图片压缩/解压成Zip文件

本文介绍如何将图片压缩成Zip文件，首先需要下载第三方库ZipArchive 并导入项目中。

ZipArchive 库地址：https://github.com/mattconnolly/ZipArchive

一、文档结构：

二、准备工作：

1、框架导入：

2、ZipArchive.m文件使用非ARC机制

三、代码示例：

//
// ViewController.m
//  UnzipImgDemo
//
//  Created byLotheve on 15/4/10.
//  Copyright (c)2015年 Lotheve. All rights reserved.
//

#import "ViewController.h"
#import "ZipArchive.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imgView;

@property (weak, nonatomic) IBOutlet UIButton *zipBtn;
@property (weak, nonatomic) IBOutlet UIButton *unzipBtn;
@property (weak, nonatomic) IBOutlet UIButton *zipFileDeBtn;
@property (weak, nonatomic) IBOutlet UIButton *zipedFiledeBtn;

@property (weak, nonatomic) IBOutlet UILabel *statusLabel;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self downLoadImg];
}

//加载图片到本地
- (void)downLoadImg{
    NSString *URLString = @"https://www.baidu.com/img/bdlogo.png";
    NSURL *URL = [NSURL URLWithString:URLString];
    NSData *data = [NSData dataWithContentsOfURL:URL];

    NSMutableString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject];;
    NSString *imgPath = [path stringByAppendingPathComponent:@"baidu.png"];
    [data writeToFile:imgPath atomically:YES];
}

//压缩文件
- (IBAction)zipFile:(id)sender {
    NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject];

    NSString *imgPath = [cachesPath stringByAppendingPathComponent:@"baidu.png"];
    NSString *zipFilePath = [docsPath stringByAppendingPathComponent:@"newZipFile.zip"];

    //实例化一个压缩文档，并创建文件
    ZipArchive *za = [[ZipArchive alloc]init];
    [za CreateZipFile2:zipFilePath];
    //在压缩文档中添加文件
    [za addFileToZip:imgPath newname:@"baidu_zipped.png"];
    //关闭zip文件操作
    BOOL success = [za CloseZipFile2];
    if (success) {
        _statusLabel.text = @"压缩成功";
    }else{
        _statusLabel.text = @"压缩失败";
    }
}

//解压文件
- (IBAction)unzipFile:(id)sender {
    NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *zipPath = [docsPath stringByAppendingPathComponent:@"newZipFile.zip"];
    ZipArchive *za = [[ZipArchive alloc]init];
    //在内存中解压文件
    if ([za UnzipOpenFile:zipPath]) {
        //将解压的内容写到磁盘中
        BOOL success = [za UnzipFileTo:docsPath overWrite:YES];
        if (!success) {
            _statusLabel.text = @"解压失败";
        }else{
            //关闭压缩文件
            [za UnzipCloseFile];
            _statusLabel.text = @"解压成功";
            NSString *imgPath = [docsPath stringByAppendingPathComponent:@"baidu_zipped.png"];
            NSData *data = [NSData dataWithContentsOfFile:imgPath];
            UIImage *image = [UIImage imageWithData:data];
            _imgView.image = image;
        }
    }else{
        _statusLabel.text = @"压缩文件不存在";
    }
}

//删除压缩文件
- (IBAction)deleteZipFile:(id)sender {
    NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *zipPath = [docsPath stringByAppendingPathComponent:@"newZipFile.zip"];
    //创建文件管理器
    NSFileManager *fm = [NSFileManager defaultManager];
    //判断指定路径文件是否存在
    BOOL exist = [fm fileExistsAtPath:zipPath];
    if (exist) {
        NSError *error = nil;
        [fm removeItemAtPath:zipPath error:&error];
        if (!error) {
            _statusLabel.text = @"删除压缩文件成功";
        }else{
            _statusLabel.text = @"删除压缩文件失败";
        }
    }else{
        _statusLabel.text = @"文件不存在";
    }
}

//删除解压文件
- (IBAction)deleteZipedFile:(id)sender {
    NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *zippedFilePath = [docsPathstringByAppendingPathComponent:@"baidu_zipped.png"];

    NSFileManager *fm = [NSFileManager defaultManager];
    BOOL exist = [fm fileExistsAtPath:zippedFilePath];
    if (exist) {
        NSError *error = nil;
        [fm removeItemAtPath:zippedFilePath error:&error];
        if (!error) {
            _statusLabel.text = @"删除解压文件成功";
            _imgView.image = nil;
        }else{
            _statusLabel.text = @"删除解压文件失败";
        }
    }else{
        _statusLabel.text = @"文件不存在";
    }
}

@end

四：效果演示

点击压缩按钮：

点击解压按钮：

删除按钮：

附：文件请在沙盒中自行查看