HIE大家好,这里是我的代码:帧动画减少
- (void)viewDidLoad {
[[UIAccelerometer sharedAccelerometer] setUpdateInterval:1.0/60.0];
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
[super viewDidLoad];
}
-(void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
valueX = acceleration.x *20.0;
valueY = acceleration.y *-20.0;
int newX = (int)(imageView.center.x+valueX);
int newY = (int)(imageView.center.y+valueY);
CGPoint newCenter = CGPointMake(newX,newY);
imageView.center=newCenter;
UIImageView* imageView2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"ball.png"]];
imageView2.frame = CGRectMake(newX-12, newY-12, 24, 24);
[self.view addSubview:imageView2];
[UIView beginAnimations:nil context:imageView2];
[UIView setAnimationDuration:10.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
imageView2.frame = CGRectMake(newX-2, newY-2, 4, 4);
[imageView2 setAlpha:0.0];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(removeSmoke:finished:context:)];
[UIView commitAnimations];
if(imageView2.alpha=0){
[imageView2 removeFromSuperview];
}
[self.view bringSubviewToFront:imageView];
}
起初,我的动画是非常光滑,1.0/60.0,但几秒钟后,动画的错误和不顺利,我认为它成为1.0/5.0。我不知道为什么。我该如何解决这个问题?对不起我的英语我是法国人:/