Question

I've some irregular huge amount of data in a text file, and by some crucial logics I've made it just like the way I needs. Now on every time the app loads the whole process if could be performed will cost deficiency up to remarkable extent. So what should I do in order to store this regular data for one permanent time, so then through that I should retrieve when and where I got need of it? Data is an unmodifiable pure in text format.

Answer 1

好的，你的问题非常模糊，但为了让你先行一步，你可以将数据保存到文件中，然后从中读取：

let file = "file.txt" //this is the file we will write to and read from it

let text = "some text" //your data/text

if let dir : NSString = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true).first {
    let path = dir.stringByAppendingPathComponent(file);

    //writing
    do {
        try text.writeToFile(path, atomically: false, encoding: NSUTF8StringEncoding)
    }
    catch {
        /* error handling here */
    }

    //reading
    do {
        let textOut = try NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding)
        //use textOut - your content
    }
    catch {
        /* error handling here */
    }
}

How to write data to a file in the projects directory?

1 个答案: