加速度计 - 涉及的步骤
步骤 1 - 创建一个简单的 View based application.
步骤 2 - 在中添加三个标签 ViewController.xib 并创建 ibOutlets，将它们命名为 xlabel、ylabel 和 zlabel。
步骤 3 - 更新 ViewController.h 如下 -
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UIAccelerometerDelegate> {
IBOutlet UILabel *xlabel;
IBOutlet UILabel *ylabel;
IBOutlet UILabel *zlabel;
}
@end
步骤 4 − 更新 ViewController.m 如下 -
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[[UIAccelerometer sharedAccelerometer]setDelegate:self];
//Do any additional setup after loading the view,typically from a nib
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:
(UIAcceleration *)acceleration {
[xlabel setText:[NSString stringWithFormat:@"%f",acceleration.x]];
[ylabel setText:[NSString stringWithFormat:@"%f",acceleration.y]];
[zlabel setText:[NSString stringWithFormat:@"%f",acceleration.z]];
}
@end
