ios - 将 MarqueeLabel 转换为 Swift 1.2 语法时枚举错误

Question

我想在用 Swift 1.2 编写的应用程序中向标签添加选取框效果。我找到了这个库MarqueeLabel Swift但这是在 Swift 2 中。我转换了几乎所有错误，除了一个。

现在显示的唯一错误是:

'[(layer: CALayer, anim: CAKeyframeAnimation)]' does not have a member named 'enumerate'

显示代码的错误是:

// Call scroller
    var scrolls = scroller(interval: interval, delay: delay)
    // Perform all animations in scrolls
    for (index, scroll) in scrolls.enumerate() {
        let layer = scroll.layer
        let anim = scroll.anim

        // Add callback to single animation
        if index == 0 {
            anim.setValue(completion as AnyObject, forKey: MarqueeKeys.CompletionClosure.rawValue)
            anim.delegate = self
        }

        // Add animation
        layer.addAnimation(anim, forKey: "position")
    }

请帮我改正。

提前致谢。

Answer 1

Swift 1.2 使用以下语法:

for (index, scroll) in enumerate(scrolls) {