Question

图层上的动画使其缩放并显示为从左下方增长的另一个问题，有点类似于图：

---------------    
|             |
|----------   |
|         |   |
|         |   |
|-----    |   |
|    |    |   |
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我尝试了一些动画，但却无法按照我想要的方式实现。请建议。目前使用以下代码进行扩展：

layer.anchorPoint = CGPointMake(1, 1);
CABasicAnimation *scale = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
[scale setFromValue:[NSNumber numberWithFloat:0.0f]];
[scale setToValue:[NSNumber numberWithFloat:1.0f]];
[scale setDuration:1.0f];
[scale setRemovedOnCompletion:NO];
[scale setFillMode:kCAFillModeForwards];

Answer 1

您应该设置一个不同的anchorPoint来实现这种效果。

    layer.anchorPoint = CGPointMake(0.0f, 1.0f);

Answer 2

所有这一切对我都不起作用。修复框架和点的方法

- (CGRect) fixRect:(CGRect)rect inRect:(CGRect)container
{
    CGRect frame = rect;
    frame.origin.y = container.size.height - frame.origin.y - frame.size.height;
    return frame;
}
- (CGPoint) fixPoint:(CGPoint)point fromPoint:(CGSize)containerSize
{
    CGPoint frame = point;
    frame.y = size.height - frame.y;
    return frame;
}

Answer 3

我希望这可以帮到你：

let frame = pathView.frame
let anchorPoint = CGPointMake(0, 1) //Set the animation direction
let position = CGPointMake(frame.origin.x + anchorPoint.x * frame.size.width, frame.origin.y + anchorPoint.y * frame.size.height)
pathView.layer.anchorPoint = anchorPoint
pathView.layer.position = position
UIView.animateWithDuration(0.8){ () -> Void in
    pathView.layer.transform = CATransform3DMakeScale(0.5, 0.5, 1)
}

CALayer缩放动画的图层大小从左下角到右上角

3 个答案: