c – 从QList中删除重复的对象

Binary predicate that,taking two values of the same type than those
contained in the list,returns true to remove the element passed as
first argument from the container,and false otherwise.
This shall be a function pointer or a function object.

所以在你的情况下你可以使用以下功能：

bool shouldRemove(MyData first,MyData second)
{
    // remove only if they have the same name and the first id
    // is smaller than the second one 
    return ( first.name == second.name && 
             first.id <= second.id ); 
}

简单地称之为,

std::list<MyData> myList = qlist.toStdList();
myList.unique(shouldRemove)

请注意,您需要先对std :: list进行排序

编辑

看来你可以在Qt容器中使用std :: unique(如果Qt是用STL支持构建的).所以在这种情况下,您可以执行以下操作：

// lessThan is a function that sorts first by name and then by id
qSort(qList.begin(),qList.end(),lessThan );
QList<MyData>::iterator it = std::unique (qList.begin(),shouldRemove);
qList.erase(it,qList.end());