目的
———了解生命周期
初始化 -》启动完成(启动导演单例 -》 显示视图-》显示场景)
———了解开发 编译 运行 调试
1 执行顺序?
2 如何在界面显示控件?
创建精灵-》设置位置-》添加到父节点(addChild)
3 设置的控件在界面上显示不全?
1> getContentSize.width() or getContentSize.height() ,显示的坐标根据内容高宽做调整。
2> setAnchorPoint() 设置锚点(即,修改控件的中心点),显示的坐标根据内容高宽做调整。
void Node::addChild(Node *child, int zOrder)// zOrder小的显示在底层,zOrder大的显示在顶层。 顶层会覆盖显示底层的控件。
5 调试
1> 在visual studio中
vsIDE自带, 断点 + 单步调试 + 变量值查看
2> 通用,使用CCLog 打印日志
_________________________扩展阅读_________________________
CC_CALLBACK原理及应用
c++ 11基础 :
@H_404_114@std::function
@H_404_114@类模版std::function是一种通用、多态的函数封装。std::function的实例可以对任何可以调用的目标进行存储、复制、和调用操作,这些目标包括函数、lambda表达式、绑定表达式、以及其它函数对象等。
@H_404_114@②保存lambda表达式
()>func_1=[](){cout<<
"helloworld"
<<endl;};
func_1();
bind bind是一组用于函数绑定的模板。在对某个函数进行绑定时,可以指定部分参数或全部参数,也可以不指定任何参数,还可以调整各个参数间的顺序。对于未指定的参 数,可以使用占位符_1、_2、_3来表示。_1表示绑定后的函数的第1个参数,_2表示绑定后的函数的第2个参数,其他依次类推。
下面通过程序例子了解一下用法:
#include<iostream>
using
namespace
std;
class
A
{
public
:
fun_3(
k,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">m)
{
cout<<k<<
""
<<m<<endl;
}
};
fun(
x,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">y,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">z)
{
cout<<x<<
<<y<<
<<z<<endl;
}
fun_2(
&a,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">&b)
{
a++;
b++;
cout<<a<<
<<b<<endl;
}
main(
argc,
const
char
*argv[])
{
f1();
//print:123
f2=bind(fun,placeholders::_1,placeholders::_2,3);
f2(1,2);
//print:123
f3=bind(fun,3);
//注意:f2和f3的区别。
f3(1,0)!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">//print:213
n=2;
m=3;
f4=bind(fun_2,n,placeholders::_1);
f4(m);
//print:34
cout<<m<<endl;
//print:4说明:bind对于不事先绑定的参数,通过std::placeholders传递的参数是通过引用传递的
cout<<n<<endl;
//print:2说明:bind对于预先绑定的函数参数是通过值传递的
Aa;
f5=bind(&A::fun_3,a,placeholders::_2);
f5(10,20);
//print:1020
,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">)>fc=std::bind(&A::fun_3,std::placeholders::_1,std::placeholders::_2);
fc(10,0)!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">//print:1020
return
0;
}
|
CC_CALLBACK
一、通过 HelloWorldScene 中的 closeItem 开始
在cocos2d-x 2.x 版本中:
"CloseNormal.png"
"CloseSelected.png"
this
menu_selector(HelloWorld::menuCloseCallback));
@H_404_114@在cocos2d-x 3.0 版本中:
closeItem=MenuItemImage::create(
CC_CALLBACK_1(HelloWorld::menuCloseCallback,monospace!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-size:1em!important; min-height:inherit!important; background:none!important">));
|
Director::getInstance()->end();
#if(CC_TARGET_PLATFORM==CC_PLATFORM_IOS)
exit
(0);
#endif
}