ios - How to unzip a big zip file containing one file and get the progress in bytes with swift? -


i try unzip big zip file containing 1 item (more 100mb) , show progress during unzipping.

i found solutions progress can determined based on amount of files unzipped in case have 1 big file inside. guess must determined amount of bytes unzipped?

actually using ssziparchive following code works fine:

    var myzipfile:nsstring="/users/user/library/developer/coresimulator/devices/mydevice/ziptest/testzip.zip";     var destpath:nsstring="/users/user/library/developer/coresimulator/devices/mydevice/ziptest/";       let unzipped = ssziparchive.unzipfileatpath(myzipfile as! string, todestination: destpath as! string);

i found no solutions this.

does have hint, sample or link sample ?

update: following code looks work intended, handler called once (at end of unzipping) when 1 file unzipped:

func unzipfile(szipfile: string, todest: string){          ssziparchive.unzipfileatpath(szipfile, todestination: todest, progresshandler: {             (entry, zipinfo, readbyte, totalbyte) -> void in               println("readbyte : \(readbyte)") // <- called once, @ end of unzipping. 500mb zipfile holds 1 file.              println("totalbyte : \(totalbyte)")               //asynchrone task             dispatch_async(dispatch_get_main_queue()) {                 println("readbyte : \(readbyte)")                 println("totalbyte : \(totalbyte)")                  //change progress value              }             }, completionhandler: { (path, success, error) -> void in                 if success {                     //successful!!                 } else {                     println(error)                 }         })      }

update 2:

as "martin r" analysed in ssarchive, not possible. there other way unzip file , show progress based kbytes?

update 3:

i changed ssziparchive.m after solution explained "roop" follows. else can use too:

file *fp = fopen((const char*)[fullpath utf8string], "wb");                 while (fp) {                     int readbytes = unzreadcurrentfile(zip, buffer, 4096);                      if (readbytes > 0) {                         fwrite(buffer, readbytes, 1, fp );                         totalbytesread=totalbytesread+4096;                         // added me                         if (progresshandler)                         {                             progresshandler(strpath, fileinfo, currentfilenumber, totalbytesread);                         }                         // end added me                      } else {                         break;                     }                 }

to achieve want, have modify ssziparchive's internal code.

ssziparchive uses minizip provide zipping functionality. can see minizip unzipping api here: unzip.h.

in ssziparchive.m, can uncompressed size of file being unzipped fileinfo variable.

you can see unzipped contents being read here:

 file *fp = fopen((const char*)[fullpath utf8string], "wb");  while (fp) {      int readbytes = unzreadcurrentfile(zip, buffer, 4096);      if (readbytes > 0) {          fwrite(buffer, readbytes, 1, fp );      } else {          break;      }  }

you need readbytes , uncompressed file size compute progress single file. can add new delegate ssziparchive send these data calling code.


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