IOS_使用objective-zip解压文件

//
//  ViewController.m
//  tempOCZIP
//
//  Created by beyond on 2010/06/07.
//  Copyright © 2010年 beyond. All rights reserved.
//

#import "ViewController.h"

#import "Objective-Zip.h"

@interface ViewController ()

@end

@implementation ViewController

static int BUFFER_SIZE = 1024;
- (void)viewDidLoad {
    [super viewDidLoad];

    [self startUnZip];
}


- (void)startUnZip
{
    NSString *filePath = [[NSBundle mainBundle]pathForResource:@"vwhm.net.zip" ofType:nil];
    NSString *unzipPath = [self tempUnzipPathInDoc];
    NSLog(@"sg__%@",unzipPath);
    [self decompressFileFromPath:filePath toPath:unzipPath];
}

- (void)decompressFileFromPath:(NSString *)from toPath:(NSString *)to{
        @try {
            OZZipFile *unzipFile = [[OZZipFile alloc] initWithFileName:from mode:OZZipFileModeUnzip];
            
            　　//解压是否完成
            BOOL unzipFinished = NO;
            
            while (!unzipFinished) {
                
                　　　　//获取当前遍历到的文件信息
                OZFileInZipInfo *info = [unzipFile getCurrentFileInZipInfo];
                OZZipReadStream *stream = [unzipFile readCurrentFileInZip];
                NSMutableData *buffer = [[NSMutableData alloc] initWithLength:BUFFER_SIZE];
                
                // unzip files to the write path
                NSString *writePath = [to stringByAppendingPathComponent:info.name];
                if ([info.name hasSuffix:@"/"]) {
                    
                    　　　　//创建目录
                    
                    NSFileManager *fileManager = [NSFileManager defaultManager];
                    
                            [fileManager createDirectoryAtPath:writePath withIntermediateDirectories:YES attributes:nil error:nil];
//                    [MFFileToolkit createDrectoryIfNeeded:writePath];
                }else{
                    
                    　　　　//创建文件
                    NSFileManager *fileManager = [NSFileManager defaultManager];
                    [fileManager createFileAtPath:writePath contents:nil attributes:nil];
                    
//                    [MFFileToolkit createFilePath:writePath];
                    
                    //create fileHanderler to manage writing data to specified path, before writing data, move
                    //the cusor to the end of the file first.
                    NSFileHandle *fileHandler = [NSFileHandle fileHandleForWritingAtPath:writePath];
                    [buffer setLength:0];
                    
                    do {
                        [buffer setLength:BUFFER_SIZE];
                        int bytesRead = [stream readDataWithBuffer:buffer];
                        
                        
                        　　　　　　//每次读取BUFFER_SIZE大小的数据，如果读出的数据大小>0，就继续循环读取数据，
                        
                        　　　　　　//直到读到的数据大小<= 0时，退出循环，当前遍历的文件已解压完毕
                        if (bytesRead > 0) {
                            [buffer setLength:bytesRead];
                            [fileHandler seekToEndOfFile];
                            [fileHandler writeData:buffer];
                        }else{
                            break;
                        }
                    } while (YES);
                    
                    [fileHandler closeFile];
                }
                
                [stream finishedReading];
                buffer = nil;
                
                // Check if we should continue reading
                unzipFinished = ![unzipFile goToNextFileInZip];
            }
        }
        @catch (OZZipException *exception) {
            @throw exception;
        }
}


- (NSString *)tempUnzipPathInDoc
{
    NSString *path = [NSString stringWithFormat:@"%@/\%@",
                      NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0],
                      [NSUUID UUID].UUIDString];
    NSURL *url = [NSURL fileURLWithPath:path];
    NSError *error = nil;
    [[NSFileManager defaultManager] createDirectoryAtURL:url
                             withIntermediateDirectories:YES
                                              attributes:nil
                                                   error:&error];
    if (error) {
        return nil;
    }
    return url.path;
}

@end