stringByAppendingPathComponent不可用
我的应用程序在Instagram上分享照片，首先将其保存在临时目录中：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo") 它正在使用Swift 1.2 ，但在Swift 2.0上不起作用。
鉴于错误信息是：
stringByAppendingPathComponent不可用：改为在NSURL上使用URLByAppendingPathComponent。
它看起来像在Swift 2.0中删除方法stringByAppendingPathComponent ，所以错误消息build议使用：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("instagram.igo")
更新：
URLByAppendingPathComponent()已被URLByAppendingPathComponent()replace，所以做：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("instagram.igo")
它正在为NSString工作，所以你可以这样使用它：
extension String { func stringByAppendingPathComponent(path: String) -> String { let nsSt = self as NSString return nsSt.stringByAppendingPathComponent(path) } }
现在你可以使用这个扩展，它将把你的String转换成NSString ，然后执行操作。
而你的代码将是：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")
这里有一些其他的使用方法：
extension String { var lastPathComponent: String { return (self as NSString).lastPathComponent } var pathExtension: String { return (self as NSString).pathExtension } var stringByDeletingLastPathComponent: String { return (self as NSString).stringByDeletingLastPathComponent } var stringByDeletingPathExtension: String { return (self as NSString).stringByDeletingPathExtension } var pathComponents: [String] { return (self as NSString).pathComponents } func stringByAppendingPathComponent(path: String) -> String { let nsSt = self as NSString return nsSt.stringByAppendingPathComponent(path) } func stringByAppendingPathExtension(ext: String) -> String? { let nsSt = self as NSString return nsSt.stringByAppendingPathExtension(ext) } }
从这里引用。
对于swift 3.0：
extension String { func stringByAppendingPathComponent1(path: String) -> String { let nsSt = self as NSString return nsSt.appendingPathComponent(path) } } let writePath = NSTemporaryDirectory().stringByAppendingPathComponent(path: "instagram.igo") extension String { var lastPathComponent: String { return (self as NSString).lastPathComponent } var pathExtension: String { return (self as NSString).pathExtension } var stringByDeletingLastPathComponent: String { return (self as NSString).deletingLastPathComponent } var stringByDeletingPathExtension: String { return (self as NSString).deletingPathExtension } var pathComponents: [String] { return (self as NSString).pathComponents } func stringByAppendingPathComponent(path: String) -> String { let nsSt = self as NSString return nsSt.appendingPathComponent(path) } func stringByAppendingPathExtension(ext: String) -> String? { let nsSt = self as NSString return nsSt.appendingPathExtension(ext) } }
简单地把你的stringNSString 。
let writePath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent("instagram.igo")
对于Swift 3 ：
let writePath = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(directoryname).path
或者更好的创build这个扩展：
extension String { func appendingPathComponent(_ string: String) -> String { return URL(fileURLWithPath: self).appendingPathComponent(string).path } }
用法：
let writePath = NSTemporaryDirectory().appendingPathComponent(directoryname)
为迅速2.0
// Get the documents Directory func documentsDirectory() -> String { let documentsFolderPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] return documentsFolderPath } // Get path for a file in the directory func fileInDocumentsDirectory(filename: String) -> String { let writePath = (documentsDirectory() as NSString).stringByAppendingPathComponent("Mobile") if (!NSFileManager.defaultManager().fileExistsAtPath(writePath)) { do { try NSFileManager.defaultManager().createDirectoryAtPath(writePath, withIntermediateDirectories: false, attributes: nil) } catch let error as NSError { print(error.localizedDescription); } } return (writePath as NSString).stringByAppendingPathComponent(filename) } //# MARK: - Save Image in Doc dir func saveImage (image: UIImage, path: String ) -> Bool{ let pngImageData = UIImagePNGRepresentation(image) // let jpgImageData = UIImageJPEGRepresentation(image, 1.0) // if you want to save as JPEG let result = pngImageData!.writeToFile(path, atomically: true) print("\(result)") print("\(path)") return result }
Swift 3解决scheme：
这是一个获取文档目录path的函数，
func getDocumentsDirectory() -> URL { let paths = FileManager.default.urls(for: .documentDirectory, in:.userDomainMask) let documentsDirectory = paths[0] return documentsDirectory }
如何使用：
getDocumentsDirectory.appendingPathComponent("google.com")
结果：
file:///var/folders/w1/3rcp2fvs1qv43hfsh5876s0h0000gn/T/com.apple.dt.Xcode.pg/containers/com.apple.dt.playground.stub.iOS_Simulator.MyPlayground-7CF9F706-509C-4D4C-997E-AB8FE9E4A6EA/Documents/google.com
您可以使用URLByAppendingPathComponent（）。 请注意，您应该修剪pathstring以删除“file：//”前缀：
let uniqueFileName = NSUUID().UUIDString let documentsDirectory = getDocumentsDirectoryURL() if let path = documentsDirectory?.URLByAppendingPathComponent(uniqueFileName) { var pathString = path.absoluteString pathString = imagePathString.stringByTrimmingCharactersInSet(NSCharacterSet(charactersInString: "file://")) } func getDocumentsDirectoryURL() -> NSURL? { let fileManager = NSFileManager() if let docsDirectory = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first { return docsDirectory } return nil }
执行以下操作：
(("\(fileName)" as NSString).lastPathComponent as NSString).stringByDeletingPathExtension
