问题描述
CASegmentedControl的简单介绍CASegmentedControl相当于Android中的TabView。在开发过程中十分常用。CASegmentedControl使用起来并不负责，寥寥几行代码便可搞定。segment = CASegmentedControl::createWithCenter(CADipRect(size.width*0.5,size.height*0.3, size.width*0.8, size.height*0.1), 3); segment->setTitleAtIndex("Page0", 0, CAControlStateAll);//根据index设置标题文字 segment->setTitleAtIndex("Page1", 1, CAControlStateAll); segment->setTitleAtIndex("Page2", 2, CAControlStateAll); segment->setTitleColorAtIndex(CAColor_white, 0, CAControlStateAll); //根据index设置颜色 segment->setTitleColorAtIndex(CAColor_gray, 1, CAControlStateAll); segment->setTitleColorAtIndex(CAColor_yellow, 2, CAControlStateAll); segment->setSelectedAtIndex(1); //设置当前选中项 segment->addTarget(this, CAControl_selector(MainMenuViewController::segmentCallback));//设置点击回调函数 this->getView()->addSubview(segment); 并设置一个回调函数void MainMenuViewController::segmentCallback(CAControl* btn, CCPoint point) { switch (segment->getselectedIndex()) { case 0: { label->setText("The first page");//替换为相关**作即可 break; } case 1: { label->setText("The second page"); break; } case 2: { label->setText("The third page"); break; } default: break; } } 其中有一点需要说明，如果在会掉函数中 通过setTag 和getSubViewByTag的方式获得 View，会出现空指针的问题，（不知道是不是我的方法不对，希望高手解答），所以在此我的方法是将segment和label都设置为类的成员函数。CASegmentedControl可以设置背景图案，方法如下：char segNormal = ""; char segHighlighted = ""; char segSelected = ""; char pages = ""; segment = CASegmentedControl::createWithCenter(CADipRect(size.width*0.5,size.height*0.3, size.width*0.8, size.height*0.1), 3); for (int i = 0; i setTitleAtIndex(pages, i, CAControlStateAll); segment->setBackgroundImageAtIndex(CAImage::create(segNormal), i, CAControlStateNormal); segment->setBackgroundImageAtIndex(CAImage::create(segHighlighted), i, CAControlStateHighlighted); segment->setBackgroundImageAtIndex(CAImage::create(segSelected), i, CAControlStateSelected); } segment->setTitleColorAtIndex(CAColor_white, 0, CAControlStateAll); //根据index设置颜色 segment->setTitleColorAtIndex(CAColor_gray, 1, CAControlStateAll); segment->setTitleColorAtIndex(CAColor_yellow, 2, CAControlStateAll); segment->setSelectedAtIndex(1); //设置当前选中项 segment->addTarget(this, CAControl_selector(MainMenuViewController::segmentCallback));//设置点击回调函数 this->getView()->addSubview(segment); 在CASegmentedControl的类中有两个有关开始点击，和取消点击的虚函数，如果需要设置相关监听，则需要对CASegmentedControl类进行集成，然后重写这两个函数，这两个函数分别是：virtual void onExitTransitionDidStart(); virtual void onEnterTransitionDidFinish();