我的应用程序在Instagram上分享照片，为此，首先将其保存在临时目录中：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")
它正在研究Swift 1.2，但不适用于Swift 2.0。
给出错误消息是：
stringByAppendingPathComponent不可用：改为使用NSURL上的URLByAppendingPathComponent。
看起来在Swift 2.0中删除了stringByAppendingPathComponent方法，因此错误消息建议使用：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("instagram.igo")
更新：
URLByAppendingPathComponent()已被appendingPathComponent()取代，所以改为：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("instagram.igo")
斯威夫特4
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)
}
}
它适用于NSString所以你可以像这样使用它：
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，它首先将你的String转换为NSString然后执行操作。
你的代码将是：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")
这是另一种使用方法：
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)
}
}
参考HERE。
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)
}
}
只需将您的字符串换成NSString即可。
let writePath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent("instagram.igo")
对于Swift 3：
let writePath = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(directoryname).path
或者更好地创建此扩展：
extension String {
func appendingPathComponent(_ string: String) -> String {
return URL(fileURLWithPath: self).appendingPathComponent(string).path
}
}
用法：
let writePath = NSTemporaryDirectory().appendingPathComponent(directoryname)
Swift 3解决方案：
这是一个获取文档目录路径的函数 -
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
对于swift 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
}
您可以改用URLByAppendingPathComponent（）。请注意，您应修剪路径字符串以删除“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
}
请执行下列操作：
(("\(fileName)" as NSString).lastPathComponent as NSString).stringByDeletingPathExtension
如果使用NSString路径方法（而不是String URL方法）是可以接受的，那么使用计算属性或将其值返回String的方法扩展NSString要容易得多（而不是在String扩展中复制所需的方法）：
extension String
{
var ns: NSString { return self as NSString }
}
然后：
swiftStringPath.ns.appendingPathComponent("whateva")
swiftStringPath.ns.deletingPathExtension