字符串插值误差

Question

我已经定义一个变量：

var photosArray: [String: [String]] = [:] 

然后，我遍历NSDictionary中，我得到这些值：

let recipenameString = recipename as! String 
let indexString = index as! String 
let leftsideString = leftside as! String 
let rightsideString = rightside as! String 

现在的问题是：

var firstString = "\(recipenameString) \(indexString)" 
let secondString = ["\(leftsideString)", "\(rightsideString)"] 
photosArray[firstString : secondString] 

我得到这个编译器错误，无法弄清楚字符串插值有什么问题：

Cannot subscript a value of type '[String : [String]]' with an index of type '(firstString: [String])' 

任何想法？ 谢谢。

Answer 1

你有一个字典，而是把它当作一个数组： 试试这个：

var firstString = recipenameString + indexString 
var stringArray = [leftSideString, rightSideString] 

photosArray[firstString] = stringArray 

这应该这样做

，这将有助于太： https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html