Swift uses ssziparchive to implement file compression, decompression code

In order to save traffic, we need to package them into zip files for transmission, or unzip the downloaded zip package. This article describes how to use ziparchive for file compression, decompression operations.

1,ssziparchive Introduction

Ssziparchive is a use of objective-c written in the iOS, Mac compression, decompression tool class.
GitHub Address: Https://github.com/ZipArchive/ZipArchive
Features are as follows:

(1) Extract zip file
(2) Unzip the zip file with password protection
(3) Create zip file
(4) Add new file to zip file
(5) Compressed file
(6) using a name to compress the NSData object

Installation configuration for 2,ssziparchive

(1) Add the downloaded Ssziparchive folder to the project

(2) Create the bridge header file Bridge.h to contain the OBJECTIVE-C header files that need to be referenced as follows:

#import "ZipArchive.h"

(3) Click the plus sign in the project target-> build phases-> Link Binary with libraries, add libz.dylib

3, using the sample

First, in order to facilitate the next test, we first add two pictures in the project, as well as two compressed package files (where Test_password.zip is a password-packed package, the password is: hangge.com)

Also define a method to return the target path (each call creates a random folder under the program's caches) so that each compressed, uncompressed target save address does not conflict:

Randomly create a folder under the Caches folder and return to the path
Func Tempdestpath ()-> String? {
var path = Nssearchpathfordirectoriesindomains (. Cachesdirectory,
. Userdomainmask, True) [0]
Path + = "/\ (Nsuuid (). uuidstring) "
Let URL = Nsurl (Fileurlwithpath:path)

do {
Try Nsfilemanager.defaultmanager (). Createdirectoryaturl (URL,
Withintermediatedirectories:true, Attributes:nil)
catch {
return Nil
}

If let Path = Url.path {
Print ("Path:\ (Path)")
return path
}

return Nil
}

(1) Extract the normal zip file

Let Zippath = Nsbundle.mainbundle (). Pathforresource ("Test", OfType: "Zip")
Ssziparchive.unzipfileatpath (Zippath, Todestination:tempdestpath ())

(2) Unzip the zip file with the password

Let zipPath2 = Nsbundle.mainbundle (). Pathforresource ("Test_password", OfType: "Zip")

do {
Try Ssziparchive.unzipfileatpath (ZipPath2, Todestination:tempdestpath (),
Overwrite:true, Password: "hangge.com")
catch {
}

(3) Make the file into a compressed package

let files = [Nsbundle.mainbundle (). Pathforresource ("logo", OfType: "PNG")!,
Nsbundle.mainbundle (). Pathforresource ("icon", OfType: "PNG")!]

Let ZipPath3 = Tempdestpath ()! + "/hangge.zip"

Ssziparchive.createzipfileatpath (ZipPath3, Withfilesatpaths:files)

Of course, we can also add a password to the compressed package:

Ssziparchive.createzipfileatpath (ZipPath3, Withfilesatpaths:files,
Withpassword: "hangge.com")

(4) The file under the entire folder into a compressed package

Folders that need to be compressed.
Let filepath:string = nshomedirectory () + "/documents"
Add a file to the folder first
Let image = UIImage (named: "Logo.png")
Let Data:nsdata = Uiimagepngrepresentation (image!)!
Data.writetofile (FilePath + "/logo.png", Atomically:true)


Let ZipPath5 = Tempdestpath ()! + "/hangge.zip"
Ssziparchive.createzipfileatpath (ZipPath5, Withcontentsofdirectory:filepath)
Similarly, we can also add a password:

Ssziparchive.createzipfileatpath (ZipPath6, Withcontentsofdirectory:filepath,
Withpassword: "hangge.com")//with password