cocos2d学习笔记----制作技能

技能按钮

• 技能按钮类:继承于按钮类
• 使用观察者模式(一对多的关系)：底层实质就是函数指针
  • 监听器(观察者)
  • 回调函数

SkillButton.h

#ifndef _SkillButton_H_
#define _SkillButton_H_
#include "Ui/CocosGUI.h"
class SkillButton :public cocos2d::ui::Button{
public:
    SkillButton(float coldTime):
        coldTime(coldTime), 
        isCold(false), 
        onColdBegan(nullptr),
        onColdEnded(nullptr)
    {
    
    }
    //~SkillButton();
    static SkillButton* create(
        float coldTime,
        const std::string& normalImage,
        const std::string& selectedImage = "",
        const std::string& disableImage = "",
        TextureResType texType = TextureResType::LOCAL);
    bool init(
        const std::string& normalImage,
        const std::string& selectedImage = "",
        const std::string& disableImage = "",
        TextureResType texType = TextureResType::LOCAL);
public:
    //function<返回值类型(形参表)> 变量名
    typedef std::function<void()> ccColdBeganCallback;
    typedef std::function<void()> ccColdEndedCallback;
    ccColdBeganCallback onColdBegan;//指向当冷却开始时要调用的函数
    ccColdEndedCallback onColdEnded;//指向当冷却结束时要调用的函数
private:
    float coldTime;//技能冷却时间
    bool isCold;//技能是否正在冷却
};
#endif // !_SkillButton_H_

SkillButton.cpp

#include "SkillButton.h"
#include "cocos2d.h"
using namespace cocos2d::ui;
using namespace cocos2d;
SkillButton* SkillButton::create(
    float coldTime,
    const std::string& normalImage,
    const std::string& selectedImage,
    const std::string& disableImage,
    TextureResType texType) {
    SkillButton* ret = new(std::nothrow) SkillButton(coldTime);
    if (ret && ret->init(normalImage, selectedImage, disableImage, texType)) {
        ret->autorelease();
    } else {
        delete ret;
        ret = nullptr;
    }
    return ret;
}

bool SkillButton::init(
    const std::string& normalImage,
    const std::string& selectedImage,
    const std::string& disableImage,
    TextureResType texType) {
    if (!Button::init(normalImage, selectedImage, disableImage, texType)) {
        return false;
    }
    /*EventListenerTouchOneByOne*/
    //创建遮罩精灵:灰色
    Sprite* sp = Sprite::create(normalImage);
    //sp->setAnchorPoint(Vec2(0, 0));
    sp->setColor(Color3B::GRAY);

    //ProgressTimer:进度计数器(0 - 100)
    ProgressTimer* progressTimer = ProgressTimer::create(sp);
    progressTimer->setAnchorPoint(Vec2::ZERO);//设置锚点
    //progressTimer->setPercentage(80);//设置百分比
    progressTimer->setReverseDirection(true);//翻转旋转方向
    this->addChild(progressTimer);

    //给当前按钮添加点击监听事件
    this->addClickEventListener([this, progressTimer](Ref*) {
        //判断是否在技能冷却
        if (!isCold) {
            //调用冷却开始的函数
            if (onColdBegan != nullptr) {
                onColdBegan();//函数指针(实参表)
            }
            isCold = true;
            setTouchEnabled(false);//设置关闭触摸
            //1.时间 2.开始的百分比 3.结束的百分比
            auto progressFromTo = ProgressFromTo::create(coldTime, 100, 0);

            auto callFunc = CallFunc::create([this]() {
                //调用冷却结束的函数
                if (onColdEnded != nullptr) {
                    onColdEnded();//函数指针(实参表)
                }
                isCold = false;//关闭技能冷却
                setTouchEnabled(true);//开启触摸
            });
            auto seqAct = Sequence::create(progressFromTo, callFunc, nullptr);
            progressTimer->runAction(seqAct);
        }
    });
    return true;
}