检查多维数组中的值是否等于字符串swift

I am having trouble checking a value in a mutlidimensional array.

我在检查多维数组中的值时遇到问题。

I am creating an array within an array with 3 arrays inside.

我在一个内部有3个数组的数组中创建一个数组。

The array is called profilerdata, the variable "key" is a string so it should just be three stings in these arrays.

该数组称为profilerdata，变量“key”是一个字符串，因此它应该只是这些数组中的三个字符串。

The array in my log as a SwiftDeferredNSArray which I think is the first problem as I have read this is a non mutable array.

我的日志中的数组作为SwiftDeferredNSArray，我认为是第一个问题，因为我已经读过这个是一个非可变数组。

var newKeyArray = [[key],[String](),[""]]

for thing in dataArray as! [[String: AnyObject]] {
    newKeyArray[1].append("0")
}

print(newKeyArray)
profilerData.append(newKeyArray as AnyObject)

I then try and read the value in the array like so:

然后我尝试读取数组中的值，如下所示：

var n = 1
while n <= elementArray.count {
    if profilerData[n][0] as! String == headertitle {
        print("it matches")
    } else {
        print("it does not match")
    }

    n += 1
}

The variable "headertitle" is a string too but when this runs I get an error:

变量“headertitle”也是一个字符串，但是当它运行时我得到一个错误：

Could not cast value of type 'Swift._SwiftDeferredNSArray' (0x104ce8040) to 'NSString' (0x101f97c60).

无法将'Swift._SwiftDeferredNSArray'（0x104ce8040）类型的值转换为'NSString'（0x101f97c60）。

This error is occuring on this line

此错误发生在此行上

if profilerData[n][0] as! String == headertitle {

Any help much appreciated,

任何帮助非常感谢，

p.s. Please explain quite simply as I'm new to Swift.

附：请简单解释一下，因为我是Swift的新手。

1 个解决方案

#1

Your arrays are one level deeper than you seem to think they are. To see this, try this code, which simplifies what you're doing:

你的数组比你认为的更深一级。要查看此内容，请尝试使用此代码，以简化您正在执行的操作：

let key = "key"
let newKeyArray = [[key],[String](),[""]]
var profilerData = [Any]()
profilerData.append(newKeyArray)

let oneLevel = profilerData[0] as! Array<Array<String>>
let twoLevel = oneLevel[0] // Array<String>
let threeLevel = twoLevel[0] // String