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_outerClipper->setStencil( target ); //target是背景
_outerClipper->addChild( holesClipper ); //holesClipper是第二层
holesClipper->addChild( target );
holesClipper->addChild( _holes ); // _holes是效果节点
holesClipper->setStencil( _holesStencil); //真正的镂空处
_holesStencil->addChild( holeStencil ); //holeStencil是
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原文地址:http://www.cnblogs.com/lz20150121/p/4277763.html