斯威夫特：如何从UIImage的数组提取图像文件名 [英] Swift: How to extract image filename from an array of UIImage

问题描述

如果我有UIImage的数组，像这样：

If I have an array of UIImage like so:

newImageArray = [UIImage(named:"Red.png")!,
        UIImage(named:"Green.png")!,
        UIImage(named:"Blue.png")!, UIImage(named:"Yellow.png")!]

我怎样才能提取或确定某一指数以后的图像的文件名？例如：

How can I extract or determine the filename of an image of a certain index later on? For example:

println("The first image is \(newImageArray[0])")

而不是返回可读的文件名，则返回：

Instead of returning a readable filename, it returns:

The first image is <UIImage: 0x7fe211d2b1a0>

我可以转换这个输出成可读的文本，或者是有距离的UIImage数组？

Can I convert this output into readable text, or is there a different method of extracting filenames from UIImage arrays?

推荐答案

我有环顾四周，因为这在过去一直是个问题，我也。的UIImage不存储图像的文件名。我所做的，解决这个问题是不是图像阵列我用一本字典的键名和值作为图像。在我的for循环我摘录了每个项目的键和值到一个数组和对待他们。

I have had a look around as this has been a problem for me in the past also. UIImage does not store the filename of the image. What I did to solve the issue was instead of an image array I used a dictionary with the key as the filename and the value as the Image. In my for loop I extracted the key and value of each item into a tuple and dealt with them.

我不再有code，但作为一个快速模仿了什么，我没看到下面，（我希望这符合您的要求，因为我知道每个应用程序是不同的）

I no longer have the code but as a quick mock up of what I did see below, (I hope this fits your requirements as I know every application is different)

var imageDictionary = ["image1.png": UIImage(named: "image1.png"),
     "image2.png": UIImage(named: "image2.png")]

，然后循环将看起来像：

and then the for loop will look like:

for (key, value) in imageDictionary {
    println(key) // Deal with Key
    println(value) // Deal with Value
}

......按我说的这个工作对我来说，我需要它的情况下，我希望你也可以用它！

...as I say this worked for me and the scenario I needed it for, I hope you can use it also!

祝你好运！

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