Cocos2d-x提供了进度条动作,该类继承CCActionInterval。继承关系如下:
在使用CCProgressto时还需要CCProgresstimer。
在CCProgresstimer类中,仅仅只有一个create函数用来创建,其参数是一个精灵,如下:
static CCProgresstimer* create(CCSprite* sp);
CCProgresstimer在创建后,还需要设置一些其他参数。
CCProgressto类中也仅仅有一个create用来创建,代码如下:
/** Creates and initializes with a duration and a percent */ static CCProgressto* create(float duration,float fPercent);float duration:进度条执行完需要的时间。
float fPercent:进度条的百分比,100是进度条满。
一、辐射性进度条
实例:
CCProgressto* radial = CCProgressto::create(2,100); CCProgresstimer* radialProgress = CCProgresstimer::create(CCSprite::create("btn_go_0.png")); radialProgress->setType(kCCProgresstimerTypeRadial); radialProgress->setPosition(ccp(100,100)); radialProgress->setMidpoint(ccp(0.1,0.2)); radialProgress->setReverseProgress(true); radialProgress->runAction(radial); addChild(radialProgress);
setType:用来设置进度条的类型。
setMidpoint:用来设置旋转中心。
setReverseProgress:用来设置进度条执行方向,默认是顺时针。
Midpoint与BarChangeRate声明如下:
/** * Midpoint is used to modify the progress start position. * If you're using radials type then the midpoint changes the center point * If you're using bar type the the midpoint changes the bar growth * it expands from the center but clamps to the sprites edge so: * you want a left to right then set the midpoint all the way to ccp(0,y) * you want a right to left then set the midpoint all the way to ccp(1,y) * you want a bottom to top then set the midpoint all the way to ccp(x,0) * you want a top to bottom then set the midpoint all the way to ccp(x,1) */ CC_PROPERTY(CCPoint,m_tMidpoint,Midpoint); /** * This allows the bar type to move the component at a specific rate * Set the component to 0 to make sure it stays at 100%. * For example you want a left to right bar but not have the height stay 100% * Set the rate to be ccp(0,1); and set the midpoint to = ccp(0,.5f); */ CC_SYNTHESIZE(CCPoint,m_tBarChangeRate,BarChangeRate);二、条状进度条
实例:
CCProgresstimer * barProgress = CCProgresstimer::create(CCSprite::create("btn_go_0.png")); CCProgressto * bar = CCProgressto::create(2,100); barProgress->setType(kCCProgresstimerTypeBar); barProgress->setMidpoint(ccp(1,0)); barProgress->setBarChangeRate(ccp(1,1)); barProgress->setPosition(ccp(200,100)); barProgress->runAction(bar); addChild(barProgress);具体辐射性进度条已经解释。
原文地址:https://www.jb51.cc/cocos2dx/342804.html
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