cocos2d::Vector最佳用法

cocos2d::Vector<T>，下面是官方提供的示例用法：

//create Vector<Sprite*> with default size and add a sprite into itauto sp0 = Sprite::create();sp0->setTag(0);//here we use shared_ptr just as a demo. in your code, please use stack object insteadstd::shared_ptr<Vector<Sprite*>>  vec0 = std::make_shared<Vector<Sprite*>>();  //default constructorvec0->pushBack(sp0); //create a Vector<Object*> with a capacity of 5 and add a sprite into itauto sp1 = Sprite::create();sp1->setTag(1); //initialize a vector with a capacityVector<Sprite*>  vec1(5);//insert a certain object at a certain indexvec1.insert(0, sp1); //we can also add a whole vectorvec1.pushBack(*vec0); for(auto sp : vec1){    log("sprite tag = %d", sp->getTag());} Vector<Sprite*> vec2(*vec0);if (vec0->equals(vec2)) { //returns true if the two vectors are equal    log("pVec0 is equal to pVec2");}if (!vec1.empty()) {  //whether the Vector is empty    //get the capacity and size of the Vector, noted that the capacity is not necessarily equal to the vector size.    if (vec1.capacity() == vec1.size()) {        log("pVec1->capacity()==pVec1->size()");    }else{        vec1.shrinkToFit();   //shrinks the vector so the memory footprint corresponds with the number of items        log("pVec1->capacity()==%zd; pVec1->size()==%zd",vec1.capacity(),vec1.size());    }    //pVec1->swap(0, 1);  //swap two elements in Vector by their index    vec1.swap(vec1.front(), vec1.back());  //swap two elements in Vector by their value    if (vec2.contains(sp0)) {  //returns a Boolean value that indicates whether object is present in vector        log("The index of sp0 in pVec2 is %zd",vec2.getIndex(sp0));    }    //remove the element from the Vector    vec1.erase(vec1.find(sp0));    //pVec1->erase(1);    //pVec1->eraseObject(sp0,true);    //pVec1->popBack();     vec1.clear(); //remove all elements    log("The size of pVec1 is %zd",vec1.size());}

cocos2d::Vector最佳用法

1.优先考虑用栈生成的Vector<T>，而不是堆。栈生成的性能更好。

2.把Vector<T>做为参数传递时，如果不需要改变它，常把它作为const Vector<T>&,一般对象不需要修改都这么做，可以参考《Effective C++》条款03。

3.返回值是Vector<T>时，直接返回，C++11特性移动对象,编译器将其优化操作,而不是以前的拷贝。不熟悉的靴童可以参考下《C++ Primer 5th》的第十三章的对象移动。

4.Vector<T>,里面的元素必须是继续coco2d::Object。