iOS 數據壓縮與解壓

iOS  數據壓縮與解壓

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本文中需要的第三庫在本文的代碼例子中可以下載。minizip和ZipArchive這兩個第三庫

ViewController.h代碼如下：

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

ViewController.m代碼如下：

自己拖2個Button與如下兩個方法相關聯

//這方法中數據壓縮的方法：

-(IBAction)compress:(id)sender
{
    //導入ZipArchive包之后要加入libz.1.2.5.dylib的庫
    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"];
                     
                     
    //創建壓縮包
    BOOL ret = [zip CreateZipFile2:zipfilePath];
    //向壓縮包內加入數據
    ret = [zip addFileToZip:p_w_picpath2 newname:@"xiaonan.jpg"];
    ret = [zip addFileToZip:p_w_picpath3 newname:@"p_w_picpath3.jpg"];
    //關閉壓縮包
    [zip CloseZipFile2];
                     
                     
    [zip release];
}

//數據解壓的方法

-(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"] ;
         
         
    //找到需要解壓文件的路徑
    if( [zip UnzipOpenFile:l_zipfile] )
    {
        BOOL ret = [zip UnzipFileTo:unzipto overWrite:YES];
        if( NO==ret )
        {
        }
        //完成解壓
        [zip UnzipCloseFile];
    } 
    [zip release];
}