如何在ios-charts中设置水平条形长度？

Question

我在github上使用了ios-charts项目，并使用了HorizontalCharts示例。它在示例中运行良好，但当我尝试设置水平条形值时，条形图太长了。示例在此处可见：

​

我的代码是：

-(void)setupChart{
myQuota = [[DataManager shared] myQuota];
[self setupBarLineChartView:_chartView];

_chartView.delegate = self;

_chartView.drawBarShadowEnabled = NO;
_chartView.drawValueAboveBarEnabled = YES;

_chartView.maxVisibleValueCount = 60;

ChartXAxis *xAxis = _chartView.xAxis;
xAxis.labelPosition = XAxisLabelPositionBottom;
xAxis.labelFont = [UIFont systemFontOfSize:10.f];
xAxis.drawAxisLineEnabled = YES;
xAxis.drawGridLinesEnabled = YES;
xAxis.gridLineWidth = .3;

ChartYAxis *leftAxis = _chartView.leftAxis;
leftAxis.labelFont = [UIFont systemFontOfSize:10.f];
leftAxis.drawAxisLineEnabled = YES;
leftAxis.drawGridLinesEnabled = YES;
leftAxis.drawLabelsEnabled = NO; 
leftAxis.gridLineWidth = .3;
leftAxis.axisMinValue = 0.0; 

ChartYAxis *rightAxis = _chartView.rightAxis;
rightAxis.enabled = YES;
rightAxis.labelFont = [UIFont systemFontOfSize:10.f];

rightAxis.drawAxisLineEnabled = YES;
rightAxis.drawGridLinesEnabled = NO;
rightAxis.axisMinValue = 0.0; 
rightAxis.yOffset = 1.0;
rightAxis.axisMaxValue = [myQuota.quota doubleValue]; // here is 10

_chartView.doubleTapToZoomEnabled = NO;
_chartView.highlightPerTapEnabled = NO;
_chartView.legend.enabled = NO;

[_chartView animateWithYAxisDuration:2.5];
[self updateChartData];
}

- (void)updateChartData
{
if (self.shouldHideData)
{
    _chartView.data = nil;
    return;
}

if(myQuota != nil && myQuota.quota != nil)
{
    [self setDataCount:(1) range: [myQuota.quota doubleValue]];
}

}

- (void)setDataCount:(int)count range:(double)range
{
NSMutableArray *xVals = [[NSMutableArray alloc] init];
[xVals addObject:myQuota.rowName];

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

double val = [myQuota.quotaReached doubleValue];  // here is 2
[yVals addObject:[[BarChartDataEntry alloc] initWithValue:val xIndex:0]];

BarChartDataSet *set1 = nil;
if (_chartView.data.dataSetCount > 0)
{
    set1 = (BarChartDataSet *)_chartView.data.dataSets[0];
    set1.yVals = yVals;
    _chartView.data.xValsObjc = xVals;
    [_chartView notifyDataSetChanged];
}
else
{
    set1 = [[BarChartDataSet alloc] initWithYVals:yVals label:@""];
    set1.barSpace = 0.35;
    set1.colors = [NSArray arrayWithObjects:[UIColor greenColor], nil]; 

    NSMutableArray *dataSets = [[NSMutableArray alloc] init];
    [dataSets addObject:set1];

    BarChartData *data = [[BarChartData alloc] initWithXVals:xVals     dataSets:dataSets];
    [data setValueFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:10.f]];

    _chartView.data = data;
}
}

为什么酒吧这么长？

Answer 1

好吧，既然没人给出答案我就试着破解了。我添加了一个不可见的条形图/行，并将其值设置为条形图的最大值。这样，即使条形图不可见，轴也会显示最大值。

我欢迎任何知道更好方法的人，但在那之前，我会这样做：

- (void)setDataCount:(int)count range:(double)range{

MY_MAX_VALUE = 10; // put HERE your MAX value for the axis

NSMutableArray *xVals = [[NSMutableArray alloc] init];
[xVals addObject:myQuota.rowName];

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

double val = [myQuota.quotaReached doubleValue];  // here is 2
[yVals addObject:[[BarChartDataEntry alloc] initWithValue:val xIndex:0]];
[yVals addObject:[[BarChartDataEntry alloc] initWithValue: MY_MAX_VALUE xIndex:1]];
}