【3.x】
(1)去掉 “CC”
(2)对象类 CCObject 改为 Ref
(3)按钮事件回调依旧为 cccontrol_selector ,没有使用 CC_CALLBACK_2
(4)按钮状态 CCControlState 改为强枚举 Control::State
//
NORMAL //正常
HIGH_LIGHTED //高亮(即在内部触摸状态下)
DISABLED //禁用
SELECTED //选中
//
(5)按钮事件 CCControlEvent 改为强枚举 Control::EventType
//
TOUCH_DOWN //刚刚开始触摸按钮时
DRAG_INSIDE //在内部拖动时(保持触摸状态下)
DRAG_OUTSIDE //在外部拖动时(保持触摸状态下)
DRAG_ENTER //拖动刚进入内部时(保持触摸状态下)
DRAG_EXIT //拖动刚离开内部时(保持触摸状态下)
TOUCH_UP_INSIDE //在内部抬起手指(保持触摸状态下)
TOUCH_UP_OUTSIDE //在外部抬起手指(保持触摸状态下)
TOUCH_CANCEL //取消触点
//
按钮控件CCControlButton,想必大家对这个再熟悉不过了吧?每个游戏基本都会用到按钮。
一个按钮不仅有几种不同的按钮状态,而且还有一些按钮事件。另外按钮控件CCControlButton使用的背景图片是点九图CCScale9Sprite,可以使得按钮在变大的情况下,尽量保持棱角不失真。
1、按钮状态CCControlState
//
CCControlStateNormal //正常
CCControlStateHighlighted //高亮(即在内部触摸状态下)
CCControlStateDisabled //禁用
CCControlStateSelected //选中
//
2、按钮事件CCControlEvent
//
CCControlEventTouchDown //刚刚开始触摸按钮时
CCControlEventTouchDragInside //在内部拖动时(保持触摸状态下)
CCControlEventTouchDragOutside //在外部拖动时(保持触摸状态下)
CCControlEventTouchDragEnter //拖动刚进入内部时(保持触摸状态下)
CCControlEventTouchDragExit //拖动刚离开内部时(保持触摸状态下)
CCControlEventTouchUpInside //在内部抬起手指(保持触摸状态下)
CCControlEventTouchUpOutside //在外部抬起手指(保持触摸状态下)
CCControlEventTouchCancel //取消触点
//
3、绑定按钮事件的方法
![](/qrcode.jpg)
//
//绑定控件事件
addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDownAction), CCControlEventTouchDown);
void addTargetWithActionForControlEvents(CCObject* target, SEL_CCControlHandler action, CCControlEvent controlEvents);
//删除控件事件
//removeTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDownAction), CCControlEventTouchDown);
void removeTargetWithActionForControlEvents(CCObject* target, SEL_CCControlHandler action, CCControlEvent controlEvents);
//
4、需要引用的头文件及命名空间
//
#include "cocos-ext.h" //包含cocos-ext.h头文件
using namespace cocos2d::extension; //引用cocos2d::extension命名空间
//
5、常用操作如下
//
class CCControlButton : public CCControl
{
/**
* 创建CCControlButton的三种方法
*/
//使用点九图CCScale9Sprite,按钮中不带标签CCLabel
static CCControlButton* create(CCScale9Sprite* sprite);
//使用标签label,可以是CCLabelTTF、CCLabelBMFont
static CCControlButton* create(CCNode* label, CCScale9Sprite* backgroundSprite);
//title:标签内容
//fontName:字体资源,如 "Arial"
//fontSize:字体大小,默认 12
//内部创建的标签为CCLabelTTF
static CCControlButton* create(std::string title, const char* fontName, float fontSize);
/**
* 属性设置1(在当前CCControlState下)
* getCurrentTitle , getCurrentTitleColor ,
* TitleLabel , BackgroundSprite , PreferredSize
*/
//当前显示的标签内容,只读getCurrentTitle
CC_SYNTHESIZE_READONLY(CCString*, m_currentTitle, CurrentTitle);
//当前显示的标签内容颜色,只读getCurrentTitleColor
CC_SYNTHESIZE_READONLY_PASS_BY_REF(ccColor3B, m_currentTitleColor, CurrentTitleColor);
//设置当前CCControlState下的标签,set/get
CC_SYNTHESIZE_RETAIN(CCNode*, m_titleLabel, TitleLabel);
//设置当前CCControlState下的背景精灵,set/get
CC_SYNTHESIZE_RETAIN(CCScale9Sprite*, m_backgroundSprite, BackgroundSprite);
//设置按钮大小,若标签label大小大于按钮,将自动扩展,set/get。
//不过经过我的测试:设置了,反而按钮大小被固定了。没有按照label的大小进行自动伸展了。
CC_PROPERTY(CCSize, m_preferredSize, PreferredSize);
/**
* 属性设置2(在指定CCControlState下)
* setTitleLabelForState , setTitleForState , setTitleColorForState ,
* setTitleTTFForState , setTitleTTFSizeForState ,
* setTitleBMFontForState ,
* setBackgroundSpriteForState , setBackgroundSpriteFrameForState , getBackgroundSpriteForState
*/
//设置在指定CCControlState下的 字体标签
