Qt每天一例16.QString字符串截取

Posted 2022-01-24 鱼酱2333

• mid截取
• chop砍掉
• left 左截取
• right右截取

void demo10()

    QString str1 = "helloworld";

    //从位置2开始截取，截取3个字符
    QString str2 = str1.mid(2, 3);//"llo"
    
    //从位置3开始截取，截取到最后
    QString str3 = str1.mid(3);//"loworld"
    
    //左边开始1个
    QString str4 = str1.left(1);//"h"
    //右边开始1个
    QString str5 = str1.right(1);//"d"
    
    //前3个
    QString str6 = str1.first(3);//"hel"
    
    //删除末尾2个
    QString str7;
    str7.chop(2);
    qDebug()<< str7;//"hello wor"