UIView在动画制作期间获取位置

我在Stack和其他网站上都看过了这个问题的每一个例子，但对我来说仍然不可行。我试图在动画处于会话中时获取对象的位置

以下是我所拥有的：

- (void)viewDidLoad{
    currentPosition = [[bikeMotion.layer presentationLayer] center]; //its a CGPoint
}

- (void)doAnimation {
    bikeMotion = [[DotAnimation alloc]initWithFrame:CGRectMake((*bikePathPoints)[0].x, (*bikePathPoints)[0].y, 8, 8)];

    //... [self animate stuff]...
    [NSTimer scheduledTimerWithTimeInterval:0.07f target:self selector:@selector(backgroundAnimations) userInfo:nil repeats:YES];
}

-(void)backgroundAnimations{
    cout << currentPosition.x << endl;

}

-（void）viewDidLoad{
currentPosition=[[bikmotion.layer presentationLayer]center]；//它是一个CGPoint
}
-（无效）送达{
bikMotion=[[DotAnimation alloc]initWithFrame:CGRectMake（（*bikePathPoints）[0].x，（*bikePathPoints）[0].y，8，8）]；
//…[自我动画化的东西]。。。
[NSTimer scheduledTimerWithTimeInterval:0.07f目标：自选择器：@selector（backgroundAnimations）用户信息：无重复：是]；
}
-（无效）背景动画{
您是否尝试过对象、层、锚点？您需要导入QuartzCore。
实际上，插值起到了帮助作用。
- (void)viewDidLoad{
    currentPosition = [[bikeMotion.layer presentationLayer] frame]; //its a CGRect
}

- (void)doAnimation {
    bikeMotion = [[DotAnimation alloc]initWithFrame:CGRectMake((*bikePathPoints)[0].x, (*bikePathPoints)[0].y, 8, 8)];
    //...[self animation stuff];
    [NSTimer scheduledTimerWithTimeInterval:0.07f target:self selector:@selector(backgroundAnimations) userInfo:nil repeats:YES];
}

-(void)backgroundAnimations{
    cout << currentPosition.origin.x << endl;

}

- (void)viewDidLoad{
    p = (CALayer*)[bikeMotion.layer presentationLayer];

}

-(void)doAnimation{
    bikeMotion = [[DotAnimation alloc]initWithFrame:CGRectMake((*bikePathPoints)[0].x, (*bikePathPoints)[0].y, 8, 8)];
    [NSTimer scheduledTimerWithTimeInterval:0.07f target:self selector:@selector(backgroundAnimations) userInfo:nil repeats:YES];
}

-(void)backgroundAnimations{
    CGPoint position = [p position];
    cout << position.x << endl;
}