//若未设置标签,默认为CCButtonStateNormal状态的字体标签
//字体标签可以是CCLabelTTF、CCLabelBMFont
virtual void setTitleLabelForState(CCNode* label, CCControlState state);
virtual CCNode* getTitleLabelForState(CCControlState state);
//设置在指定CCControlState下的 标签内容
//若未设置标签,默认返回CCButtonStateNormal状态的标签内容
virtual void setTitleForState(CCString* title, CCControlState state);
virtual CCString* getTitleForState(CCControlState state);
//设置在指定CCControlState下的 标签颜色
virtual void setTitleColorForState(ccColor3B color, CCControlState state);
virtual const ccColor3B getTitleColorForState(CCControlState state);
//###############################################################################
//设置在指定CCControlState下的 标签为CCLabelTTF
//fntFile为字体资源名,如 "Arial"
virtual void setTitleTTFForState(const char* fntFile, CCControlState state);
virtual const char* getTitleTTFForState(CCControlState state);
//设置在指定CCControlState下的 CCLabelTTF标签的字体大小
virtual void setTitleTTFSizeForState(float size, CCControlState state);
virtual float getTitleTTFSizeForState(CCControlState state);
//###############################################################################
//设置在指定CCControlState下的 标签为CCLabelBMFont
//fntFile为字体资源名,如 *.fnt
virtual void setTitleBMFontForState(const char* fntFile, CCControlState state);
virtual const char * getTitleBMFontForState(CCControlState state);
//###############################################################################
//使用点九图CCScale9Sprite,设置在指定CCControlState下的 背景精灵
virtual void setBackgroundSpriteForState(CCScale9Sprite* sprite, CCControlState state);
//使用精灵帧CCSpriteFrame,设置在指定CCControlState下的 背景精灵
//其实在内部实现的代码,实际上是利用精灵帧spriteFrame创建了点九图CCScale9Sprite作为背景精灵
virtual void setBackgroundSpriteFrameForState(CCSpriteFrame* spriteFrame, CCControlState state);
//获取在指定CCControlState下的 背景图
virtual CCScale9Sprite* getBackgroundSpriteForState(CCControlState state);
/**
* 继承于父类
*/
virtual void setEnabled(bool enabled); //是否启用
virtual void setSelected(bool enabled); //是否选中
virtual void setHighlighted(bool enabled); //是否高亮
};
//
【代码实战】
代码来源于cocos2dx的官方项目TestCpp中。
1、按钮背景(正常、高亮)
2、引入头文件和命名空间
//
#include "cocos-ext.h"
using namespace cocos2d::extension;
//
3、在HelloWorld.h中声明按钮事件的回调函数、显示按钮状态的Label
//
CCLabelTTF* displayLabel; //显示按钮状态的label
void touchDownAction(CCObject* sender, CCControlEvent controlEvent); //刚刚开始触摸按钮时
void touchDragInsideAction(CCObject* sender, CCControlEvent controlEvent); //在内部拖动时(保持触摸状态下)
void touchDragOutsideAction(CCObject* sender, CCControlEvent controlEvent); //在外部拖动时(保持触摸状态下)
void touchDragEnterAction(CCObject* sender, CCControlEvent controlEvent); //拖动刚进入内部时(保持触摸状态下)
void touchDragExitAction(CCObject* sender, CCControlEvent controlEvent); //拖动刚离开内部时(保持触摸状态下)
void touchUpInsideAction(CCObject* sender, CCControlEvent controlEvent); //在内部抬起手指(保持触摸状态下)
void touchUpOutsideAction(CCObject* sender, CCControlEvent controlEvent); //在外部抬起手指(保持触摸状态下)
void touchCancelAction(CCObject* sender, CCControlEvent controlEvent); //取消触点
//
4、在HelloWorld.cpp的init中创建按钮,并绑定按钮事件
//
bool HelloWorld::init()
{
if ( !CCLayer::init() )
{
return false;
}
//获取可视区域尺寸大小
CCSize mysize = CCDirector::sharedDirector()->getVisibleSize();
//获取可视区域的原点位置
CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();
//屏幕正中心位置
CCPoint midPos = ccp(mysize.width/2, mysize.height/2);
