删除IOS

Question

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

所以只需使用快捷文件，我得到使用function.And它正确返回，现在我的名，我怎么能删除使用雨燕3这个文件？ 和我怎样才能读取像UIImageJPEGRepresentation？

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

我没有跟踪和它不工作

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

文件管理器= FileManager.default VAR文件路径=文件名 //检查文件是否存在

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

我像这样保存文件

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

但我不能从下面

Answer 1

提供的答案删除有删除文件的行：

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

而这里的代码，将其设置为ImageView的：

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

Answer 2

试试这个。希望这将work.To 删除文件

let fileNameToDelete = "myFileName.txt" 
    var filePath = "" 

    // Fine documents directory on device 
    let dirs : [String] = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.allDomainsMask, true) 

    if dirs.count > 0 { 
     let dir = dirs[0] //documents directory 
     filePath = dir.appendingFormat("/" + fileNameToDelete) 
     print("Local path = \(filePath)") 

    } else { 
     print("Could not find local directory to store file") 
     return 
    } 


    do { 
     let fileManager = FileManager.default 

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

    } 
    catch let error as NSError { 
     print("An error took place: \(error)") 
    } 

来源：http://swiftdeveloperblog.com/code-examples/delete-file-example-in-swift/

对于图像加载：

let imageData = UIImageJPEGRepresentation(image)! 
let docDir = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true) 
let imageURL = docDir.appendingPathComponent("tmp.jpeg") 
try! imageData.write(to: imageURL) 

let newImage = UIImage(contentsOfFile: imageURL.path)!