我有一个CAShapeLayer，我用它在条形图中绘制小点。问题是它们在视网膜显示器上都太大了。我已设置contentsScale并检查它是否已设置。我仍然看不出有没有它有什么区别!CAShapeLayer*lineShapeLayer=[CAShapeLayerlayer];lineShapeLayer.contentsScale=[[UIScreenmainScreen]scale];CGMutablePathRefpath=CGPathCreateMutable();lineShapeLayer.backgroundColor=[UIColorclearColor].CGColo

在documentationApple声明在以下情况下您需要考虑层的比例因子:CreatesadditionalCoreAnimationlayerswithdifferentscalefactorsandcompositesthemintoitsowncontentSetsthecontentspropertyofaCoreAnimationlayerdirectly最后一句话我不是很清楚。他们还说:ApplicationsthatuseCoreAnimationlayersdirectlytoprovidecontentmayneedtoadjusttheirdrawingcode