小编Diw*_*ddy的帖子

我想实现这种类型的动画。请检查此 URL

https://www.dropbox.com/s/gz9vfy5refsh7a5/Screen.mov?dl=0

我正在添加我在项目中使用的代码，在该项目中我使用 Core Graphics 渲染带有动画的文本，但我无法为上述链接中显示的文本设置动画

这是我用来在屏幕上呈现文本的代码

    let context = UIGraphicsGetCurrentContext()!
    context.saveGState()
    context.setAlpha(noLightText)

    let nOLIGHTRect = CGRect(x: 145.66, y: 590, width: 449.38, height: 125)
    let nOLIGHTStyle = NSMutableParagraphStyle()
    nOLIGHTStyle.alignment = .center
    let nOLIGHTFontAttributes = [
        .font: UIFont(name: "Futura-CondensedExtraBold", size: 96)!,
        .foregroundColor: nOLIGHTColor,
        .paragraphStyle: nOLIGHTStyle,
        ] as [NSAttributedStringKey: Any]

    "NO LIGHT".draw(in: nOLIGHTRect, withAttributes: nOLIGHTFontAttributes)

    context.restoreGState()


    //// LOW LIGHT Drawing
    context.saveGState()
    context.setAlpha(_0)

    let lOWLIGHTRect = CGRect(x: 145.94, y: 590, width: 449.38, height: 125)
    let lOWLIGHTStyle = NSMutableParagraphStyle()
    lOWLIGHTStyle.alignment = .left
    let …