IOS_49_使用objective-zip解压文件

1.从github上将objective-zip下载后,拖动到项目里,如图所示



2.控制器代码如下所示

//
// 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:@"abc.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


运行效果如下: