我有一个简单的类：

class SomeClass
   QString key;
   QString someData;
   int otherField;
   public:
      QString getKey() { return key };
};

我有一份清单：

QList<SomeClass*> myList;

我想检查myList中是否包含key =“mykey1”的object；

for(int i = 0; i < myList.size(); i++)
  if(myList.at(i)->getKey() == "mykey1") 
      //do something with object, that has index = i