(Objective-C) Unzip Some Files by Iterating over Entries

Demonstrates how to unzip specific files by iterating over entries in a .zip.

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#import <CkoZip.h>
#import <CkoStringBuilder.h>
#import <CkoZipEntry.h>
#import <NSString.h>

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

// Open a .zip containing:
// 
// a1.xml
// b1.xml
// c1.xml
// dir1/a2.xml
// dir1/c2.xml
// dir2/dir3/c3.xml

// We wish to unzip only a1.xml, b1.xml, and c1.xml
BOOL success = [zip OpenZip: @"qa_data/zips/xml_files.zip"];
if (success != YES) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

CkoStringBuilder *sbFilename = [[CkoStringBuilder alloc] init];

int numEntries = [zip.NumEntries intValue];
int i = 0;
while (i < numEntries) {
    CkoZipEntry *entry = [zip GetEntryByIndex: [NSNumber numberWithInt: i]];

    NSString *entryFilePath = entry.FileName;
    NSLog(@"%@",entryFilePath);

    if (entry.IsDirectory == NO) {
        [sbFilename SetString: entryFilePath];
        if ([sbFilename Contains: @"/" caseSensitive: NO] == NO) {
            // Does not contain "/"
            // Unzip to the qa_output directory.
            success = [entry Extract: @"qa_output"];
            if (success == NO) {
                NSLog(@"%@%@",@"Failed to unzip ",entryFilePath);
            }
            else {
                NSLog(@"%@%@",@"Unzipped ",entryFilePath);
            }

        }

    }

    i = i + 1;
}