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iOS中下载压缩包并解压

iOS中下载压缩包并解压

作者: 哈哈大p孩 | 来源:发表于2017-03-15 13:54 被阅读564次

    总结一下之前项目用到的知识点,关于下载的文件是压缩包,我们下载到本地后,用SSZipArchive这个第三方进行解压,然后将解压后的文件放到指定目录下,再进行操作。详细代码如下:

    - (void)createProgress {
        //[NSString stringWithFormat:@"%@%@",DOWNLOADZHENGSHUURL,@"1097449557765533696489"]
        NSURL *URL = [NSURL URLWithString:_downloadUrl];
        
        NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
        
        //AFN3.0+基于封住URLSession的句柄
        AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
        
        //请求
        NSURLRequest *request = [NSURLRequest requestWithURL:URL];
        [MBProgressHUD showMessage:nil toView:self.view];
        //下载Task操作
        _downloadTask = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
            if (downloadProgress) {
                JJLog(@"123");
            }
            // @property int64_t totalUnitCount;  需要下载文件的总大小
            // @property int64_t completedUnitCount; 当前已经下载的大小
            
            // 给Progress添加监听 KVO
            JJLog(@"这个进度为%f",1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount);
            // 回到主队列刷新UI
            dispatch_async(dispatch_get_main_queue(), ^{
                self.progressView.progress = 1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount;
                _titlelabel.text = [NSString stringWithFormat:@"当前进度为:%.2f%%",(1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount) * 100];
            });
            
        } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
            
            //- block的返回值, 要求返回一个URL, 返回的这个URL就是文件的位置的路径
            
            NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
            JJLog(@"tttss == %@", cachesPath);
            NSString *path = [cachesPath stringByAppendingPathComponent:response.suggestedFilename];
            return [NSURL fileURLWithPath:path];
            
        } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
            // filePath就是你下载文件的位置,你可以解压,也可以直接拿来使用
            [MBProgressHUD hideHUDForView:self.view];
            NSString *imgFilePath = [filePath path];// 将NSURL转成NSString
            //        UIImage *img = [UIImage imageWithContentsOfFile:imgFilePath];
            JJLog(@"img == %@", imgFilePath);
            NSString *zipPath = imgFilePath;
            //获取沙盒doucument路径
            NSArray*pathsss =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
            NSString *documentsDirectory = [pathsss objectAtIndex:0];
            NSFileManager *fileManager = [NSFileManager defaultManager];
            NSString*testDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"];
            //删除
            [[NSFileManager defaultManager] removeItemAtPath:testDirectory error:nil];
            [fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];
            JJLog(@"test == %@",testDirectory); //解压后的路径
            
            
            
            //解压
            [SSZipArchive unzipFileAtPath:zipPath toDestination:testDirectory];
            NSArray *filename = [Tool getFilenamelistOfType:@"pdf" fromDirPath:testDirectory];
            NSArray *fileArray;
            if (filename.count > 0) {
                NSString *stringOne = [testDirectory stringByAppendingString:[NSString stringWithFormat:@"/%@",filename[0]]];
                NSString *stringTwo = [testDirectory stringByAppendingString:[NSString stringWithFormat:@"/%@",filename[1]]];
                JJLog(@"stringone == %@", stringOne);
                fileArray = @[stringOne,stringTwo];
            }
            if (filename.count > 0) {
                _downloadView = [[DownloadView alloc] initWithFrame:self.view.frame NSArray:fileArray];
                [self.view addSubview:_downloadView];
                __weak typeof(self) weakSelf = self;
                _downloadView.delegate = self;
                _downloadView.cancelBtn = ^() {
                    [weakSelf.downloadView removeFromSuperview];
                    _downloadView = nil;
                };
                
            } else {
    //          [self cancelDownload];
                [Tool HUDShowAddedTo:self.view withTitle:@"下载失败" delay:1.5];
            }
        }];
        [_downloadTask resume];
    }
    

    点击获取SSZipArchive地址。
    最后祝大家工作愉快~

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