简单的快速数组追加不起作用 [英] Simple swift array append not working

问题描述

我知道这将是超级基础，但是我有这段代码:

I know this is going to be super elementary, but I have this piece of code:

var labels: [String]?

func initVC(image: Images){
    self.image = image

    let tempLabels = image.label?.allObjects as! [Labels]
    for i in 0..<tempLabels.count{
        labels?.append(tempLabels[i].label!)
    }

}

标签在公共范围内，因此该函数应该可以访问它，但是当循环运行时，标签仍然为零，没有任何元素.

labels is in the public scope, so the function should have access to it, but when the loop runs through, labels is still nil with no elements.

当我在调试过程中进行调试时，tempLabels就像我期望的那样包含2个字符串元素.

When I po during debugging, tempLabels is as I expect it to be with 2 string elements.

我很确定这是一个非常简单的问题，但是我想我现在还没有解决.

I'm pretty sure this is a very simple problem, but I guess I'm just out of it right now.

推荐答案

标签从未初始化.更改

var labels:[String]?

到

var labels:[String] = []

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