从Cocoa应用程序创建ZIP归档文件

Question

是否存在与Java包java.util.zip中包含的Objective-C类相同的Objective-C类？
是执行CLI命令唯一的选择吗？

Answer 1

从iOS8/OSX10.10开始，有一种使用NSFileCoordinatorReadingOptions.ForUploading创建zip档案的内置方法。一个简单的例子创建ZIP档案没有任何非可可的依赖关系：

public extension NSURL { 

    /// Creates a zip archive of the file/folder represented by this URL and returns a references to the zipped file 
    /// 
    /// - parameter dest: the destination URL; if nil, the destination will be this URL with ".zip" appended 
    func zip(dest: NSURL? = nil) throws -> NSURL { 
     let destURL = dest ?? self.URLByAppendingPathExtension("zip") 

     let fm = NSFileManager.defaultManager() 
     var isDir: ObjCBool = false 

     let srcDir: NSURL 
     let srcDirIsTemporary: Bool 
     if let path = self.path where self.fileURL && fm.fileExistsAtPath(path, isDirectory: &isDir) && isDir.boolValue == true { 
      // this URL is a directory: just zip it in-place 
      srcDir = self 
      srcDirIsTemporary = false 
     } else { 
      // otherwise we need to copy the simple file to a temporary directory in order for 
      // NSFileCoordinatorReadingOptions.ForUploading to actually zip it up 
      srcDir = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent(NSUUID().UUIDString) 
      try fm.createDirectoryAtURL(srcDir, withIntermediateDirectories: true, attributes: nil) 
      let tmpURL = srcDir.URLByAppendingPathComponent(self.lastPathComponent ?? "file") 
      try fm.copyItemAtURL(self, toURL: tmpURL) 
      srcDirIsTemporary = true 
     } 

     let coord = NSFileCoordinator() 
     var error: NSError? 

     // coordinateReadingItemAtURL is invoked synchronously, but the passed in zippedURL is only valid 
     // for the duration of the block, so it needs to be copied out 
     coord.coordinateReadingItemAtURL(srcDir, options: NSFileCoordinatorReadingOptions.ForUploading, error: &error) { (zippedURL: NSURL) -> Void in 
      do { 
       try fm.copyItemAtURL(zippedURL, toURL: destURL) 
      } catch let err { 
       error = err as NSError 
      } 
     } 

     if srcDirIsTemporary { try fm.removeItemAtURL(srcDir) } 
     if let error = error { throw error } 
     return destURL 
    } 
} 

public extension NSData { 
    /// Creates a zip archive of this data via a temporary file and returns the zipped contents 
    func zip() throws -> NSData { 
     let tmpURL = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent(NSUUID().UUIDString) 
     try self.writeToURL(tmpURL, options: NSDataWritingOptions.DataWritingAtomic) 
     let zipURL = try tmpURL.zip() 
     let fm = NSFileManager.defaultManager() 
     let zippedData = try NSData(contentsOfURL: zipURL, options: NSDataReadingOptions()) 
     try fm.removeItemAtURL(tmpURL) // clean up 
     try fm.removeItemAtURL(zipURL) 
     return zippedData 
    } 
} 

Answer 2

• 有一个zip框架，http://code.google.com/p/zip-framework/，但它似乎处于早期（版本0.1）阶段。

• 上cocoadev其他答案：http://cocoadev.com/ZipArchiveLibraryForCocoa从那里

• 一个答案：ZipKit，https://github.com/kolpanic/ZipKit

Answer 3

退房http://code.google.com/p/ziparchive/。这是一个压缩文件的类。 Google是你的朋友！

Answer 4

除了在您自己的过程中阅读和编写zip归档文件，使用NSTask运行zip和unzip并不是件耻辱。

Answer 5

另外：http://www.cocoadev.com/index.pl?NSDataCategory

Answer 6

退房zipzap，我快zip文件I/O库。