使用 Swift 在数组中搜索字符串的索引

Question

A simple question but a big problem with the Apple Watch.

I am searching the index of an element in an Array. But the code gives me nil .

override func awakeWithContext(context: AnyObject?) {
    super.awakeWithContext(context)

    let temperatur = context as! String

    let SliderData = ["off", "comfort", "eco","5.0", "5.5", "6.0", "6.5"]  

    println(toString(temperatur.dynamicType))
    println(find(SliderData, "\(temperatur)") )
}

Answer 1

The array does not contain the string contained in the variable "temperatur" which is why you are not getting an index back.

If the value is already a string then you don't need to use "\\(temperatur)" You can use this line instead:

println(find(SliderData, temperatur) )

Answer 2

您正在搜索字符串“temperatur”——这显然不在数组中——而不是变量temperatur的内容

println(find(SliderData, temperatur) )