如何在iPhone中删除阴影 [英] How can I remove a shadow in iPhone
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问题描述
我使用标准的方式从一个按钮编程阴影,但我想阴影不再存在,当我完成了按钮。我可以设置不透明度为0,但是阴影仍然存在,如果是这样,它仍然税系统。感谢
这会产生错误
tempButton.superview.layer。 shadowOffset = nil;
tempButton.superview.layer.shadowRadius = nil;
tempButton.superview.layer.shadowOpacity = nil;
解决方案
我通常执行以下操作以确保安全。 p>
[[tempButton layer] setShadowOpacity:0.0];
[[tempButton layer] setShadowRadius:0.0];
[[tempButton layer] setShadowColor:nil];
Quartz是高度优化的,不会浪费任何时间渲染,如果不必。 p>
I am using the standard way of making shadows from a button programmatically, but I would like to shadow to no longer exist after I am done with the button. I could set opacity to 0, but would the shadow still exist and if so would it still tax the system. thanks
this gives an error
tempButton.superview.layer.shadowOffset = nil;
tempButton.superview.layer.shadowRadius = nil;
tempButton.superview.layer.shadowOpacity = nil;
解决方案
I usually do the following to be safe.
[[tempButton layer] setShadowOpacity:0.0];
[[tempButton layer] setShadowRadius:0.0];
[[tempButton layer] setShadowColor:nil];
Quartz is highly optimized and will not waste any time rendering if it doesn't have to.
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