//显示按钮状态的标签displayLabel
displayLabel = CCLabelTTF::create("No Event", "Marker Felt", 32);
displayLabel->setPosition( midPos + ccp(0, 100) );
this->addChild(displayLabel);
//按钮中的背景精灵CCScale9Sprite
CCScale9Sprite* bgNormal = CCScale9Sprite::create("btnNormal.png"); //正常背景
CCScale9Sprite* bgHighlighted = CCScale9Sprite::create("btnHighlighted.png"); //高亮背景
//按钮中的标签CCLabelTTF
CCLabelTTF* titleNormal = CCLabelTTF::create("Button is Normal !", "Marker Felt", 30);
CCLabelTTF* titleHighlighted = CCLabelTTF::create("Button is Highlighted !", "Marker Felt", 30);
//创建按钮CCControlButton
CCControlButton* btn = CCControlButton::create(titleNormal, bgNormal);
btn->setPosition( midPos );
this->addChild(btn);
//设置按钮高亮时的状态
btn->setTitleLabelForState(titleHighlighted, CCControlStateHighlighted); //高亮标签
btn->setTitleColorForState(ccRED, CCControlStateHighlighted); //红色
btn->setBackgroundSpriteForState(bgHighlighted, CCControlStateHighlighted); //高亮背景
//写了这句话,反而大小被固定了。没有按照label的大小进行自动伸展了
//btn->setPreferredSize( CCSizeMake(120,40) );
//绑定事件,用于显示按钮状态
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDownAction), CCControlEventTouchDown); //刚刚开始触摸按钮时
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDragInsideAction), CCControlEventTouchDragInside); //在内部拖动时(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDragOutsideAction), CCControlEventTouchDragOutside); //在外部拖动时(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDragEnterAction), CCControlEventTouchDragEnter); //拖动刚进入内部时(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchDragExitAction), CCControlEventTouchDragExit); //拖动刚离开内部时(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchUpInsideAction), CCControlEventTouchUpInside); //在内部抬起手指(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchUpOutsideAction), CCControlEventTouchUpOutside); //在外部抬起手指(保持触摸状态下)
btn->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::touchCancelAction), CCControlEventTouchCancel); //取消触点
return true;
}
//
5、实现按钮事件的回调函数
//
//刚刚开始触摸按钮时
void HelloWorld::touchDownAction(CCObject *senderz, CCControlEvent controlEvent)
{
displayLabel->setString("Touch Down");
}
//在内部拖动时(保持触摸状态下)
void HelloWorld::touchDragInsideAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Drag Inside");
}
//在外部拖动时(保持触摸状态下)
void HelloWorld::touchDragOutsideAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Drag Outside");
}
//拖动刚进入内部时(保持触摸状态下)
void HelloWorld::touchDragEnterAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Drag Enter");
}
//拖动刚离开内部时(保持触摸状态下)
void HelloWorld::touchDragExitAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Drag Exit");
}
//在内部抬起手指(保持触摸状态下)
void HelloWorld::touchUpInsideAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Touch Up Inside.");
}
//在外部抬起手指(保持触摸状态下)
void HelloWorld::touchUpOutsideAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Touch Up Outside.");
}
//取消所有触摸
void HelloWorld::touchCancelAction(CCObject *sender, CCControlEvent controlEvent)
{
displayLabel->setString("Touch Cancel");
}
//
6、运行结果
7、分析与总结
(1)本来一个这么小的按钮图片,这么变这么大了呢?这是因为当标签CCLabelTTF的大小大于按钮大小时,按钮就会自动进行伸展。
(2)按钮事件:
CCControlEventTouchDragEnter //拖动刚进入内部时(保持触摸状态下)
CCControlEventTouchDragExit //拖动刚离开内部时(保持触摸状态下)
只有在正好进入或离开按钮内部时才看得到效果,手一抖就变成DragInside或DragOutside了。