[Cocos2d-x For WP8]Progress 进度条

Cocos2d-x可以有多种进度条的展示方式，进度条的种类是根据进度条运动的方向来区分，包括顺时针，逆时针，从左到右，从右到左，从下到上和从上到下6种方式，这和WP8的进度条是由很大的区别的。那么Cocos2d-x的进度条是需要用图片来进行展示，然后从不同的方向来渐渐把图片显示出来实现进度条的效果。

第一步需要创建一个CCProgressTo对象和CCProgressTimer对象，我们可以通过CCProgressTo::create(2, 100)方法创建CCProgressTo定义了进度条的时间和图片的百分比，第一个参数是时间是一个CCTime对象，第二个参数是结果显示图片的百分比。通过CCProgressTimer::progressWithFile("cat.png")方法创建CCProgressTimer定义了进度条的图片文件。

CCProgressTo *to1 = CCProgressTo::create(2, 100);
CCProgressTimer *left = CCProgressTimer::progressWithFile("cat.png");

第二步通过CCProgressTimer指针设置进度条的类型。

调用setType设置类型，

kCCProgressTimerTypeRadialCW 顺时针生成

kCCProgressTimerTypeRadialCCW 逆时针生成

kCCProgressTimerTypeHorizontalBarLR 从左到右生成

kCCProgressTimerTypeHorizontalBarRL 从右到左生成

kCCProgressTimerTypeVerticalBarBT 从下到上生成

kCCProgressTimerTypeVerticalBarTB 从上到下生成

left->setType( kCCProgressTimerTypeRadialCW );

第三步添加到场景，设置位置和重复的频率

addChild(left);
left->setPosition(CCPointMake(100, size.height*3/4));
left->runAction( CCRepeatForever::create(to1));

示例代码：

//逆时针转动
CCProgressTo *to1 = CCProgressTo::create(2, 100);
CCProgressTimer *left = CCProgressTimer::progressWithFile("cat.png");
left->setType( kCCProgressTimerTypeRadialCW );
addChild(left);
left->setPosition(CCPointMake(100, size.height*3/4));
left->runAction( CCRepeatForever::create(to1));
//顺时针转动
CCProgressTo *to2 = CCProgressTo::create(2, 100);
CCProgressTimer *right = CCProgressTimer::progressWithFile("cat.png");
right->setType( kCCProgressTimerTypeRadialCCW );
addChild(right);
right->setPosition(CCPointMake(100, size.height/4));
right->runAction( CCRepeatForever::create(to2));

//从左到右
CCProgressTo *toHorizontalBar1 = CCProgressTo::create(2, 100);
CCProgressTimer *leftHorizontalBar = CCProgressTimer::progressWithFile("cat.png");
leftHorizontalBar->setType( kCCProgressTimerTypeHorizontalBarLR );
addChild(leftHorizontalBar);
leftHorizontalBar->setPosition(CCPointMake(400, size.height*3/4));
leftHorizontalBar->runAction( CCRepeatForever::create(toHorizontalBar1));
//从右到左
CCProgressTo *toHorizontalBar2 = CCProgressTo::create(2, 100);
CCProgressTimer *rightHorizontalBar = CCProgressTimer::progressWithFile("cat.png");
rightHorizontalBar->setType( kCCProgressTimerTypeHorizontalBarRL );
addChild(rightHorizontalBar);
rightHorizontalBar->setPosition(CCPointMake(400, size.height/4));
rightHorizontalBar->runAction( CCRepeatForever::create(toHorizontalBar2));

//从底部到顶部
CCProgressTo *toVerticalBar1 = CCProgressTo::create(2, 100);
CCProgressTimer *leftVerticalBar = CCProgressTimer::progressWithFile("cat.png");
leftVerticalBar->setType( kCCProgressTimerTypeVerticalBarBT );
addChild(leftVerticalBar);
leftVerticalBar->setPosition(CCPointMake(700, size.height*3/4));
leftVerticalBar->runAction( CCRepeatForever::create(to1));
//从顶部到底部
CCProgressTo *toVerticalBar2 = CCProgressTo::create(2, 100);
CCProgressTimer *rightVerticalBar = CCProgressTimer::progressWithFile("cat.png");
rightVerticalBar->setType( kCCProgressTimerTypeVerticalBarTB );
addChild(rightVerticalBar);
rightVerticalBar->setPosition(CCPointMake(700, size.height/4));
rightVerticalBar->runAction( CCRepeatForever::create(toVerticalBar2));

运行的效果：