iOS 圆形图

- (PieChartData *)setData{




    double mult = 100;


    int count = 5;//饼状图总共有几块组成




    //每个区块的数据


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


    for (int i = 0; i < count; i++) {


        double randomVal = arc4random_uniform(mult + 1);


        BarChartDataEntry *entry = [[BarChartDataEntry alloc] initWithValue:randomVal xIndex:i];

[yVals addObject:entry];


    }




    //每个区块的名称或描述


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


    for (int i = 0; i < count; i++) {


        NSString *title = [NSString stringWithFormat:@"part%d", i+1];

[xVals addObject:title];


    }




    //dataSet


    PieChartDataSet *dataSet = [[PieChartDataSet alloc] initWithYVals:yVals label:@""];


    dataSet.drawValuesEnabled = YES;//是否绘制显示数据


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

[colors addObjectsFromArray:ChartColorTemplates.vordiplom];

[colors addObjectsFromArray:ChartColorTemplates.joyful];

[colors addObjectsFromArray:ChartColorTemplates.colorful];

[colors addObjectsFromArray:ChartColorTemplates.liberty];

[colors addObjectsFromArray:ChartColorTemplates.pastel];

[colors addObject:[UIColor colorWithRed:51/255.f green:181/255.f blue:229/255.f alpha:1.f]];


    dataSet.colors = colors;//区块颜色


    dataSet.sliceSpace = 3;//相邻区块之间的间距


    dataSet.selectionShift = 8;//选中区块时, 放大的半径


    dataSet.xValuePosition = PieChartValuePositionInsideSlice;//名称位置


    dataSet.yValuePosition = PieChartValuePositionOutsideSlice;//数据位置


    //数据与区块之间的用于指示的折线样式


    dataSet.valueLinePart1OffsetPercentage = 0.85;//折线中第一段起始位置相对于区块的偏移量, 数值越大, 折线距离区块越远


    dataSet.valueLinePart1Length = 0.5;//折线中第一段长度占比


    dataSet.valueLinePart2Length = 0.4;//折线中第二段长度最大占比


    dataSet.valueLineWidth = 1;//折线的粗细


    dataSet.valueLineColor = [UIColor brownColor];//折线颜色




    //data


    PieChartData *data = [[PieChartData alloc] initWithXVals:xVals dataSet:dataSet];


    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];


    formatter.numberStyle = NSNumberFormatterPercentStyle;


    formatter.maximumFractionDigits = 0;//小数位数


    formatter.multiplier = @1.f;

[data setValueFormatter:formatter];//设置显示数据格式

[data setValueTextColor:[UIColor brownColor]];

[data setValueFont:[UIFont systemFontOfSize:10]];




    return data;


}