Utils.randomColor(opacity)

Creates a random color with a given opacity. The opacity is optional.
译:创建一个随机颜色与一个给定的不透明度。不透明度是可选的。

Arguments(参数)

opacity — A number between 0 and 1. (Optional) 译:介于0和1之间的数字。(可选)

layerA = new Layer
layerA.backgroundColor = Utils.randomColor(0.5)

print layerA.backgroundColor
# Output: "rgba(124, 12, 33, 0.5)"

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