Add shadow to UIView on all sides in Swift 4

总结，iOS中的圆角和阴影处理是通过`CALayer`属性实现的，通过设置`cornerRadius`、`shadow*`属性，以及优化策略，可以创建出美观且性能良好的界面效果。实践 ...

You can use a layer's shadow path to create special effects such as simulating the shadows available in Pages. The following code shows the code required to add ...

The blur radius (in points) used to render the layer's shadow. Animatable.

layer.shadowOpacity 控制陰影的不透明度，範圍0 ~ 1，數字愈大愈清楚。layer.shadowOffset 設定陰影的偏移量，第一個數字是寬度，第二個數字是高度，{5, 5} 將 ...

可從User Defined Runtime Attributes 設定三種常見的陰影效果，layer.shadowOpacity，layer.shadowOffset 和layer.shadowRadius。

I have created a custom UIView in my iOS project that has a drop shadow. My aim is to apply the same gradient to the shadow as it is on the view's background.

I am trying to add a drop shadow to views that are layered on top of one another, the views collapse allowing content in other views to be seen.

iOS can dynamically generate shadows for any UIView, and these shadows automatically adjust to fit the shape of the item in question.

In this article we're going to look at some of the various effects you can create using shadows, all by manipulating the layer properties.

若要改动阴影的表现，你可以使用CALayer的另外三个属性： shadowColor ， shadowOffset 和 shadowRadius 。 显而易见， shadowColor 属性控制着阴影的颜色，和 borderColor 和 ...