iOS传感器（指南针、GPS、加速计、摇一摇）

一：指南针

#import <CoreLocation/CoreLocation.h>

CLLocationManager *locManger = [[CLLocationManager alloc] init];

locManger.delegate = self;

locManger.headingFilter = 0.1;// 最小变化度数

[locManger startUpdatingHeading];// 开始更新方向

// 代理方法

- (void)locationManager:(CLLocationManager*)manager didUpdateHeading:(CLHeading*)newHeading {

    if(newHeading.magneticHeading == 0) {// 0度表示北方，180度表示南方

        NSLog(@"北方");

    } else if(newHeading.magneticHeading == 180) {

    NSLog(@"南方");

}}

二：GPS

#import <CoreLocation/CoreLocation.h>

CLLocationManager *locManger = [[CLLocationManager alloc] init];

self.locationManager.delegate = self;// 设置委托

[self.locationManager setDesiredAccuracy:CLLocationDistanceMax];// 设置精度为最优

[self.locationManager setDistanceFilter:(100.0)];// 设置更新的最小距离100米

[self.locationManager startUpdatingLocation];// 开始更新位置信息

回调方法

- (void)locationManager:(CLLocationManager*)manager

didUpdateLocations:(NSArray*)locations {

CLLocation *nowLocation = [locations lastObject];// 获取当前位置

CLLocationDegrees longitutude = newLocation.coordinate.longitude;// 获取经度

CLLocationDegrees latitude = newLocation.coordinate.latitude;// 获取纬度

}

// 计算距离

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {  

double distance = [newLocation distanceFromLocation:oldLocation];   NSLog(@"distance = %lf", distance);

}

三：加速计

1.获得加速计对象

UIAccelerometer*accelerometer = [UIAccelerometersharedAccelerometer];

accelerometer.delegate=self;// 设置委托

// 设置更新间隔时间

accelerometer.updateInterval=1.0f/30.0f;

2.回调方法

- (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration {

  self.xLabel.text= [NSString stringWithFormat:@"%f",acceleration.x];// 获得x轴原始数据

  self.yLabel= [NSString stringWithFormat:@"%f",acceleration.y];// 获得y轴原始数据

  self.zLabel= [NSString stringWithFormat:@"%f",acceleration.z];// 获得z轴原始数据

}

四：摇一摇

// 在Controller中重写此方法，就可以获取摇一摇事件

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent*)event {

  if (motion == UIEventSubtypeMotionShake) {

  // 检测到了，手机摇一摇

}}