如何在OS X上使用Swift获取目录大小
我想要获取目录的大小以及它在OS X上使用Swift的内容。到目前为止,我只能获得目录本身的大小,而没有任何内容。对于我的大多数目录,它通常显示6,148字节的值,但它确实是varie。如何在OS X上使用Swift获取目录大小
我已经尝试从下面的文件directorySize()函数,但它也返回6,148字节。
我想从这个问题上2回答,但无法确定是什么争论它需要通过斯威夫特Objective-C的功能。我相信它需要一个指针(我是一个开始学习的程序员)。
Calculate the size of a folder
我不能从这里得到的斯威夫特答案,我的目的工作,要么。
How to get the file size given a path?
我使用的Xcode 7.0和运行OS X 10.10.5。
更新:的Xcode 8.2.1•斯威夫特3.0.2
// get your directory url
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// check if the url is a directory
if (try? documentsDirectoryURL.resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory == true {
print("url is a folder url")
// lets get the folder files
var folderSize = 0
(try? FileManager.default.contentsOfDirectory(at: documentsDirectoryURL, includingPropertiesForKeys: nil))?.lazy.forEach {
folderSize += (try? $0.resourceValues(forKeys: [.totalFileAllocatedSizeKey]))?.totalFileAllocatedSize ?? 0
}
// format it using NSByteCountFormatter to display it properly
let byteCountFormatter = ByteCountFormatter()
byteCountFormatter.allowedUnits = .useBytes
byteCountFormatter.countStyle = .file
let folderSizeToDisplay = byteCountFormatter.string(for: folderSize) ?? ""
print(folderSizeToDisplay) // "X,XXX,XXX bytes"
}
如果你想包括您需要使用enumeratorAtURL如下所有子文件夹,隐藏文件和文件包的后裔:
// get your directory url
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// check if the url is a directory
if (try? documentsDirectoryURL.resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory == true {
var folderSize = 0
(FileManager.default.enumerator(at: documentsDirectoryURL, includingPropertiesForKeys: nil)?.allObjects as? [URL])?.lazy.forEach {
folderSize += (try? $0.resourceValues(forKeys: [.totalFileAllocatedSizeKey]))?.totalFileAllocatedSize ?? 0
}
let byteCountFormatter = ByteCountFormatter()
byteCountFormatter.allowedUnits = .useBytes
byteCountFormatter.countStyle = .file
let sizeToDisplay = byteCountFormatter.string(for: folderSize) ?? ""
print(sizeToDisplay) // "X,XXX,XXX bytes"
}
斯威夫特3版本在这里:
func findSize(path: String) throws -> UInt64 {
let fullPath = (path as NSString).expandingTildeInPath
let fileAttributes: NSDictionary = try FileManager.default.attributesOfItem(atPath: fullPath) as NSDictionary
if fileAttributes.fileType() == "NSFileTypeRegular" {
return fileAttributes.fileSize()
}
let url = NSURL(fileURLWithPath: fullPath)
guard let directoryEnumerator = FileManager.default.enumerator(at: url as URL, includingPropertiesForKeys: [URLResourceKey.fileSizeKey], options: [.skipsHiddenFiles], errorHandler: nil) else { throw FileErrors.BadEnumeration }
var total: UInt64 = 0
for (index, object) in directoryEnumerator.enumerated() {
guard let fileURL = object as? NSURL else { throw FileErrors.BadResource }
var fileSizeResource: AnyObject?
try fileURL.getResourceValue(&fileSizeResource, forKey: URLResourceKey.fileSizeKey)
guard let fileSize = fileSizeResource as? NSNumber else { continue }
total += fileSize.uint64Value
if index % 1000 == 0 {
print(".", terminator: "")
}
}
if total < 1048576 {
total = 1
}
else
{
total = UInt64(total/1048576)
}
return total
}
enum FileErrors : ErrorType {
case BadEnumeration
case BadResource
}
输出值为兆字节。 从源转换:https://gist.github.com/rayfix/66b0a822648c87326645
请注意,您还需要(从源代码引用):枚举FileErrors:错误{ 情况下BadEnumeration 情况下BadResource } –
我添加了错误类型枚举也。 Thx丹 –
夫特3版
private func sizeToPrettyString(size: UInt64) -> String {
let byteCountFormatter = ByteCountFormatter()
byteCountFormatter.allowedUnits = .useMB
byteCountFormatter.countStyle = .file
let folderSizeToDisplay = byteCountFormatter.string(fromByteCount: Int64(size))
return folderSizeToDisplay
}
有低于2个的屏幕截图。我无法获得大小匹配。 My Documents目录是〜1.50绿带 https://drive.google.com/file/d/0B8F7IPsTUK7gUEVzeU5JRTF0Qms/view?usp=sharing 但控制台只报告272个字节 https://drive.google。 com/file/d/0B8F7IPsTUK7gaDBiZkdfREZhWkE/view?usp = sharing – JackVaughn
它是本地文件夹吗? –
就是这样。对我的代码进行的唯一更改是打印文档url,以确保它是正确的。 – JackVaughn