addSubview:self.myImageView];

  //创建lable 放置手机与正北方向的夹角
  self.myLable = [[UILabel alloc]initWithFrame:CGRectMake(80, 420, 200, 60)];
  self.myLable.backgroundColor =[UIColor orangeColor];
  self.myLable.textAlignment = NSTextAlignmentCenter;
  [self.view addSubview:self.myLable];

  UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
  button.frame = CGRectMake(115, 100, 140, 60);
  // button.frame = CGRectMake(100, 10, 100, 40);
  [self.view addSubview:button];
  [button addTarget:self action:@selector(buttonClick) forControlEvents:(UIControlEventTouchUpInside)];
  [button setTitle:@”打开设备磁力计” forState:UIControlStateNormal];
  [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
  button.backgroundColor = [UIColor yellowColor];

  //检测是否启用位置服务功能
  if ([CLLocationManager locationServicesEnabled]) {
  NSLog(@”locationServices isEnable”);

  //2 设置精度（越精确就越耗电）self.locaManager.desiredAccuracy = kCLLocationAccuracyBest;// 3.设置距离筛选器(每隔多少米定位一次)self.locaManager.distanceFilter = 100.0f;// 4.启动 位置管理器进行定位[locationManagerstartUpdatingLocation];  如果我们不需要继续轮询更新位置可以使用[locationManager stopUpdatingLocation];停止更新，否则应用程序打开会一直更新，这些都需要添加委托的，遵循CLLocationManagerDelegate协议[self.locaManager startUpdatingHeading];

  }else
  {
  NSLog(@”定位服务不可用”);
  }
  }

• (void)buttonClick
  {
  //判断设备上的磁力计是否可以使用
  if ([CLLocationManager headingAvailable]){
  //headingAvailable该设备是否支持磁力计计算方向
  [self.locaManager startUpdatingHeading];
  }else{
  UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@”警告” message:@”没有查找到磁力计设备” preferredStyle:UIAlertControllerStyleAlert];
  UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@”确认” style:UIAlertActionStyleDefault handler:nil];
  [alertC addAction:alertAction];
  [self presentViewController:alertC animated:YES completion:nil];

  }

}

//当调用了startUpdatingHeading方法后，就开始不断地定位用户的位置，中途会频繁地调用下面的代理方法,这里定位出的结果是用户与真实北方的夹角
- (void)locationManager:(CLLocationManager )manager didUpdateHeading:(CLHeading )newHeading//CLHeading:该对象设备的移动方向
{

//将角度值转化为弧度制CGFloat heading = -1.0f * M_PI * newHeading.magneticHeading / 180.0f;//手机方向与真实北方（磁头方向）的夹角self.myLable.text=[[NSString alloc]initWithFormat:@"手机正方向与正北夹角:%.2f",newHeading.magneticHeading];//视图的旋转属性//图片的方向与真实的北方一致//CGAffineTranFormMakeRotation需要一个弧度制的参数 实现图片的旋转[UIView animateWithDuration:1 animations:^{    self.myImageView.transform = CGAffineTransformMakeRotation(heading);} completion:^(BOOL finished) {    NSLog(@"动画结束");}];

}
//协议方法:定位用户信息出现错误时执行以下方法
- (void)locationManager:(CLLocationManager )manager didFailWithError:(NSError )error
{
NSLog(@”error”);
}
// 5. 最后一步不要忘记关掉传感器数据的更新
- (void)viewWillDisappear:(BOOL)animated{

if ([CLLocationManager locationServicesEnabled]) {    //        [self.locationManager stopUpdatingLocation];    [self.locaManager stopUpdatingHeading];}

}