开源项目objectivezip

Objective-Zip is a small Cocoa/Objective-C library that wraps ZLib and MiniZip in an object-oriented friendly way.

项目地址：

http://code.google.com/p/objective-zip/

部分使用代码：（代码来自官网下载）

- (void) test {
    NSAutoreleasePool *pool= [[NSAutoreleasePool alloc] init];

    @try {
        NSString *documentsDir= [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        NSString *filePath= [documentsDir stringByAppendingPathComponent:@"test.zip"];

        [self performSelectorOnMainThread:@selector(log:) withObject:@"Opening zip file for writing..." waitUntilDone:YES];
        
        ZipFile *zipFile= [[ZipFile alloc] initWithFileName:filePath mode:ZipFileModeCreate];

        [self performSelectorOnMainThread:@selector(log:) withObject:@"Adding first file..." waitUntilDone:YES];
        
        ZipWriteStream *stream1= [zipFile writeFileInZipWithName:@"abc.txt" fileDate:[NSDate dateWithTimeIntervalSinceNow:-86400.0] compressionLevel:ZipCompressionLevelBest];

        [self performSelectorOnMainThread:@selector(log:) withObject:@"Writing to first file's stream..." waitUntilDone:YES];

        NSString *text= @"abc";
        [stream1 writeData:[text dataUsingEncoding:NSUTF8StringEncoding]];

        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing first file's stream..." waitUntilDone:YES];
        
        [stream1 finishedWriting];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Adding second file..." waitUntilDone:YES];
        
        ZipWriteStream *stream2= [zipFile writeFileInZipWithName:@"x/y/z/xyz.txt" compressionLevel:ZipCompressionLevelNone];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Writing to second file's stream..." waitUntilDone:YES];
        
        NSString *text2= @"XYZ";
        [stream2 writeData:[text2 dataUsingEncoding:NSUTF8StringEncoding]];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing second file's stream..." waitUntilDone:YES];
        
        [stream2 finishedWriting];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing zip file..." waitUntilDone:YES];
        
        [zipFile close];
        [zipFile release];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Opening zip file for reading..." waitUntilDone:YES];
        
        ZipFile *unzipFile= [[ZipFile alloc] initWithFileName:filePath mode:ZipFileModeUnzip];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Reading file infos..." waitUntilDone:YES];
        
        NSArray *infos= [unzipFile listFileInZipInfos];
        for (FileInZipInfo *info in infos) {
            NSString *fileInfo= [NSString stringWithFormat:@"- %@ %@ %d (%d)", info.name, info.date, info.size, info.level];
            [self performSelectorOnMainThread:@selector(log:) withObject:fileInfo waitUntilDone:YES];
        }
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Opening first file..." waitUntilDone:YES];
        
        [unzipFile goToFirstFileInZip];
        ZipReadStream *read1= [unzipFile readCurrentFileInZip];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Reading from first file's stream..." waitUntilDone:YES];
        
        NSMutableData *data1= [[[NSMutableData alloc] initWithLength:256] autorelease];
        int bytesRead1= [read1 readDataWithBuffer:data1];
        
        BOOL ok= NO;
        if (bytesRead1 == 3) {
            NSString *fileText1= [[[NSString alloc] initWithBytes:[data1 bytes] length:bytesRead1 encoding:NSUTF8StringEncoding] autorelease];
            if ([fileText1 isEqualToString:@"abc"])
                ok= YES;
        }
        
        if (ok)
            [self performSelectorOnMainThread:@selector(log:) withObject:@"Content of first file is OK" waitUntilDone:YES];
        else
            [self performSelectorOnMainThread:@selector(log:) withObject:@"Content of first file is WRONG" waitUntilDone:YES];
            
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing first file's stream..." waitUntilDone:YES];
        
        [read1 finishedReading];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Opening second file..." waitUntilDone:YES];

        [unzipFile goToNextFileInZip];
        ZipReadStream *read2= [unzipFile readCurrentFileInZip];

        [self performSelectorOnMainThread:@selector(log:) withObject:@"Reading from second file's stream..." waitUntilDone:YES];
        
        NSMutableData *data2= [[[NSMutableData alloc] initWithLength:256] autorelease];
        int bytesRead2= [read2 readDataWithBuffer:data2];
        
        ok= NO;
        if (bytesRead2 == 3) {
            NSString *fileText2= [[[NSString alloc] initWithBytes:[data2 bytes] length:bytesRead2 encoding:NSUTF8StringEncoding] autorelease];
            if ([fileText2 isEqualToString:@"XYZ"])
                ok= YES;
        }
        
        if (ok)
            [self performSelectorOnMainThread:@selector(log:) withObject:@"Content of second file is OK" waitUntilDone:YES];
        else
            [self performSelectorOnMainThread:@selector(log:) withObject:@"Content of second file is WRONG" waitUntilDone:YES];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing second file's stream..." waitUntilDone:YES];
        
        [read2 finishedReading];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Closing zip file..." waitUntilDone:YES];
        
        [unzipFile close];
        [unzipFile release];
        
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Test terminated succesfully" waitUntilDone:YES];
        
    } @catch (ZipException *ze) {
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Caught a ZipException (see logs), terminating..." waitUntilDone:YES];
        
        NSLog(@"ZipException caught: %d - %@", ze.error, [ze reason]);

    } @catch (id e) {
        [self performSelectorOnMainThread:@selector(log:) withObject:@"Caught a generic exception (see logs), terminating..." waitUntilDone:YES];

        NSLog(@"Exception caught: %@ - %@", [[e class] description], [e description]);
    }
    
    [pool drain];
}