ios-charts雷达图表关闭自动缩放

Question

这两个雷达图表具有相同的橙色位数据点，但灰色不同。但是，正如您所看到的那样，它是自动缩放的，并且橙色位在第二个图表上变得更大，即使它们是完全相同的数据点。有没有办法关闭自动缩放功能？我希望100％也可以直接进入图表的边缘。

-(void)setupRadarChart
{
    self.radarChart.descriptionText = @"";
    self.radarChart.webLineWidth = .75;
    self.radarChart.innerWebLineWidth = 0.375;
    self.radarChart.webAlpha = 1.0;
    self.radarChart.userInteractionEnabled = NO;
    self.radarChart.xAxis.enabled = YES;
    ChartYAxis *yAxis = self.radarChart.yAxis;
    yAxis.enabled = NO;
    ChartLegend *l = self.radarChart.legend;
    l.position = ChartLegendPositionBelowChartLeft;
    l.font = [UIFont systemFontOfSize:UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ? 12 : (headerWidth/40)];
    [self setRadarData];
}

- (void)setRadarData
{
    NSMutableArray *parties = [[NSMutableArray alloc] init];
    for (PillarModel *m in [DataManager sharedData].pillars)
    {
        [parties addObject:m.abbreviation];
    }
    NSMutableArray *yVals2 = [[NSMutableArray alloc] init];
    NSMutableArray *benchMark = [[NSMutableArray alloc] init];
    BOOL shouldAdd = YES;

    for (PillarModel *pillar in [DataManager sharedData].pillars)
    {    int totalPillarScore = (int)[[DataManager sharedData] getTotalScorePossible:[[DataManager sharedData] getIndividualQuestionResultsForPillar:pillar.pillarId]];
        if ((isCompany ? [[DataManager sharedData] getCompanyScoresForCategory:pillar] : [[DataManager sharedData] getIndividualScoreForCategory:pillar.pillarId]) != 0)
        {
            shouldAdd = NO;
        }
        if (pillar.pillarId == numberOfPillars -1 && shouldAdd) {
            [yVals2 addObject:[[ChartDataEntry alloc] initWithValue:0.01 xIndex:pillar.pillarId]];

        }
        else{
            double val = (isCompany ? (double)[[DataManager sharedData] getCompanyScoresForCategory:pillar]/totalPillarScore                                                                                : (double)[[DataManager sharedData] getIndividualScoreForCategory:pillar.pillarId] / totalPillarScore);
            [yVals2 addObject:[[ChartDataEntry alloc] initWithValue:val xIndex:pillar.pillarId]];
        }
        float pillarBenchMark = [[[[[DataManager sharedData].benchmarkJSONDict objectForKey:hightlightedView.lowercaseString] objectForKey:pillar.title] objectForKey:@"pillar"] intValue];
        float ifNoBenchMarkThanCompanyScore = (pillarBenchMark ? pillarBenchMark : (isCompany ? [[DataManager sharedData] getIndividualScoreForCategory:pillar.pillarId]: [[DataManager sharedData] getCompanyScoresForCategory:pillar]));
        [benchMark addObject:[[ChartDataEntry alloc] initWithValue:ifNoBenchMarkThanCompanyScore/totalPillarScore xIndex:pillar.pillarId]];
    }

    NSMutableArray *xVals = [[NSMutableArray alloc] init];

    for (int i = 0; i < numberOfPillars; i++)
    {
        [xVals addObject:parties[i % parties.count]];
    }

    NSString *label = (isCompany ? @"Company score" : @"Your score");
    RadarChartDataSet *set2 = [[RadarChartDataSet alloc] initWithYVals:yVals2 label:label];
    [set2 setColor:[DataManager sharedData].mainColor];
    set2.drawFilledEnabled = YES;
    set2.fillAlpha = 1.0f;
    set2.lineWidth = 2.0;

    RadarChartDataSet *benchMarkSet = [[RadarChartDataSet alloc] initWithYVals:benchMark label:@"Benchmark"];
    [benchMarkSet setColor:[UIColor colorWithRed:125/255.0f green:125/255.0f blue:125/255.0f alpha:0.6f]];
    benchMarkSet.drawFilledEnabled = YES;
    benchMarkSet.fillAlpha = 0.0f;
    benchMarkSet.lineWidth = 2.0;
    benchMarkSet.highlightLineDashLengths = @[[NSNumber numberWithInt:2]];
    benchMarkSet.highlightLineDashPhase = 2;

    RadarChartData *data = [[RadarChartData alloc] initWithXVals:xVals dataSets:@[set2, benchMarkSet]];
    [data setValueFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:8.f]];
    [data setDrawValues:NO];

    self.radarChart.data = data;
}

Answer 1

孙博弘发布的答案并不正确，但这让我意识到这是多么容易解决。这解决了自动缩放问题，现在也到了边缘。

self.radarChart.yAxis.customAxisMin = 0;
self.radarChart.yAxis.customAxisMax = 1;

Answer 2

我担心您在使用内部访问级别时直接使用customAxisMax。https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/AccessControl.html

/// Flag indicating that the axis-max value has been customized
internal var _customAxisMax: Bool = false

相反，您可以使用axisMaxValue来控制它。

/// The maximum value for this axis.
/// If set, this value will not be calculated automatically depending on the provided data.
/// Use `resetCustomAxisMin()` to undo this.
public var axisMaxValue: Double
{
    get
    {
        return _axisMaximum
    }
    set
    {
        _customAxisMax = true
        _axisMaximum = newValue
    }
}

// 2016-06-12更新

public var factor: CGFloat
{
    let content = _viewPortHandler.contentRect
    return min(content.width / 2.0, content.height / 2.0)
            / CGFloat(_yAxis.axisRange)
}

RadarChartView会计算factor将值转换为像素。

也许，您可以使用axisMinValue和axisMaxValue来控制自动缩放。