QT 实现图表显示--QChart

1.首先在工程文件.pro 中添加

QT       += charts

2.添加头文件

#include <QChartView>
#include <QtCharts>

3.在ui文件中添加 QChartView控件  命名chartViewLearnProcess

4.代码 

void MainForm::init_learnProcess_chart()
{
    QChart *chart = new QChart();
    chart->setTitle("学习进度展示");  //标题
    chart->setAnimationOptions(QChart::SeriesAnimations);//图表中的图形序列将以动画方式显示
    ui->chartViewLearnProcess->setChart(chart);
    ui->chartViewLearnProcess->setRenderHint(QPainter::Antialiasing);
}

//建立图表 内容
void MainForm::build_learnProcess_chart()
{
    QChart *chart = ui->chartViewLearnProcess->chart();
    chart->removeAllSeries();
    if(chart->axisX() != NULL)
        chart->removeAxis(chart->axisX());
    if(chart->axisY() != NULL)
        chart->removeAxis(chart->axisY());

    int count=login_group->listAllMember.count();
  &n