如何从 Swift 中的备份中排除文件?
How to exclude file from backup in Swift?
我使用 Swift 1.2 时效果很好,因为我将 filePath 用作字符串。现在 Swift 2 希望我们所有人都使用 URL 路径,即使我正在阅读他们的文档,我也无法让它工作。
我有;
var fileName = "myRespondusCSV.csv"
let fileManager = NSFileManager.defaultManager()
let documentsURL = fileManager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask)
if let documentPath: NSURL = documentsURL.first as NSURL! {
filePath = documentPath.URLByAppendingPathComponent(fileName)
print(filePath)
} else {
fileManager.createFileAtPath(filePath!.path!,
contents: ("" as String).dataUsingEncoding(NSUTF8StringEncoding)!,
attributes:nil)
print("file has been created")
}
}
func excludeFileFromBackup() {
var error:NSError?
//var fileToExcludeh = NSURL.fileReferenceURL(filePath!)
var fileToExcludeh = fileURLWithPath(filePath)
let success = fileToExcludeh.setResourceValue(true, forKey: NSURLIsExcludedFromBackupKey, error: &error)
}
我收到“使用未解析的标识符 'fileURLWithPath'!
我应该使用绝对 URL 路径吗?
这应该有效
do {
try filePath.setResourceValue(true, forKey: NSURLIsExcludedFromBackupKey)
} catch _{
print("Failed")
}
Swift4如果有人需要的话:
var resourceValues = URLResourceValues()
resourceValues.isExcludedFromBackup = true
try? fileUrl.setResourceValues(resourceValues)
这适用于 Swift 3。
URL 必须是 var
.
let urls:[URL] = FileManager.default.urls(for:FileManager.SearchPathDirectory.documentDirectory, in:FileManager.SearchPathDomainMask.userDomainMask)
let appDirectory:URL = urls.last!
var fileUrl:URL = appDirectory.appendingPathComponent("myFile")
var resourceValues:URLResourceValues = URLResourceValues()
resourceValues.isExcludedFromBackup = true
do
{
try fileUrl.setResourceValues(resourceValues)
}
catch let error
{
print(error.localizedDescription)
}
这是我在 Swift 3
上的解决方案
func addSkipBackupAttributeToItemAtURL(URL:NSURL) -> Bool {
var success: Bool
do {
try URL.setResourceValue(true, forKey:URLResourceKey.isExcludedFromBackupKey)
success = true
} catch let error as NSError {
success = false
print("Error excluding \(URL.lastPathComponent!) from backup \(error)");
}
return success
}
在 swift 5 中为我运行的代码是...
var file: URL = <# your URL file #>
do {
var res = URLResourceValues()
res.isExcludedFromBackup = true
try file.setResourceValues(res)
} catch {
print(error)
}
当然你可以把它放在函数或扩展中。
我使用 Swift 1.2 时效果很好,因为我将 filePath 用作字符串。现在 Swift 2 希望我们所有人都使用 URL 路径,即使我正在阅读他们的文档,我也无法让它工作。
我有;
var fileName = "myRespondusCSV.csv"
let fileManager = NSFileManager.defaultManager()
let documentsURL = fileManager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask)
if let documentPath: NSURL = documentsURL.first as NSURL! {
filePath = documentPath.URLByAppendingPathComponent(fileName)
print(filePath)
} else {
fileManager.createFileAtPath(filePath!.path!,
contents: ("" as String).dataUsingEncoding(NSUTF8StringEncoding)!,
attributes:nil)
print("file has been created")
}
}
func excludeFileFromBackup() {
var error:NSError?
//var fileToExcludeh = NSURL.fileReferenceURL(filePath!)
var fileToExcludeh = fileURLWithPath(filePath)
let success = fileToExcludeh.setResourceValue(true, forKey: NSURLIsExcludedFromBackupKey, error: &error)
}
我收到“使用未解析的标识符 'fileURLWithPath'!
我应该使用绝对 URL 路径吗?
这应该有效
do {
try filePath.setResourceValue(true, forKey: NSURLIsExcludedFromBackupKey)
} catch _{
print("Failed")
}
Swift4如果有人需要的话:
var resourceValues = URLResourceValues()
resourceValues.isExcludedFromBackup = true
try? fileUrl.setResourceValues(resourceValues)
这适用于 Swift 3。
URL 必须是 var
.
let urls:[URL] = FileManager.default.urls(for:FileManager.SearchPathDirectory.documentDirectory, in:FileManager.SearchPathDomainMask.userDomainMask)
let appDirectory:URL = urls.last!
var fileUrl:URL = appDirectory.appendingPathComponent("myFile")
var resourceValues:URLResourceValues = URLResourceValues()
resourceValues.isExcludedFromBackup = true
do
{
try fileUrl.setResourceValues(resourceValues)
}
catch let error
{
print(error.localizedDescription)
}
这是我在 Swift 3
上的解决方案func addSkipBackupAttributeToItemAtURL(URL:NSURL) -> Bool {
var success: Bool
do {
try URL.setResourceValue(true, forKey:URLResourceKey.isExcludedFromBackupKey)
success = true
} catch let error as NSError {
success = false
print("Error excluding \(URL.lastPathComponent!) from backup \(error)");
}
return success
}
在 swift 5 中为我运行的代码是...
var file: URL = <# your URL file #>
do {
var res = URLResourceValues()
res.isExcludedFromBackup = true
try file.setResourceValues(res)
} catch {
print(error)
}
当然你可以把它放在函数或扩展中。