压缩文件：
ZipArchive *zip = [[ZipArchive alloc] init]; NSString *sZipPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/test.zip"]; NSString *img1Path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/img1.jpg"] ; NSString* img2Path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/img2.jpg"] ; BOOL bRet = [zip CreateZipFile2:sZipPath]; bRet = [zip addFileToZip:img1Path newname:@"img1.jpg"]; bRet = [zip addFileToZip:img2Path newname:@"img2.jpg"]; [zip CloseZipFile2]; [zip release]; Z
