swift 3.1 如何从 CSV 获取数组或字典 [英] swift 3.1 how to get array or dictionary from CSV

问题描述

我如何使用这种 CSV 文件中的数据?或者我如何打印例如内部"列的第 2 行值并将其分配给属性/实体?

How could I use data in this kind of CSV file? Or how could I print for example row 2 value for "inside" column and assign it to a property / entity?

我有一种从 excel 文件中得到的转换为 Numbers 的文件，我想获取每一列的数据并使用它们.

I have this kind of file I got from excel file converted to Numbers, I'd like to grab data for each column and use them.

以数字打开的原始 CSV 文件:

The original CSV file opened in numbers:

我得到的控制台输出:

使用这种方法:

func readDataFromCSV(fileName:String, fileType: String)-> String!{
        guard let filepath = Bundle.main.path(forResource: fileName, ofType: fileType)
            else {
                return nil
        }
        do {
            var contents = try String(contentsOfFile: filepath, encoding: .utf8)
            contents = cleanRows(file: contents)
            return contents
        } catch {
            print("File Read Error for file (filepath)")
            return nil
        }
    }


func cleanRows(file:String)->String{
    var cleanFile = file
    cleanFile = cleanFile.replacingOccurrences(of: "
", with: "
")
    cleanFile = cleanFile.replacingOccurrences(of: "

", with: "
")
    //        cleanFile = cleanFile.replacingOccurrences(of: ";;", with: "")
    //        cleanFile = cleanFile.replacingOccurrences(of: ";
", with: "")
    return cleanFile
}

感谢 Jens Meder 的解决方案

SOLUTION thanks to Jens Meder

使用

 func csv(data: String) -> [[String]] {
        var result: [[String]] = []
        let rows = data.components(separatedBy: "
")
        for row in rows {
            let columns = row.components(separatedBy: ";")
            result.append(columns)
        }
        return result
    }

在视图中DidLoad

in viewDidLoad

var data = readDataFromCSV(fileName: kCSVFileName, fileType: kCSVFileExtension)
    data = cleanRows(file: data!)
    let csvRows = csv(data: data!)
    print(csvRows[1][1]) // UXM n. 166/167

推荐答案

您想要做的是将字符串拆分成行，然后拆分成列(基本上是一个二维的字符串数组).Swift 已经为此提供了 components 方法在 String 结构上.

What you want to do is splitting up the string in rows and then into columns (basically a two dimensional array of Strings). Swift already provides the components method for that on String structs.

func csv(data: String) -> [[String]] {
    var result: [[String]] = []
    let rows = data.components(separatedBy: "
")
    for row in rows {
        let columns = row.components(separatedBy: ";")
        result.append(columns)
    }
    return result
}

然后您可以通过以下方式访问任何值:

Then you can access any value via:

var data = readDataFromCSV(fileName: kCSVFileName, fileType: kCSVFileExtension)
data = cleanRows(file: data)
let csvRows = csv(data: data)
print(csvRows[1][1]) //UXM n. 166/167.

这篇关于swift 3.1 如何从 CSV 获取数组或字典的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！