How to adjust RadarChartView text from the bottom of the height？

[githubkiven]

I set the cell height to 240，I set the RadarChartView height to 240，But there is a blank at the bottom，I want to keep the bottom of the pitch smaller，How should i set it up?thank you very much

[githubkiven]

I want the effect

[liuxuan30]

use extraBottomOffset should help
But I suggest you look at how the blank is calcuated, either if it's in legend offset, or just the contentRect offset

[githubkiven]

        self.radarChartView = [PPWUtils radarChartView];
        self.radarChartView.backgroundColor = [UIColor orangeColor];
        [self.radarChartView setDrawMarkers:YES];
        self.radarChartView.frame = CGRectMake(20, 0, kScreenWidth-40, 246);
        [self.contentView addSubview:self.radarChartView];
        self.radarChartView.delegate = self;

[githubkiven]

I just set the size of the radarChartView, the bottom of the blank so much @liuxuan30