cocos creator 1.9.3 editbox键入值后，界面销毁时崩溃，在苹果6手机上很容易出现（基本必现），其他手机暂时没有发现问题，在界面一直输入撤销都没有问题，只要整个弹框界面关闭就会崩溃
日志：
offestY = 0.000000
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Message from debugger: Terminated due to memory issue