ios - 解压缩文件进度在 block 内不起作用

Question

目前我正在使用 https://github.com/mattconnolly/ZipArchive解压缩压缩文件夹的库。它工作正常，但我还想显示它的解压缩进度。我正在使用 ZipArchiveProgressUpdateBlock 获得解压缩进度，但进度条未显示进度。检查下面的代码:

ZipArchive *zip = [[ZipArchive alloc] init];

    self.progressBarDownload.progress = 0;

    self.lblProgress.text = @"Wait unzipping file";

    ZipArchiveProgressUpdateBlock progressBlock = ^ (int percentage, int filesProcessed, int numFiles) {
        NSLog(@"total %d, filesProcessed %d of %d", percentage, filesProcessed, numFiles);
            self.progressBarDownload.progress = filesProcessed / numFiles;
            if(filesProcessed==numFiles)
                self.lblProgress.text = @"Done";
    };

    zip.progressBlock = progressBlock;

    //open file
    [zip UnzipOpenFile:path];

    //unzip file to
    [zip UnzipFileTo:[dirArray objectAtIndex:0] overWrite:YES];

到目前为止我尝试了什么:

我也尝试将进度条 ui 更改放在主线程中，但它仍然无法正常工作

ZipArchiveProgressUpdateBlock progressBlock = ^ (int percentage, int filesProcessed, int numFiles) {
        NSLog(@"total %d, filesProcessed %d of %d", percentage, filesProcessed, numFiles);
        dispatch_sync(dispatch_get_main_queue(), ^{
            //Your code goes in here
            NSLog(@"Main Thread Code");
            self.progressBarDownload.progress = filesProcessed / (float)numFiles;
            if(filesProcessed==numFiles)
                self.lblProgress.text = @"Done";
        });
    };

Answer 1

尝试将解压缩代码放在后台 GCD 线程上。