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(Objective-C) Replace/Update a FIle in a .zipDemonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten. Note: This example requires Chilkat v11.0.0 or greater.
#import <CkoZip.h> #import <NSString.h> #import <CkoZipEntry.h> BOOL success = NO; // This requires the Chilkat Zip API to have been previously unlocked. // See Unlock Chilkat Zip for sample code. // First prepare a .zip and write it.. CkoZip *zip = [[CkoZip alloc] init]; [zip NewZip: @"qa_output/abc.zip"]; // Add some files.. NSString *charset = @"utf-8"; [zip AddString: @"a.txt" content: @"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" charset: charset]; [zip AddString: @"b.txt" content: @"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" charset: charset]; [zip AddString: @"c.txt" content: @"cccccccccccccccccccccccccccccccccccc" charset: charset]; // Write to qa_output/abc.zip // This .zip contains three files: a.txt, b.txt, and c.txt success = [zip WriteZipAndClose]; // ------------------------------------------------------------------- // Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write. CkoZip *zip2 = [[CkoZip alloc] init]; [zip2 OpenZip: @"qa_output/abc.zip"]; CkoZipEntry *entry = [[CkoZipEntry alloc] init]; if ([zip2 EntryOf: @"b.txt" entry: entry] == YES) { [entry ReplaceString: @"This is the new content. bbbbbbbbbbbbbbbbbbbbbb" charset: @"utf-8"]; } // Write the modified .zip back to "abc.zip" success = [zip2 WriteZipAndClose]; NSLog(@"%@",@"success."); |
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