实用知识：陀螺仪的方法使用

#import "ViewController.h"
#import <CoreMotion/CoreMotion.h>

@interface ViewController ()

@property (strong, nonatomic) CMMotionManager *manager;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

_manager = [[CMMotionManager alloc] init];

if ([_manager isGyroAvailable] == NO) {
NSLog(@"陀螺仪不能用");
return;
}

// GRYO
// 获取陀螺仪数据的时间间隙
_manager.gyroUpdateInterval = 0.5;

// Pull 与 Push 方式
[self pushTest];
}

#pragma mark - Pull方式

- (IBAction)startBtnAction:(UIButton *)sender
{
if ([self.manager isGyroActive] == NO) {
[self.manager startGyroUpdates];
}
}

- (IBAction)pullBtnAction:(UIButton *)sender
{
CMGyroData *data = [self.manager gyroData];
CMRotationRate rate = data.rotationRate;

NSLog(@"%f, %f, %f", rate.x, rate.y, rate.z);
}

- (IBAction)stopBtnAction:(UIButton *)sender
{
if ([self.manager isGyroActive] == YES) {
[self.manager stopGyroUpdates];
}
}

#pragma mark Push方式

- (void)pushTest
{
[_manager startGyroUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMGyroData * _Nullable gyroData, NSError * _Nullable error) {

// CMRotationRate 陀螺仪数据的结构体
CMRotationRate rate = gyroData.rotationRate;
NSLog(@"%f, %f, %f", rate.x, rate.y, rate.z);
}];
}

@end