Xcode Storyboard Preview 不显示由代码添加的背景颜色

Question

I changed the background color of View to a dark grey color in ViewController.swift and this shows up in the simulator but in the storyboard the View has a white background. Is there a way to refresh/force the storyboard to show the right background color.

self.view.backgroundColor = UIColor(red:84.0/255.0, green:84.0/255.0, blue:84.0/255.0, alpha:1.0)

Answer 1

xcode 故事板预览并不能准确显示应用程序中将运行的内容，因此不幸的是，您的情况没有办法但是如果您想查看，您只需要更改故事板中的颜色或忽略它，因为代码将起作用

Answer 2

If you want to have black for example instead of white in the storyboard, you can do something like this:

1.Create class ColorBlockView that will be @IBDesignable

@IBDesignable class ColorBlockView: UIView {
    @IBInspectable var blockColor: UIColor = UIColor.black {
        didSet{
            backgroundColor = blockColor
        }
    }
}

2. Then in Identity inspector choose ColorBlockView for the view that you want to change the background color

3. Choose whatever color you want to have as a background

4. If it didn't show the color, Editor -> Refresh All Views