iOS 数据压缩与解压

iOS  数据压缩与解压

Hi，推荐文件给你 "数据压缩与解压.zip"

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本文中需要的第三库在本文的代码例子中可以下载。minizip和ZipArchive这两个第三库

ViewController.h代码如下：

#import <UIKit/UIKit.h> #import "ZipArchive.h" @interface ViewController : UIViewController -(IBAction)compress:(id)sender; -(IBAction)unAr:(id)sender; @end

ViewController.m代码如下：

自己拖2个Button与如下两个方法相关联

//这方法中数据压缩的方法：

-(IBAction)compress:(id)sender { //导入ZipArchive包之后要加入libz.1.2.5.dylib的库 ZipArchive* zip = [[ZipArchive alloc] init]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentpath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil; NSString* zipfilePath = [documentpath stringByAppendingString:@"/dj.zip"] ; // NSLog(@"%@",zipfilePath); NSString* p_w_picpath2 = [[NSBundle mainBundle] pathForResource:@"xiaonan" ofType:@"jpg"]; NSString* p_w_picpath3 = [[NSBundle mainBundle] pathForResource:@"xiaonan" ofType:@"jpg"]; //创建压缩包 BOOL ret = [zip CreateZipFile2:zipfilePath]; //向压缩包内加入数据 ret = [zip addFileToZip:p_w_picpath2 newname:@"xiaonan.jpg"]; ret = [zip addFileToZip:p_w_picpath3 newname:@"p_w_picpath3.jpg"]; //关闭压缩包 [zip CloseZipFile2]; [zip release]; }

//数据解压的方法

-(IBAction)unAr:(id)sender { ZipArchive* zip = [[ZipArchive alloc] init]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentpath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil; NSString* l_zipfile = [documentpath stringByAppendingString:@"/dj.zip"] ; NSString* unzipto = [documentpath stringByAppendingString:@"/dj"] ; //找到需要解压文件的路径 if( [zip UnzipOpenFile:l_zipfile] ) { BOOL ret = [zip UnzipFileTo:unzipto overWrite:YES]; if( NO==ret ) { } //完成解压 [zip UnzipCloseFile]; } [zip release]; }