BUG: Pie chart labels: using .format causes connector lines to disappear

[skuske]

With one of the latest releases a problem with pie chart labels has been introduced. When using HIDataLabels for a pie chart in combination with the format property, all connector lines disappear:

If I comment out the format property, the chart does not draw at all. If I remove the HIDataLabels everything is fine and connector lines show up. See second screenshot below.

Code:

    HIChartView *chartView = [[HIChartView alloc] initWithFrame:self.view.bounds];
    
    HIOptions *options = [[HIOptions alloc]init];
    
    HIChart *chart = [[HIChart alloc]init];
    chart.type = @"pie";
    chart.options3d = [[HIOptions3d alloc]init];
    chart.options3d.enabled = [[NSNumber alloc] initWithBool:true];
    chart.options3d.alpha = @45;
    
    HITitle *title = [[HITitle alloc]init];
    title.text = @"Contents of Highsoft's weekly fruit delivery";
    
    HISubtitle *subtitle = [[HISubtitle alloc]init];
    subtitle.text = @"3D donut in Highcharts";
    
    HIPlotOptions *plotoptions = [[HIPlotOptions alloc]init];
    plotoptions.pie = [[HIPie alloc]init];
    plotoptions.pie.innerSize = @100;
    plotoptions.pie.depth = @45;
    
    HIDataLabels *dataLabels = [[HIDataLabels alloc] init];
    dataLabels.enabled=[[NSNumber alloc] initWithBool:true];
    dataLabels.align = @"right";
    dataLabels.format = @"<b>{point.name}</b>";
    dataLabels.style = [[HIStyle alloc] init];
    dataLabels.style.fontSize = @10;
        
    plotoptions.pie.dataLabels = [NSArray arrayWithObjects:dataLabels,nil];
    
    HIPie *pie = [[HIPie alloc]init];
    pie.name = @"Delivered amount";
    pie.data = [NSMutableArray arrayWithObjects:@[
                                                  @"Bananas",
                                                  @8
                                                  ],
                @[
                  @"Kiwi",
                  @3
                  ],
                @[
                  @"Mixed nuts",
                  @1
                  ],
                @[
                  @"Oranges",
                  @6
                  ],
                @[
                  @"Apples",
                  @8
                  ],
                @[
                  @"Pears",
                  @4
                  ],
                @[
                  @"Clementines",
                  @4
                  ],
                @[
                  @"Reddish (bag)",
                  @1
                  ],
                @[
                  @"Grapes (bunch)",
                  @1
                  ], nil];
    
    options.chart = chart;
    options.title = title;
    options.subtitle = subtitle;
    options.plotOptions = plotoptions;
    options.series = [NSMutableArray arrayWithObjects: pie, nil];
    
    chartView.options = options;
    
    [self.view addSubview:chartView];

No HIDataLabels:

I need a solution for the most recent release that fixes the problem where the usage of HIDataLabels in combination with the format property removes all connector lines. Please note that the iOS sample at https://www.highcharts.com/demo/ios/pie-gradient also no longer works.

[skuske]

Update:

Using

`plotOptions.series.dataLabels = [NSArray arrayWithObjects:dataLabels,nil];`

instead of

`plotOptions.pie.dataLabels = [NSArray arrayWithObjects:dataLabels,nil];`

seems to fix the issue.

That means that plotOptions.pie.dataLabels is somewhat buggy ...