(IOS) Append Dir Tree to Existing Zip w/out Rewriting Entire Zip

Demonstrates how to use the QuickAppend method to append a directory tree to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. Note: The QuickAppend method is new and available in the pre-release downloads, or in official releases dated after 6-October-2007.

Download: Chilkat IOS (IPhone) Objective-C Libraries

NSMutableString *strOutput = [NSMutableString stringWithCapacity:1000];

CkoZip *zip = [[[CkoZip alloc] init] autorelease];

BOOL success;

//  Any string unlocks the component for the 1st 30-days.
success = [zip UnlockComponent: @"Anything for 30-day trial"];
if (success != YES) {
    [strOutput appendString: zip.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    return;
}

//  The NewZip method only initializes the Zip object -- it does
//  not create or write a .zip file.
success = [zip NewZip: @"notUsed.zip"];
if (success != YES) {
    [strOutput appendString: zip.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    return;
}

//  Add a references to all files in a directory tree.
//  Note: this does not read or compress the file contents --
//  it simply adds file references to the zip object.
BOOL recurse;
recurse = YES;
success = [zip AppendFiles: @"c:/temp/abc123/*" recurse: recurse];
if (success != YES) {
    [strOutput appendString: zip.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    return;
}

//  Appends the contents of the zip object to the preExisting.zip
//  zip archive.  preExisting.zip is opened, and the files
//  referenced by this zip object are streamed in, compressed,
//  and appended to the end of the archive.
success = [zip QuickAppend: @"preExisting.zip"];
if (success != YES) {
    [strOutput appendString: zip.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    return;
}

[strOutput appendString: @"Success!"];
[strOutput appendString: @"\n"];

//  Note: Additional files, directory trees, or in-memory data
//  can be appended by calling AppendOneFileOrDir, AppendFiles,
//  AppendString, AppendData, etc. multiple times.
//  Whatever files and/or in-memory data that are referenced by
//  this zip object will be appended to preExisting.zip when
//  QuickAppend is called.


self.mainTextField.stringValue = strOutput;