#pragma mark -
#pragma mark - 加速器代理方法
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
float xx = -[acceleration x];
float yy = [acceleration y];
float angle = atan2(yy, xx);
[arrow setTransform:CGAffineTransformMakeRotation(angle)];
NSLog(@"加速器");
}
- (void) viewDidLoad
{
self.navigationController.navigationBar.tintColor = COOKBOOK_PURPLE_COLOR;
//拿到加速器,设置代理
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
}