Question

我正在通过下载视频开发应用。当我下载第一个索引视频时，它的工作正常。但是除了这个视频我正在下载。它崩溃了。我的错误显示是：

＆＃39; NSRangeException＆＃39;，原因：＆＃39; * - [__ NSArrayM objectAtIndex：]：索引1超出界限[0 .. 0]＆＃39;＆＃34; *

     -(void)clickbtn:(id)sender{

        btnTag =[sender tag];
         NSLog(@"%d",btnTag);

        NSLog(@"tag number is = %ld",(long)[sender tag]);

        NSString *vedioUrl =[[allData objectAtIndex:btnTag]valueForKey:@"video"];
        NSLog(@"%@",vedioUrl);
       NSString *encodeUrl = [vedioUrl stringByAddingPercentEscapesUsingEncoding:
                             NSASCIIStringEncoding];
        NSLog(@"%@",encodeUrl);


          NSURL *url = [NSURL URLWithString:encodeUrl];
        NSLog(@"%@",url);
        self.downloadManager = [[DownloadManager alloc] initWithDelegate:self];
        self.downloadManager.maxConcurrentDownloads = 4;
        [self.downloadManager addDownloadWithFilename:downloadFilename URL:url];



        self.startDate = [NSDate date];
        [self.downloadManager start];

         UIButton *button1 = (UIButton*)sender;
        NSLog(@"%@",button1);
        CGPoint buttonPosition = [sender convertPoint:CGPointZero
                                               toView:self.Table];

        NSIndexPath *clickedIP = [self.Table indexPathForRowAtPoint:buttonPosition];
        NSLog(@"%@",clickedIP);

        DownloadCell *cell = (DownloadCell *) [self.Table cellForRowAtIndexPath:clickedIP];
        NSLog(@"%@",cell);



        Download *download = self.downloadManager.downloads[clickedIP.row];

        NSLog(@"%@",download);

           if (download.isDownloading)

        {

           [self updateProgressViewForIndexPath:clickedIP download:download];
        }
        else

         {
                 cell.progressView.hidden = YES;
        }
    }

Answer 1

您正在尝试从数组中获取值，该值仅包含0 index处的一个值或该特定数组已为空。当您尝试从table-view中选择第二个单元格时，尝试从index 1的数组中获取值。但实际上在数组中index 1没有任何值。这就是你的应用程序崩溃的原因。

请先使用 NSLog 验证您的阵列是否已根据您的要求完全填充。

应用程序正在崩溃。当我从自定义表格单元格下载第二个视频索引时

1 个答案: