我正在尝试找出一种方法来显示当前进度以及解压缩并将 zip 文件的内容写入磁盘的剩余时间。我目前正在使用此处找到的 ZipArchiver 类http://code.google.com/p/ziparchive/ http://code.google.com/p/ziparchive/效果很好。问题是,其中很多都是用 C++ 编写的,我对此没有太多经验。以下是相关函数:
-(BOOL) UnzipFileTo:(NSString*) path overWrite:(BOOL) overwrite
{
BOOL success = YES;
int ret = unzGoToFirstFile( _unzFile );
unsigned char buffer[4096] = {0};
NSFileManager* fman = [NSFileManager defaultManager];
if( ret!=UNZ_OK )
{
[self OutputErrorMessage:@"Failed"];
}
do{
if( [_password length]==0 )
ret = unzOpenCurrentFile( _unzFile );
else
ret = unzOpenCurrentFilePassword( _unzFile, [_password cStringUsingEncoding:NSASCIIStringEncoding] );
if( ret!=UNZ_OK )
{
[self OutputErrorMessage:@"Error occurs"];
success = NO;
break;
}
// reading data and write to file
int read ;
unz_file_info fileInfo ={0};
ret = unzGetCurrentFileInfo(_unzFile, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if( ret!=UNZ_OK )
{
[self OutputErrorMessage:@"Error occurs while getting file info"];
success = NO;
unzCloseCurrentFile( _unzFile );
break;
}
char* filename = (char*) malloc( fileInfo.size_filename +1 );
unzGetCurrentFileInfo(_unzFile, &fileInfo, filename, fileInfo.size_filename + 1, NULL, 0, NULL, 0);
filename[fileInfo.size_filename] = '\0';
// check if it contains directory
NSString * strPath = [NSString stringWithCString:filename];
BOOL isDirectory = NO;
if( filename[fileInfo.size_filename-1]=='/' || filename[fileInfo.size_filename-1]=='\\')
isDirectory = YES;
free( filename );
if( [strPath rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"/\\"]].location!=NSNotFound )
{// contains a path
strPath = [strPath stringByReplacingOccurrencesOfString:@"\\" withString:@"/"];
}
NSString* fullPath = [path stringByAppendingPathComponent:strPath];
if( isDirectory )
[fman createDirectoryAtPath:fullPath withIntermediateDirectories:YES attributes:nil error:nil];
else
[fman createDirectoryAtPath:[fullPath stringByDeletingLastPathComponent] withIntermediateDirectories:YES attributes:nil error:nil];
if( [fman fileExistsAtPath:fullPath] && !isDirectory && !overwrite )
{
if( ![self OverWrite:fullPath] )
{
unzCloseCurrentFile( _unzFile );
ret = unzGoToNextFile( _unzFile );
continue;
}
}
FILE* fp = fopen( (const char*)[fullPath UTF8String], "wb");
while( fp )
{
read=unzReadCurrentFile(_unzFile, buffer, 4096);
if( read > 0 )
{
fwrite(buffer, read, 1, fp );
}
else if( read<0 )
{
[self OutputErrorMessage:@"Failed to reading zip file"];
break;
}
else
break;
}
if( fp )
{
fclose( fp );
// set the orignal datetime property
NSDate* orgDate = nil;
//{{ thanks to brad.eaton for the solution
NSDateComponents *dc = [[NSDateComponents alloc] init];
dc.second = fileInfo.tmu_date.tm_sec;
dc.minute = fileInfo.tmu_date.tm_min;
dc.hour = fileInfo.tmu_date.tm_hour;
dc.day = fileInfo.tmu_date.tm_mday;
dc.month = fileInfo.tmu_date.tm_mon+1;
dc.year = fileInfo.tmu_date.tm_year;
NSCalendar *gregorian = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
orgDate = [gregorian dateFromComponents:dc] ;
[dc release];
[gregorian release];
//}}
NSDictionary* attr = [NSDictionary dictionaryWithObject:orgDate forKey:NSFileModificationDate]; //[[NSFileManager defaultManager] fileAttributesAtPath:fullPath traverseLink:YES];
if( attr )
{
// [attr setValue:orgDate forKey:NSFileCreationDate];
if( ![[NSFileManager defaultManager] setAttributes:attr ofItemAtPath:fullPath error:nil] )
{
// cann't set attributes
NSLog(@"Failed to set attributes");
}
}
}
unzCloseCurrentFile( _unzFile );
ret = unzGoToNextFile( _unzFile );
}while( ret==UNZ_OK && UNZ_OK!=UNZ_END_OF_LIST_OF_FILE );
return success;
}
我很难弄清楚如何插入一些代码,让我显示当前的百分比进度以及解压缩并将所有文件写入磁盘的剩余时间。关于我如何实现这一目标有什么想法吗?
thx