如何从我的CATiledLayer中删除那些旋转错误？ [英] How do I remove those rotation artefacts from my CATiledLayer?

问题描述

我有一个CATiledLayer，在其中以以下方法呈现内容

I have a CATiledLayer into which I render content in the following method

- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx

我使用QuartzDemo代码来绘制模式。这个工作得很好，直到我对图层的parentLayer（一个UIView）应用旋转变换：

I used the QuartzDemo code to draw a pattern. This works very well until I apply a rotation transform to the layer's parentLayer (a UIView):

旋转：

当我开始在CATiledLayer中绘制线条和文本时，这些锯齿形错误会变得更糟。

These zigzag artefacts become worse when I start drawing lines and texts into the CATiledLayer.

我应用了转换如下（我也试图对视图本身使用仿射变换）：

I applied the transform as follows (I also tried using an affine transform on the view itself):

self.containerView.layer.transform = CATransform3DMakeRotation(angleRadians, 0.0f, 0.0f, 1.0f);

我转换containerView而不是图层本身，因为我有几个视图层，

I transform the containerView rather than the layer itself, as I have several layers in that view that I would like to rotate at the same time without changing the relative positions.

在过去旋转UIImageView时没有问题。

I did not have problems when rotating UIImageViews in the past.

有没有办法，我可以旋转CATiledLayer没有这些问题？

Is there a way that I can rotate the CATiledLayer without these problems?

任何帮助将非常感激。

您的，

Felix

推荐答案

只有解决这个问题的方法，我发现这是：

The only way of fixing this issue I found was this:

1. 将图层绘制到位图上下文


2. 将该上下文的CGImageRef设置为图层内容

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