const QString &

`const QString` 是一个在 Qt 框架中用于表示 Unicode 字符串的类。`const` 修饰符表示该对象被声明为只读，即其值不能被修改。因此，`const QString` 表示一个只读的 Unicode 字符串对象。在函数参数中使用 `const QString` 可以确保函数不会修改传入的字符串对象。

相关问题

const QString &name

`const QString` 是一个不可修改的 QString 对象，即其值在创建后不能被修改。这通常用于在函数参数中传递字符串，以确保该字符串不会被修改。例如：

void myFunction(const QString& str)
{
    // 这里不能修改 str 的值
}

const QString &name跟const QString name有什么不同

`const QString` is a type in the Qt framework's C++ API. It denotes a constant string object, which means that the string cannot be modified once it has been initialized. This is achieved by making the string data read-only. It is often used in situations where you want to ensure that a string value does not change during execution, such as in function parameters or class member variables. The `QString` class is used for handling Unicode strings in Qt, and provides a wide range of methods for manipulating and comparing strings.