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
如何使用这种CSV文件中的数据?还是我该如何打印"inside"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?
我将我从excel文件中获得的这种文件转换为Numbers,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.
原始CSV文件以数字形式打开:
The original CSV file opened in numbers:
我得到的控制台输出:
使用此方法:
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: "\r", with: "\n")
cleanFile = cleanFile.replacingOccurrences(of: "\n\n", with: "\n")
// cleanFile = cleanFile.replacingOccurrences(of: ";;", with: "")
// cleanFile = cleanFile.replacingOccurrences(of: ";\n", with: "")
return cleanFile
}
解决方案,感谢Jens Meder
SOLUTION thanks to Jens Meder
使用
func csv(data: String) -> [[String]] {
var result: [[String]] = []
let rows = data.components(separatedBy: "\n")
for row in rows {
let columns = row.components(separatedBy: ";")
result.append(columns)
}
return result
}
在viewDidLoad
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
您要做的是将字符串分成几行,然后分成几列(基本上是二维的字符串数组). Swift已经为String
结构上的方法提供了 components
方法.
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: "\n")
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.
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