快速重构协助

Question

我在由十个片段组成的 Storyboard 上布置了一个仪表。在原始段的顶部还有另外十个段，这些段被着色以模拟发光的段 - 这些是 socket 。 (见下图。)目前我正在使用 switch 语句根据不断变化的输入级别隐藏和取消隐藏每个导出/段。但是，正如您在下面的代码中看到的那样，它并不漂亮。我一直在阅读多态性通常是改进 switch 语句的方法，但我看不出这对这里有什么帮助。

switch input {
case 0...9:
  seg1.hidden = false
  seg2.hidden = true
  seg3.hidden = true
  seg4.hidden = true
  seg5.hidden = true
  seg6.hidden = true
  seg7.hidden = true
  seg8.hidden = true
  seg9.hidden = true
  seg10.hidden = true
case 10...19:
  seg1.hidden = false
  seg2.hidden = false
  seg3.hidden = true
  seg4.hidden = true
  seg5.hidden = true
  seg6.hidden = true
  seg7.hidden = true
  seg8.hidden = true
  seg9.hidden = true
  seg10.hidden = true
  ...
  and on and on for eight more levels.

Answer 1

//You can have these segments in an array like this-

let segments = [seg1, seg2, seg3, seg4, seg5,seg6, seg7, seg8, seg9, seg10]

// Function that will setup the segments based on input

func setUpSegmentsForInputValue(segments:[UIView], value:Int) {
    for (index, segment) in segments.enumerate() {
        segment.hidden = (value/10)  != index
    }
}

// Call the function with whatever input values 
setUpSegmentsForInputValue(segments: segments, value: someValue)