Creating zip files in ObjectiveC for iPhone - iphone

Question

Is it possible to create .zip files in objective C ?
Any libraries available or suggestions ?

Answer 1

first you download Objective-zip example from http://code.google.com/p/objective-zip/downloads/list
in this example Find and copy three folder Objective-Zip, MiniZip and ZLib drag in to your project
import two class in you .m class
"ZipFile.h" and
"ZipWriteStream.h"
create method of zip my code is :-
-(IBAction)Zip{
self.fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory , NSUserDomainMask, YES);
NSString *ZipLibrary = [paths objectAtIndex:0];
NSString *fullPathToFile = [ZipLibrary stringByAppendingPathComponent:#"backUp.zip"];
//[self.fileManager createDirectoryAtPath:fullPathToFile attributes:nil];
//self.documentsDir = [paths objectAtIndex:0];
ZipFile *zipFile = [[ZipFile alloc]initWithFileName:fullPathToFile mode:ZipFileModeCreate];
NSError *error = nil;
self.fileManager = [NSFileManager defaultManager];
NSArray *paths1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
self.documentsDir = [paths1 objectAtIndex:0];
NSArray *files = [[NSFileManager defaultManager]contentsOfDirectoryAtPath:self.documentsDir error:&error];
//for(NSString *filename in files){
for(int i = 0;i<files.count;i++){
id myArrayElement = [files objectAtIndex:i];
if([myArrayElement rangeOfString:#".png" ].location !=NSNotFound){
NSLog(#"add %#", myArrayElement);
NSString *path = [self.documentsDir stringByAppendingPathComponent:myArrayElement];
NSDictionary *attributes = [[NSFileManager defaultManager]attributesOfItemAtPath:path error:&error];
NSDate *Date = [attributes objectForKey:NSFileCreationDate];
ZipWriteStream *streem = [zipFile writeFileInZipWithName:myArrayElement fileDate:Date compressionLevel:ZipCompressionLevelBest];
NSData *data = [NSData dataWithContentsOfFile:path];
// NSLog(#"%d",data);
[streem writeData:data];
[streem finishedWriting];
}else if([myArrayElement rangeOfString:#".txt" ].location !=NSNotFound)
{
NSString *path = [self.documentsDir stringByAppendingPathComponent:myArrayElement];
NSDictionary *attributes = [[NSFileManager defaultManager]attributesOfItemAtPath:path error:&error];
NSDate *Date = [attributes objectForKey:NSFileCreationDate];
ZipWriteStream *streem = [zipFile writeFileInZipWithName:myArrayElement fileDate:Date compressionLevel:ZipCompressionLevelBest];
NSData *data = [NSData dataWithContentsOfFile:path];
// NSLog(#"%d",data);
[streem writeData:data];
[streem finishedWriting];
}
}
[self testcsv];
[zipFile close];
}
your documents directory saved item .png and .txt files zipping in Library folder with backup.zip
i hope this is helps

Answer 2

BEfore someone mentions http://code.google.com/p/ziparchive/ .. I evaluated that code and it is pretty terrible. I ended up using it for a quick demo hack that had to do but I would never use it in production. ZipKit http://bitbucket.org/kolpanic/zipkit/wiki/Home seems to be in much better shape.

Answer 3

NSString *stringPath1 = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]];
NSString *FileName=[stringPath1 stringByAppendingPathComponent:#"Your file name"];
NSString *stringPath=[stringPath1 stringByAppendingPathComponent:[#"Your file name" stringByAppendingFormat:#".zip"]];
NSArray *files = [[NSFileManager defaultManager]contentsOfDirectoryAtPath:FileName error:&error];
ZipFile *zipFile = [[ZipFile alloc]initWithFileName:stringPath mode:ZipFileModeCreate];
for(int i = 0;i<files.count;i++){
id myArrayElement = [files objectAtIndex:i];
NSLog(#"add %#", myArrayElement);
NSString *path = [FileName stringByAppendingPathComponent:myArrayElement];
NSDictionary *attributes = [[NSFileManager defaultManager]attributesOfItemAtPath:path error:&error];
NSDate *Date = [attributes objectForKey:NSFileCreationDate];
ZipWriteStream *streem = [zipFile writeFileInZipWithName:myArrayElement fileDate:Date compressionLevel:ZipCompressionLevelBest];
NSData *data = [NSData dataWithContentsOfFile:path];
[streem writeData:data];
[streem finishedWriting];
}
[zipFile close];