Cocos2d-x 3.2 onEnter与onEnterTransitionDidFinish的区别
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CCLayer类里的虚函数
onEnter()--------Layer界面只要显示一点就会调用
onEnterTransitionDidFinish()--------Layer界面完全显示完全时候调用
onExit()
比如需要播放背景音乐,背景音乐可以在一开始进入场景 onEnter() 时候进行预加载,然后在完全进入场景 onEnterTransitionDidFinish() 的时候开始播放音乐。
- <p class="p1"><span class="s1">void</span><span class="s2"> </span><span class="s3">MenuScene</span><span class="s2">::onEnter()</span></p><p class="p1"><span class="s4" style="font-family: Arial;"> </span><span class="s5" style="font-family: Arial;">//</span><span class="s2" style="font-family: Arial;">在刚进入界面的时候预加载背景音乐,在</span><span class="s5" style="font-family: Arial;">MenuScene</span><span class="s2" style="font-family: Arial;">场景开始播放音乐</span></p><p class="p1"><span style="font-family: Arial;">{</span></p><p class="p3"><span class="s6"> </span><span class="s3">SimpleAudioEngine</span><span class="s6">::</span><span class="s2">getInstance</span><span class="s6">()-></span><span class="s2">preloadBackgroundMusic</span><span class="s6">(</span><span class="s7">"Background/Background1.mp3"</span><span class="s6">);</span></p><p class="p1"><span class="s2">}</span></p>
- //在完全进入这个场景后开始执行的事件
- void MenuScene::onEnterTransitionDidFinish()
- {
- //完全进入场景后开始播放音乐
- <span class="s3" style="color: rgb(51, 51, 51); font-family: monospace; font-size: 14px; line-height: 26px; white-space: pre; background-color: rgb(240, 240, 240);">SimpleAudioEngine</span><span class="s6" style="color: rgb(51, 51, 51); font-family: monospace; font-size: 14px; line-height: 26px; white-space: pre; background-color: rgb(240, 240, 240);">::</span><span class="s2" style="color: rgb(51, 51, 51); font-family: monospace; font-size: 14px; line-height: 26px; white-space: pre; background-color: rgb(240, 240, 240);">getInstance</span><span class="s6" style="color: rgb(51, 51, 51); font-family: monospace; font-size: 14px; line-height: 26px; white-space: pre; background-color: rgb(240, 240, 240);">()-></span>playBackgroundMusic("Background/Background1.mp3");
- }
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