cocos2dx encapsulates some commonly used data structures, which we introduce in two parts. Part of it is the boxing of basic data types, int, float, double, bool. Part of it is a relatively complex composite data structure __String, __Array, __Dictionary, Size, Rect, Point, most of these data structures are rewritten in C++ to rewrite the interface of the Foundation framework in the OC language. So those with OC background can adjust it, just browse it.
第一部分：
int对应的装箱是Integer，在cocos2dx中创建这种整数对象是用create方法，auto pInt = Integer::create(30);
int ---------auto pInt = __Integer::create(2);
double ---------auto pDouble = __Double::create(1.0);
float ---------auto pFloat = __Float::create(2.0);
第二部分：
复合数据结构
__String
auto pStr = String::create("cocos2dx");
auto pStr2 = String::createWithFormat("I love %s", pStr->getCString());
bool isEqualEach = pStr->isEqual(pStr2);
log("%s",isEqualEach == true?"Equal":"not Equal");
#结果是notEqual
__Array
Array对象是对C++中数组的封装。Array中的元素是Ref、可以存不同的数据类型。
创建一个空数组，Array::create()
增：add系列、addObject 删：removeXXX系列，代表removeObjectAtIndext() 改:replaceObjectAtIndex() 查：get系列、getIndexOfObject()
__Dictionary
创建字典对象，auto pDict = Dictionary::create()
添加键值对，pDict->setObject(obj, "key");
删除键对应的值， pDict->removeObjectForKey("someKey");
查 ，pDict->ObjectForKey("someKey");
auto pDict = Dictionary::create();
auto pV1 = String::create("V1");
auto pV2 = String::create("V2");
pDict->setObject(pV1, "key1");
pDict->setObject(pV2, "key2");
String *pStr1 = (String*)pDict->ObjectForKey("key1");
String *pStr2 = (String*)pDict->ObjectForKey("key2");
log("str1 = %s,str2 = %s", pStr1->getCString(), pStr2->getCString());
#使用ObjectForKey获得的是Object对象，要强制类型转换为你确定的那个类型。
Size、Rect、Point
Size于Rect的区别是Size只有长宽的属性，而Rect还有个起始点属性，他们都是表示一块矩形区域。
其中Rect最常使用的是用来判断某个点在不再这个矩形区域内。其实他们都是对象，不像OC中是结构体。
1 // 生成两个点
2 Point point1 = Point(10,10);
3 Point point2 = Point(60,60);
4 Point point3;
5 // 点1与x轴的夹角
6 log("\n点1(%f,%f)与x轴的夹角为:%f",point1.x,point1.y,point1.getAngle());
7 // 两个点的夹角
8 log("\n点1(%f,%f)与点2(%f,%f)的夹角为:%f",point1.x,point1.y,point2.x,point2.y,point1.getAngle(point2));
9 // 两个点的距离
10 log("\n点1(%f,%f)与点2(%f,%f)的距离为:%f",
11 point1.x,point1.y,point2.x,point2.y,point1.getDistance(point2));
12 // 两个点相加
13 point3 = point1 + point2;
14 log("\n(%f,%f)+(%f,%f)=(%f,%f)",point1.x,point1.y,point2.x,point2.y,point3.x,point3.y);
15 // 两个点相减
16 point3 = point1-point2;
17 log("\n(%f,%f)-(%f,%f)=(%f,%f)",point1.x,point1.y,point2.x,point2.y,point3.x,point3.y);
18 // 除法
19 point3 = point1/2;
20 log("\n(%f,%f)/2=(%f,%f)",point1.x,point1.y,point3.x,point3.y);
21 // 乘法
22 point3 = point1*2;
23 log("\n(%f,%f)+(%f,%f)=(%f,%f)",point1.x,point1.y,point2.x,point2.y,point3.x,point3.y);
24
25 // 使用SizeMake创建两个Size
26 Size size1 = Size(10, 20);
27 Size size2 = Size(50, 60);
28 Size size3;
29 // 两个Size相加
30 size3 = size1 + size2;
31 log("size(%f,%f)+size(%f,%f)=size(%f,%f)",size1.width,size1.height,size2.width,size2.height,size3.width,size3.height);
32 // 两个Size相减
33 size3 = size1 - size2;
34 log("size(%f,%f)－size(%f,%f)=size(%f,%f)",size1.width,size1.height,size2.width,size2.height,size3.width,size3.height);
35 // Size乘法
36 size3 = size1*10;
37 log("size(%f,%f)*10=size(%f,%f)",size1.width,size1.height,size3.width,size3.height);
38 // Size除法
39 size3 = size1/10;
40 log("size(%f,%f)/10=size(%f,%f)",size1.width,size1.height,size3.width,size3.height);
41
42
43 // Rect测试
44 // 生成一个坐标为10，20，宽为50，高为30的矩形区域
45 Rect rect = Rect(10, 20, 50, 30);
46 // 生成两个点
47 point1 = Point(15,25);
48 point2 = Point(100,100);
49 if (rect.containsPoint(point1)) {
50 log("rect包含点point1\n");
51 } else{
52 log("rect不包含点point1\n");
53 }
54 if (rect.containsPoint(point2)) {
55 log("rect包含点point2\n");
56 } else{
57 log("rect不包含点point2\n");
58 }
59 // 获取rect矩形区域最左、右、上、下、中间的坐标点
60 float maxX = rect.getMaxX();
61 float minX = rect.getMinX();
62 float maxY = rect.getMaxY();
63 float minY = rect.getMinY();
64 float midX = rect.getMidX();
65 float midY = rect.getMidY();
66 log("rect的左下角坐标为(%f,%f)\n左上角坐标为(%f,%f)\n右下角坐标为(%f,%f)\n右上角角坐标为(%f,%f)\n中点坐标为(%f,%f)\n"
67 ,minX,minY,minX,maxY,maxX,minY,maxX,maxY,midX,midY);