CALayer缩放动画的图层大小从左下角到右上角 [英] CALayer scale animation for layer size starting from bottom left to top right

问题描述

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：

Another problem with animation on a layer to make it scale and show like growing from bottom left, somewhat similar to the figure :

---------------    
|             |
|----------   |
|         |   |
|         |   |
|-----    |   |
|    |    |   |
---------------

我有尝试了一些动画但不能完全按照我想要的方式实现它。
请建议。目前使用以下代码进行扩展：

I have tried some animations but not able to achieve it exactly the way i want. Please suggest. Currently using following code to scale:

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];

推荐答案

你应该设置一个不同的anchorPoint来实现这种效果。

You should set a different anchorPoint to acheive that effect.

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

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