ios - Swift:创建后如何访问临时目录(NSTemporaryDirectory())中的CSV文件？

Question

我正在尝试创建一个简单的应用程序，该应用程序创建 csv 文件并将其保存在临时目录中。它似乎有效，但我在哪里或如何访问该文件？

下面是我用来创建 csv 文件的示例代码:

// CSV file creating
func creatCSV() -> Void {
    let fileName = "Example.csv"
    let path = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(fileName)
    let csvText = "Time,Date,Heartrate(BPM)\n"

    do {
        try csvText.write(to: path!, atomically: true, encoding: String.Encoding.utf8)
    } catch {
        print("Failed to create file")
        print("\(error)")
    }
    print(path ?? "not found")
}

Answer 1

写入文件:

func createCSV() -> String? {
    let fileName = "Example.csv"
    let tempDir = NSTemporaryDirectory()
    let fileURL = URL(fileURLWithPath: tempDir, isDirectory: true).appendingPathComponent(fileName)

    let csvText = "Time,Date,Heartrate(BPM)\n"

    do {
        try csvText.write(to: fileURL, atomically: true, encoding: .utf8)
        return fileURL.path 
    } catch {
        print("Failed to create file: \(error)")
        return nil
    }

}

从文件中读取:

func readCSV(path:String) throws {
    let text = try String(contentsOfFile: path)
    print("I read the following from the file: \(text)")
}

同时使用的示例:

if let path = createCSV() {
    print("Path was \(path)")
    try readCSV(path: path)
}