EXIF数据读写 [英] EXIF data read and write

问题描述

我搜索了从图片文件中获取EXIF数据，然后将其写回Swift.但是我只能找到针对不同语言的预定义库.

I searched for getting the EXIF data from picture files and write them back for Swift. But I only could find predefied libs for different languages.

我还找到了对"CFDictionaryGetValue"的引用，但是我需要哪些键来获取数据?我该怎么写呢?

I also found references to "CFDictionaryGetValue", but which keys do I need to get the data? And how can I write it back?

推荐答案

我正在使用它从图像文件中获取 EXIF信息:

I'm using this to get EXIF infos from an image file:

import ImageIO

let fileURL = theURLToTheImageFile
if let imageSource = CGImageSourceCreateWithURL(fileURL as CFURL, nil) {
    let imageProperties = CGImageSourceCopyPropertiesAtIndex(imageSource, 0, nil)
    if let dict = imageProperties as? [String: Any] {
        print(dict)
    }
}

它为您提供了一个字典，其中包含各种信息，例如颜色配置文件-EXIF信息特别位于dict["{Exif}"]中.

It gives you a dictionary containing various informations like the color profile - the EXIF info specifically is in dict["{Exif}"].

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