iOS在视图中添加/删除阴影 [英] iOS add / remove shadow from a view

问题描述

我不明白如何删除添加到视图中的阴影。
我以这种方式添加到 initWithFrame中的视图阴影：

I do not understand how to remove a shadow that was added to a view. I add to my view in initWithFrame a shadow in this way:

self.layer.borderWidth = 2;
self.layer.borderColor = [UIColor clearColor].CGColor;
self.backgroundColor = [UIColor greenColor];
[self.layer setCornerRadius:8.0f];
CALayer *layer = self.layer;
layer.shadowOffset = CGSizeMake(2, 2);
layer.shadowColor = [[UIColor blackColor] CGColor];
layer.cornerRadius = 8.0f;
layer.shadowRadius = 3.0f;
layer.shadowOpacity = 0.80f;
layer.shadowPath = [[UIBezierPath bezierPathWithRect:layer.bounds] CGPath];

在执行应用程序后，我想从此视图中删除阴影。我尝试过使用：

After in the execution of the app I want to remove the shadow from this view. I've tried using:

layer.hidden = YES;

或

self.layer.hidden = YES;

但这会完全隐藏视图，而不仅仅是添加的阴影。

but this hides the view completely, not just the added shadow.

有没有办法从视图中检索添加的阴影然后隐藏它？
谢谢！

Is there a way to retrieve the added shadow from a view and then hide it? Thanks!

推荐答案

我想你可以使用 shadowOpacity 你的 CALayer的财产。

所以这应该有效：

self.layer.shadowOpacity = 0.0;

参见 CALayer 's shadowOpacity 文档页面

See the CALayer's shadowOpacity documentation page

并显示您的影子使用：

self.layer.shadowOpacity = 1.0;

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