QString 转 std::String

要将QString转换为std::string，可以使用QString的toStdString()方法。例如，通过以下代码可以实现QString到std::string的转换：

QString qstr = "Hello";
std::string str = qstr.toStdString();

这个代码将把qstr中的内容转换为std::string类型，并将结果存储在str中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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