如何在条形图数据上设置 x 轴 - ios-charts？

以前我们可以设置条形图数据的 x 轴，如下所示：-

BarChartData *data = [[BarChartData alloc] initWithXVals:xvals dataSets:dataSets];

在最新更新的ios-charts库，语法更改为以下：-BarChartData *data = [[BarChartData alloc] initWithDataSets:dataSets];

如何设置x轴BarChartData?

借助这个答案（快速版本），我能够在条形图上显示 xAxis 字符串值Objective-C.

NSMutableArray *xValsDietArray;

设置您的图表数据。基本示例如下：-

for (int i=0; i<dietArray.count; i++) {
    DietInput *obj = [dietArray objectAtIndex:i];
    NSString *dateStr = @"Jan";
    [xValsDietArray addObject:dateStr];//Maintain this xValsDietArray. It will be used later on while setting x values. This contains array of x-axis values
    [yvals addObject:[[BarChartDataEntry alloc]initWithX:[[xValsDietArray objectAtIndex:i] doubleValue] y:obj.calorieInput.doubleValue data:xValsDietArray] ];
}

BarChartDataSet *set1 = [[BarChartDataSet alloc] initWithValues:yvals label:@"Water Consumed"];
NSMutableArray *dataSets = [[NSMutableArray alloc] init];
[dataSets addObject:set1];
BarChartData *data = [[BarChartData alloc] initWithDataSets:dataSets];
cell.chartView.data=data;
cell.chartView.xAxis.valueFormatter = self;// Set the delegate to self. THIS IS THE MAIN ADDITION IN NEW CHART LIBRARY

实施stringForValue委托方法如下：-

- (NSString * _Nonnull)stringForValue:(double)value axis:(ChartAxisBase * _Nullable)axis
{
    NSString *xAxisStringValue = @"";
    int myInt = (int)value;

    if(xValsDietArray.count > myInt)
        xAxisStringValue = [xValsDietArray objectAtIndex:myInt];

    return xAxisStringValue;
}