ios stringByAppendingPathComponent 不可用
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stringByAppendingPathComponent is unavailable
提问by Maysam
My app shares photo on Instagram, to do this it first saves it on a temporary directory:
我的应用程序在 Instagram 上分享照片，为此它首先将它保存在一个临时目录中：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")
It was working on Swift 1.2, but does not work on Swift 2.0.
它正在工作Swift 1.2，但不工作Swift 2.0。
Given error message is:
给定的错误信息是：
stringByAppendingPathComponent is unavailable: use URLByAppendingPathComponent on NSURL instead.
stringByAppendingPathComponent 不可用：在 NSURL 上使用 URLByAppendingPathComponent 代替。
回答by Dániel Nagy
It looks like the method stringByAppendingPathComponentis removed in Swift 2.0, so what the error message suggests is to use:
看起来该方法stringByAppendingPathComponent已在 Swift 2.0 中删除，因此错误消息建议使用：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("instagram.igo")
Update:
更新：
URLByAppendingPathComponent()has been replaced by appendingPathComponent()so instead do:
URLByAppendingPathComponent()已被替换为appendingPathComponent()所以改为：
let writePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("instagram.igo")
回答by Dharmesh Kheni
It is working for NSStringso you can use it like this:
它正在工作，NSString因此您可以像这样使用它：
extension String {
func stringByAppendingPathComponent(path: String) -> String {
let nsSt = self as NSString
return nsSt.stringByAppendingPathComponent(path)
}
}
Now you can use this extension which will convert your Stringto NSStringfirst and then perform operation.
现在您可以使用此扩展程序，它将首先转换String为NSString，然后执行操作。
And your code will be:
你的代码将是：
let writePath = NSTemporaryDirectory().stringByAppendingPathComponent("instagram.igo")
Here is some another methods for use:
下面是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)
}
}
Reference from HERE.
从这里参考。
For swift 3.0:
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)
}
}
回答by Jeffrey Neo
Simply wrap your string as NSString.
只需将您的字符串包装为NSString.
let writePath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent("instagram.igo")
回答by Vyacheslav
for Swift 3:
对于Swift 3：
let writePath = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(directoryname).path
or better create this extension:
或者更好地创建这个扩展：
extension String {
func appendingPathComponent(_ string: String) -> String {
return URL(fileURLWithPath: self).appendingPathComponent(string).path
}
}
usage:
用法：
let writePath = NSTemporaryDirectory().appendingPathComponent(directoryname)
回答by Revanth
Swift 3 Solution:
斯威夫特 3 解决方案：
Here is a function to get the documents directory path-
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
}
How to use:
如何使用：
getDocumentsDirectory.appendingPathComponent("google.com")
Result:
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
回答by Mehul Chuahan
For swift 2.0
快速 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
}
回答by user2374993 - Inbal Tish
You can use URLByAppendingPathComponent() instead. Please note that you should trim the path string to remove “file://“ prefix:
您可以改用 URLByAppendingPathComponent()。请注意，您应该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
}
回答by Mauro Delazeri
Do the following:
请执行下列操作：
(("\(fileName)" as NSString).lastPathComponent as NSString).stringByDeletingPathExtension
回答by Anna S.
I tried this and it solved the problem.
我试过了，它解决了这个问题。
before:
前：
let localPath = documentDirectory.URLByAppendingPathComponent(imageName)
after:
后：
let localPath = (documentDirectory as NSString).appendingPathComponent(imageName)
回答by Russian
If using NSStringpath methods (instead of StringURL methods) is acceptable, it's much easier to extend Stringwith a computed property or a method returning its value as NSString(instead of duplicating the desired methods in Stringextension):
如果使用NSString路径方法（而不是StringURL 方法）是可以接受的，那么String使用计算属性或返回其值的方法NSString（而不是在String扩展中复制所需的方法）更容易扩展：
extension String
{
var ns: NSString { return self as NSString }
}
and then:
进而：
swiftStringPath.ns.appendingPathComponent("whateva")
swiftStringPath.ns.deletingPathExtension
