Question

我使用CABasicAnimation更改bounds属性，然后使用它来更改图层的position属性。可能同时做两件事吗？有点像改变UIView？

的框架

CGRect oldBounds = mask.bounds;
CGRect newBounds = CGRectMake(0,0, rect.size.width * scale, rect.size.height * scale);
NSLog(@"%@", NSStringFromCGRect(newBounds));
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"bounds"];

animation.fromValue = [NSValue valueWithCGRect:oldBounds];
animation.toValue = [NSValue valueWithCGRect:newBounds];

mask.bounds = newBounds;
[mask addAnimation:animation forKey:@"bounds"];



CGPoint oldPos = mask.position;
CGPoint newPos = CGPointMake(rect.origin.x * scale, rect.origin.y * scale);

CABasicAnimation *animation2 = [CABasicAnimation animationWithKeyPath:@"position"];

animation2.fromValue = [NSValue valueWithCGPoint:oldPos];
animation2.toValue = [NSValue valueWithCGPoint:newPos];

mask.position = newPos;
[mask addAnimation:animation2 forKey:@"position"];

Answer 1

编辑：改为提供更正确的动画......

您可以一次添加2个动画......

像这样：

CALayer * myLayer ;

{
    CABasicAnimation * anim = [ CABasicAnimation animationWithKeyPath:@"position" ] ;
    anim.fromValue = [ NSValue valueWithCGPoint:layer.position ] ;
    [ layer addAnimation:anim forKey:nil ] ;
}

layer.position = <#newPosition#> ;

{
    CABasicAnimation * anim = [ CABasicAnimation animationWithKeyPath:@"bounds" ] ;
    anim.fromValue = [ NSValue valueWithCGRect:layer.bounds ] ;
    [ layer addAnimation:anim forKey:nil ] ;
}

layer.bounds = <#newBounds#> ;

同时缩放和移动图层

1 个答案: