iOS传感器篇：CoreMotion初探
使用
CMAltimeter
气压计
#import
//设备是否支持气压计
NSLog(@"%d",[CMAltimeter isRelativeAltitudeAvailable]);
//启用气压计
self.altimeter = [[CMAltimeter alloc]init];
[self.altimeter startRelativeAltitudeUpdatesToQueue:NSOperationQueue.mainQueue withHandler:^(CMAltitudeData * _Nullable altitudeData, NSError * _Nullable error) {
NSLog(@"%lf",[altitudeData.relativeAltitude floatValue]);
NSLog(@"%@",error);
}];
导入
import
@property(strong,nonatomic)CMMotionManager *Manager;
使用
1. 创建CMMotionManager 对象
2. 为CMMotionManager设置获取加速度数据，螺旋仪数据，磁场数据频率，通常设置xxxUpdateInterval属性，单位时间为秒
// XXX 为：accelerometer(加速度)
// gyro(螺旋仪)
// magnetometer(磁场)
3. 调用CMMotionManger startXXXUpdatesToQueue:queue withHanlder:方法来周期性地获取数据，
4. 如果出现错误，想要中止获取这些数据 调用stopXXXUpdates 方法停止
self.Manager = [[CMMotionManager alloc]init];
NSOperationQueue *queque = [[NSOperationQueue alloc]init];
if (self.Manager.accelerometerActive) {
//设置CMMotionManager 的加速度更新频率为0.1s
self.Manager.accelerometerUpdateInterval = 0.1;
//使用代码块开始获取加速度数据
[self.Manager startAccelerometerUpdatesToQueue:queque withHandler:^(CMAccelerometerData * _Nullable accelerometerData, NSError * _Nullable error) {
if(error){
[self.Manager stopAccelerometerUpdates];
NSLog(@"获取加速度数据错误%@",error);
}else{
//分别获取系统x y z 加速度数据
NSLog(@"x-----------%lf",accelerometerData.acceleration.x);
NSLog(@"y-----------%lf",accelerometerData.acceleration.y);
NSLog(@"x-----------%lf",accelerometerData.acceleration.z);
}
}];
}else{
NSLog(@"你的设备不支持加速度数据");
}
获取螺旋仪数据
if (self.Manager.gyroActive) {
//设置螺旋仪数据更新频率
self.Manager.gyroUpdateInterval = 0.1;
[self.Manager startGyroUpdatesToQueue:queque withHandler:^(CMGyroData * _Nullable gyroData, NSError * _Nullable error) {
if (error) {
[self.Manager stopGyroUpdates];
}else{
NSLog(@"x-----------%lf",gyroData.rotationRate.x);
NSLog(@"y-----------%lf",gyroData.rotationRate.y);
NSLog(@"z-----------%lf",gyroData.rotationRate.z);
}
}];
}else{
NSLog(@"你的设备不支持螺旋仪数据");
}
获取磁场数据
if (self.Manager.magnetometerActive) {
//设置磁场更新频率
self.Manager.magnetometerUpdateInterval = 0.1;
[self.Manager startMagnetometerUpdatesToQueue:queque withHandler:^(CMMagnetometerData * _Nullable magnetometerData, NSError * _Nullable error) {
if (error) {
[self.Manager stopMagnetometerUpdates];
}else{
NSLog(@"x-----------%lf",magnetometerData.magneticField.x);
NSLog(@"y-----------%lf",magnetometerData.magneticField.y);
NSLog(@"z-----------%lf",magnetometerData.magneticField.z);
}
}];
}else{
NSLog(@"你的设备不支持磁场数据");
}
主动请求获取加速度数据，陀螺仪数据，磁场数据
主动请求加速度数据
if (self.Manager.accelerometerAvailable) {
CMAccelerometerData *AccelerometerData = self.Manager.accelerometerData;
NSLog(@"x-----------%lf",AccelerometerData.acceleration.x);
}
主动请求陀螺仪数据
if (self.Manager.gyroAvailable) {
CMGyroData *gyroData = self.Manager.gyroData;
NSLog(@"x-----------%lf",gyroData.rotationRate.x);
}
主动请求磁场数据
if (self.Manager.magnetometerAvailable) {
CMMagnetometerData *magnetometerData = self.Manager.magnetometerData;
NSLog(@"x-----------%lf",magnetometerData.magneticField.x);
}
感知设备移动
// 如果可以获取设备的动作信息
if (self.Manager.deviceMotionAvailable) {
//开始更新设备的动作信息
[self.Manager startDeviceMotionUpdates];
}else{
NSLog(@"该设备deviceMotion不可用");
}
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(Update) userInfo:nil repeats:YES];
}
-(void)Update{
if (self.Manager.deviceMotionAvailable) {
CMDeviceMotion *deviceMotion = self.Manager.deviceMotion;
NSLog(@"手机顶部转过的夹角（Z轴倾斜）：%lf",deviceMotion.attitude.yaw);
NSLog(@"手机顶部或尾部翘起角度（X轴倾斜）：%lf",deviceMotion.attitude.pitch);
NSLog(@"手机左右侧翘起角度：（Y轴倾斜）%lf",deviceMotion.attitude.roll);
//陀螺仪信息
NSLog(@"%lf",deviceMotion.rotationRate.x);
NSLog(@"%lf",deviceMotion.rotationRate.y);
NSLog(@"%lf",deviceMotion.rotationRate.z);
//重力加速度
NSLog(@"%lf",deviceMotion.gravity.x);
NSLog(@"%lf",deviceMotion.gravity.y);
NSLog(@"%lf",deviceMotion.gravity.z);
//磁场信息（精度）
NSLog(@"%d",deviceMotion.magneticField.accuracy);
//xyz磁场强度
NSLog(@"%lf",deviceMotion.magneticField.field.x);
NSLog(@"%lf",deviceMotion.magneticField.field.y);
NSLog(@"%lf",deviceMotion.magneticField.field.z);
}
计步器
@property(nonatomic,strong)CMStepCounter *stepCounter;
//计步器
if ([CMStepCounter isStepCountingAvailable]) {
self.stepCounter = [[CMStepCounter alloc]init];
NSOperationQueue *queue1 = [[NSOperationQueue alloc]init];
//updateOn :每5步执行一次代码块
[self.stepCounter startStepCountingUpdatesToQueue:queue1 updateOn:5 withHandler:^(NSInteger numberOfSteps, NSDate * _Nonnull timestamp, NSError * _Nullable error) {
NSLog(@"行走了%ld",numberOfSteps);
}];
}else{
NSLog(@"计步器不可用");
}
设备状态
#import
// CMMotionActivityManager
//手机，存储用户的存储运动数据，反应步行，跑步，驾驶车辆或处于静止状态
NSOperationQueue *queue2= [[NSOperationQueue alloc]init];
[self.motionActivityManager startActivityUpdatesToQueue:queue2 withHandler:^(CMMotionActivity * _Nullable activity) {
NSLog(@"走路：%d",activity.walking);
NSLog(@"跑步：%d",activity.running);
NSLog(@"驾车：%d",activity.automotive);
NSLog(@"静止：%d",activity.stationary);
NSLog(@"未知：%d",activity.unknown);
}];