获取字符在字符串中的位置
QString str = "AT+LOC+LOCATION: 115.850441,33.004833";
QString s = "LOC";
str.indexOf(s); //3
str.indexOf(s, 6); //7截取指定位置字符
QString str = "AT+LOC+LOCATION: 115.850441,33.004833";
QString s = str.mid(6); //"+LOCATION: 115.850441,33.004833"
QString s = str.mid(6, 9); //"+LOCATION"字符串以特定串开始
QString url = "https://www.baidu.com";
if(url.startsWith("https") && url.endsWith("com")) //true
//等价于
if(url.left(5) == "https" && url.right(3) == "com") //true是否包含字符串
QString str = "AT+LOC+LOCATION: 115.850441,33.004833";
if(str.contains("LOC", Qt::CaseSensitive)) //true--------------------- 本文来自 thomas_blog 的CSDN 博客 ，全文地址请点击：https://blog.csdn.net/zhangxuechao_/article/details/81700266?utm_source=copy