iphone中加速器,陀螺仪,磁力计的使用和实现
#import "RootViewController.h"
#import
@interface RootViewController ()
{
CMMotionManager *motionManager;
UIImageView* imageView;
}
@end
@implementation RootViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"33.jpeg"]];
imageView.backgroundColor=[UIColor redColor];
imageView.frame = CGRectMake(0, 0, 50, 50);
imageView.center = self.view.center;
[self.view addSubview:imageView];
//Core Motion的使用就是一三部曲：初始化，获取数据，处理后事。
//可以参考资料:http://www.kunli.info/2010/07/30/motion/
//在初始化阶段，不管你要获取的是什么数据，首先需要做的就是
motionManager = [[CMMotionManager alloc] init];
//所有的操作都会由这个manager接管。后面的初始化操作相当直观，以加速度的pull方式为例
[motionManager startAccelerometerUpdates]; // 开始更新，后台线程开始运行。这是pull方式。
if (!motionManager.accelerometerAvailable ) {
// fail code // 检查传感器到底在设备上是否可用
NSLog(@"传感器不可用");
}else{
motionManager.accelerometerUpdateInterval = 1/60.0; // 告诉manager，更新频率
//如果是push方式，更新的代码可以写成这样
[motionManager startAccelerometerUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMAccelerometerData *latestAcc, NSError *error)
{
NSLog(@"执行block方法");
CMAccelerometerData *data = latestAcc;//motionManager.accelerometerData;
NSNumber *x = [NSNumber numberWithDouble:data.acceleration.x];
NSNumber *y = [NSNumber numberWithDouble:data.acceleration.y];
NSNumber *z = [NSNumber numberWithDouble:data.acceleration.z];
NSLog(@"x=%@------y=%@--------z=%@",x,y,z);
if (data.acceleration.x > 0) {
imageView.center = CGPointMake(imageView.center.x + 1, imageView.center.y);//向右
}
if(data.acceleration.x < 0){
imageView.center = CGPointMake(imageView.center.x - 1, imageView.center.y);//向左
}
if (data.acceleration.y > 0){
imageView.center = CGPointMake(imageView.center.x , imageView.center.y - 1);//向上
}
if (data.acceleration.y < 0){
imageView.center = CGPointMake(imageView.center.x , imageView.center.y + 1);//向下
}
NSLog(@"*****************************");
}];
}
UIButton *button=[UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame=CGRectMake(60, 50, 150, 30);
[button setTitle:@"停止" forState:UIControlStateNormal];
[button addTarget:self action:@selector(didstop) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
UIButton *button1=[UIButton buttonWithType:UIButtonTypeRoundedRect];
button1.frame=CGRectMake(60, 450, 150, 30);
[button1 setTitle:@"获取" forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(didlook) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button1];
}
-(void)didlook
{
//要数据
CMAccelerometerData *data = motionManager.accelerometerData;
NSNumber *x = [NSNumber numberWithDouble:data.acceleration.x];
NSNumber *y = [NSNumber numberWithDouble:data.acceleration.y];
NSNumber *z = [NSNumber numberWithDouble:data.acceleration.z];
NSLog(@"x=%@------y=%@--------z=%@",x,y,z);
}
-(void)didstop
{
//最后是处理后事，就是在你不需要Core Motion进行处理的时候，释放资源
[motionManager stopAccelerometerUpdates];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end