iOS中ImageView上的阴影效果 | iOS中ImageView上的阴影效果

本文介绍了iOS中ImageView上的阴影效果的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正试图为Imageview提供阴影效果，就像此图像一样.

I am trying to provide a shadow effect to my Imageview just like in this image.

但是我面临的问题是，阴影实际上是从Imageview的底部可见的.

but the problem which I am facing it is that the shadow is actually visible from the bottom of the Imageview.

这是我添加阴影的代码.颜色和所有颜色仍与此颜色不匹配.

Here is the code which I have done to add the shadow. The color and all is still not matching with this one.

          CAGradientLayer *shadow = [CAGradientLayer layer];
          shadow.frame = CGRectMake(-100, 70, perspectiveView.frame.size.width,
           perspectiveView.frame.size.height - 20);
          shadow.startPoint = CGPointMake(1.0, 0.5);
           shadow.endPoint = CGPointMake(0, 0.5);
           shadow.colors = [NSArray arrayWithObjects:(id)[[UIColor colorWithWhite:0.0
           alpha:0.4f] CGColor], (id)[[UIColor clearColor] CGColor], nil];

          shadow.opacity = 1.0f;
          [perspectiveView.layer addSublayer:shadow];

请提供输入.另外，如果方法错误，请随时指导我使用其他任何方法.预先感谢.

Please provide inputs. Also if the approach is wrong, feel free to guide me to any other approach.Thanks in advance.

还有谁能建议如何提供3D边框，就像在图像中提供较小宽度的图像一样?

Also can anyone suggest how to provide a 3D border just like in the image which provides a slight width to the image view?

推荐答案

也许在该图层上添加阴影似乎可行.您可能要尝试这样的事情:

Perhaps, adding a shadow to the layer seems to work. You may want to try something like this:

//  perspectiveView.transform = CGAffineTransformMakeRotation(-50.0f);
    perspectiveView.layer.shadowOffset = CGSizeMake(10, 10);
    perspectiveView.layer.shadowRadius = 5.0;
    perspectiveView.layer.shadowOpacity = 0.6;

    perspectiveView.layer.masksToBounds = NO;

您将需要在这些值之间进行调整以符合您的要求.希望这可以帮助.

You will need to playaround with these values to match your requirements. Hope this helps.

这是我的输出:

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