在iOS中使用Swift删除文件 [英] delete a file using swift in ios

问题描述

func getDocumentsDirectory() -> URL {
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    let documentsDirectory = paths[0]
    return documentsDirectory
}

很简单，我使用该函数获取文件名，并且它现在可以正确返回，如何使用Swift 3删除该文件?以及如何像 UIImageJPEGRepresentation 一样读回图像?

So simply, I get my filename using that function.And it returns correctly for now, how can I delete this file using Swift 3? And How can I read the image back like UIImageJPEGRepresentation?

let image_data = UIImageJPEGRepresentation(self.commons.correctlyOrientedImage(image: self.imageSelected.image!),0.5)

我照做了，但是没用

let filename = getDocumentsDirectory().appendingPathComponent("l.png")   let

fileManager = FileManager.defaultvar filePath =文件名//检查文件是否存在

fileManager = FileManager.default var filePath = filename // Check if file exists

                if fileManager.fileExists(atPath: filePath.absoluteString) {
                    // Delete file
                    try fileManager.removeItem(atPath: filePath.absoluteString)
                } else {
                    print("File does not exist")
                }

我这样保存文件

let filename =    getDocumentsDirectory().appendingPathComponent("COPY111.PNG")
        try? image_data?.write(to: filename)

但是我无法从下面提供的答案中将其删除

But I cannot remove it from answers provided below

推荐答案

以下是用于删除文件的行:

There're lines for deleting a file:

do {
    try FileManager.default.removeItem(at: fileName)
} catch let error as NSError {
    print("Error: \(error.domain)")
}

这是将其设置为imageView的代码:

And here's code for setting it to imageView:

if let image = UIImage(contentsOfFile: fileName) {
   imageView.image = image
}

这篇关于在iOS中使用Swift删除文件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！