在Swift中获取文件大小
我尝试了几种方法来获取文件大小，但总是得到零。
let path = NSBundle.mainBundle().pathForResource("movie", ofType: "mov") let attr = NSFileManager.defaultManager().attributesOfFileSystemForPath(path!, error: nil) if let attr = attr { let size: AnyObject? = attr[NSFileSize] println("File size = \(size)") } 我得到日志： File size = nil
试试这个：+使用attributesOfItemAtPath代替attributesOfFileSystemForPath +在你的attr上调用.fileSize（）。
var filePath: NSString = "your path here" var fileSize : UInt64 var attr:NSDictionary? = NSFileManager.defaultManager().attributesOfItemAtPath(filePath, error: nil) if let _attr = attr { fileSize = _attr.fileSize(); }
在Swift 2.0中，我们使用try try catch模式，像这样：
let filePath = "your path here" var fileSize : UInt64 = 0 do { let attr : NSDictionary? = try NSFileManager.defaultManager().attributesOfItemAtPath(filePath) if let _attr = attr { fileSize = _attr.fileSize(); } } catch { print("Error: \(error)") }
在Swift 3.x / 4.0中：
let filePath = "your path here" var fileSize : UInt64 do { //return [FileAttributeKey : Any] let attr = try FileManager.default.attributesOfItem(atPath: filePath) fileSize = attr[FileAttributeKey.size] as! UInt64 //if you convert to NSDictionary, you can get file size old way as well. let dict = attr as NSDictionary fileSize = dict.fileSize() } catch { print("Error: \(error)") }
这是Biodave的答案，正确的文件pipe理器调用
func sizeForLocalFilePath(filePath:String) -> UInt64 { do { let fileAttributes = try NSFileManager.defaultManager().attributesOfItemAtPath(filePath) if let fileSize = fileAttributes[NSFileSize] { return (fileSize as! NSNumber).unsignedLongLongValue } else { print("Failed to get a size attribute from path: \(filePath)") } } catch { print("Failed to get file attributes for local path: \(filePath) with error: \(error)") } return 0 }
SWIFT 3来自@ Hoa的答案，加上一个让UInt64可读的string的函数。
func sizeForLocalFilePath(filePath:String) -> UInt64 { do { let fileAttributes = try FileManager.default.attributesOfItem(atPath: filePath) if let fileSize = fileAttributes[FileAttributeKey.size] { return (fileSize as! NSNumber).uint64Value } else { print("Failed to get a size attribute from path: \(filePath)") } } catch { print("Failed to get file attributes for local path: \(filePath) with error: \(error)") } return 0 } func covertToFileString(with size: UInt64) -> String { var convertedValue: Double = Double(size) var multiplyFactor = 0 let tokens = ["bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"] while convertedValue > 1024 { convertedValue /= 1024 multiplyFactor += 1 } return String(format: "%4.2f %@", convertedValue, tokens[multiplyFactor]) }
尝试这个。
let MyUrl = NSURL(fileURLWithPath: "*** Custom File Path ***") let fileAttributes = try! NSFileManager.defaultManager().attributesOfItemAtPath(MyUrl.path!) let fileSizeNumber = fileAttributes[NSFileSize] as! NSNumber let fileSize = fileSizeNumber.longLongValue var sizeMB = Double(fileSize / 1024) sizeMB = Double(sizeMB / 1024) print(String(format: "%.2f", sizeMB) + " MB")
在Swift 3.0中，请尝试以下操作：
let fileSize = try! FileManager.default.attributesOfItem(atPath: "/bin/bash")[FileAttributeKey.size] as! Int
甚至更好：
let fileSize = (try! FileManager.default.attributesOfItem(atPath: "/bin/bash")[FileAttributeKey.size] as! NSNumber).uint64Value
下面是一个紧凑的版本，用Swift 2.0 for iOS9通过Xcode7写成快乐的方法：
func sizeForLocalFilePath(filePath:String) -> UInt64 { do { let fileAttributes = try NSFileManager().attributesOfFileSystemForPath(filePath) if let fileSize = fileAttributes[NSFileSystemSize] as? UInt64 { return fileSize } else { print("Failed to get a size attribute from path: \(filePath)") } } catch { print("Failed to get file attributes for local path: \(filePath) with error: \(error)") } return 0 }
请享用！
Swift 4解决scheme：这个函数返回MB大小。
func sizePerMB(url: URL?) -> Double { guard let filePath = url?.path else { return 0.0 } do { let attribute = try FileManager.default.attributesOfItem(atPath: filePath) if let size = attribute[FileAttributeKey.size] as? NSNumber { return size.doubleValue / 1000000.0 } } catch { print("Error: \(error)") } return 0.0 }