用系統(tǒng)自帶的一個資源做一個全屏適配，把b len d屬性值調(diào)一下

在代碼中獲取節(jié)點

@property(cc.Node)

blendMask:cc.Node = null;

實現(xiàn)：

this.blendMask.active = true;

this.blendMask.opacity = 0;

this.blendMask.opacity = 255;

cc.tween(this.blendMask).to(0.5,{opacity:1})

.call(()=>{}

)

.to(0.5,{opacity:255})

.call(()=>{

})

.start();