ios陀螺仪和加速计
????? ios设备中有的加速计可以测量出加速度和重力。陀螺仪可用于确定设备的方向与每条坐标轴之间的夹角，可用于读取描述设备围绕其轴的旋转的值。
添加CoreMotion.framework.
以下为例子代码：
//// ViewController.h// MotionTest// Created by Dwen on 13-2-26.// Copyright (c) 2013年 Dwen. All rights reserved.//#import <UIKit/UIKit.h>#import <CoreMotion/CoreMotion.h>@interface ViewController : UIViewController@property (strong, nonatomic) CMMotionManager *motionManager;@property (weak, nonatomic) IBOutlet UILabel *accelerometerLabel;@property (weak, nonatomic) IBOutlet UILabel *gyroscopeLabel;@end
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//// ViewController.m// MotionTest//// Created by Dwen on 13-2-26.// Copyright (c) 2013年 Dwen. All rights reserved.//#import "ViewController.h"@interface ViewController ()@end@implementation ViewController@synthesize motionManager;@synthesize accelerometerLabel;@synthesize gyroscopeLabel;- (void)viewDidLoad{ [super viewDidLoad];self.motionManager = [[CMMotionManager alloc] init]; NSOperationQueue *queue = [[NSOperationQueue alloc] init]; //加速计 if (motionManager.accelerometerAvailable) { motionManager.accelerometerUpdateInterval = 1.0/10.0; [motionManager startAccelerometerUpdatesToQueue:queue withHandler:^(CMAccelerometerData *accelerometerData,NSError *error){ NSString *labelText; if (error) { [motionManager stopAccelerometerUpdates]; labelText = [NSString stringWithFormat:@"Accelerometer encountered error: %@",error]; }else{ labelText = [NSString stringWithFormat:@"加速计\nx: %+.2f\ny: %+.2f\nz: %+.2f",accelerometerData.acceleration.x,accelerometerData.acceleration.y,accelerometerData.acceleration.z]; } [accelerometerLabel performSelectorOnMainThread:@selector(setText:) withObject:labelText waitUntilDone:NO]; }]; }else{ accelerometerLabel.text = @"This device has no accelerometer."; } //陀螺仪 if (motionManager.gyroAvailable) { motionManager.gyroUpdateInterval = 1.0/10.0; [motionManager startGyroUpdatesToQueue:queue withHandler:^(CMGyroData *gyroData,NSError *error){ NSString *labelText; if (error) { [motionManager stopGyroUpdates]; labelText = [NSString stringWithFormat:@"Gyroscope encountered error: %@",error]; }else{ labelText = [NSString stringWithFormat:@"陀螺仪\nx: %+.2f\ny: %+.2f\nz: %+.2f",gyroData.rotationRate.x,gyroData.rotationRate.y,gyroData.rotationRate.z]; } [gyroscopeLabel performSelectorOnMainThread:@selector(setText:) withObject:labelText waitUntilDone:NO]; }]; }else{ gyroscopeLabel.text = @"This device has no gyroscope"; }}- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning];}@end?