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iOS 圆形图

片段代码如下,全部代码请到文章末尾下载demo源码
- (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;

}

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