将QString转化为float:
QString data;
float num = data.toFloat();
将float转化为QString:
tab_reg[0] = 65524;
float PT1 = static_cast<float>(tab_reg[0])/10.0;
QString PT1Str = QString("%1").arg(PT1);
输出结果是:float is 6552.4
float num = 1.222;
QString data = QString("float is %1").arg(num);
输出结果是:float is 1.222