问题描述
如题，在APP未初始化完成（splash界面，未执行onLaunch事件）的时候快速按返回键退出APP，有很大几率会出现下次打不开APP（会出现白屏、闪退、卡死等情况）
HBuilderX版本
2.3.3.20190923
测试机型
测试机型：OPPO A3（安卓8.1），红米5Plus（安卓8.1），华为荣耀9X（安卓9）
客户反馈的机型：华为、荣耀、VIVO、OPPO、魅族等品牌的机型上面均出现该问题
修改建议
在APP未初始化完成的时候，禁止按返回键退出APP（未执行onLaunch事件之前禁止用返回键退出APP）
异常日志
在splash界面按返回键退出时的异常信息：
15:42:29.692 42:28.355 1891 1912 E console : [ERROR] reportJSException >>>> exception function:createInstanceContext, exception:JavaScript execute error!TypeError: undefined is not an object (evaluating 'this.__callbacks__[e]')15:43:33.973 appServiceSDKScriptError
15:43:33.995 undefined is not an object (evaluating 'c.onBackPress'); at uni.navigateBack
15:43:34.013 e```javascript
15:43:34.034 Xn
15:43:34.075 invoke
15:43:34.096 invoke
15:43:34.117 X
15:43:34.159 Wc
15:43:34.262 Me
15:43:34.303 onCallback
15:43:34.345 callbackFromNative
15:43:34.365 eval code
15:43:34.386 eval@[native code]
15:43:34.428 consume
15:43:34.448 map@[native code]
15:43:34.469 appServiceSDKScriptError
15:43:34.490 undefined is not an object (evaluating 'c.onBackPress'); at uni.navigateBack
15:43:34.512 e
15:43:34.533 Xn
15:43:34.573 invoke
15:43:34.594 invoke
15:43:34.615 X
15:43:34.657 Wc
15:43:34.759 Me
15:43:34.801 onCallback
15:43:34.843 callbackFromNative
15:43:34.864 eval code
15:43:34.885 eval@[native code]
15:43:34.926 consume
15:43:34.947 map@[native code]再次打开APP白屏，白屏的时候的异常日志：
15:44:09.735 44:08.402 2911 3897 E console : [ERROR] reportJSException >>>> exception function:callReportCrash, exception:weex core process crash and restart exception
15:44:13.844 44:12.509 2911 2928 E console : [ERROR] reportJSException >>>> exception function:createInstanceContext, exception:JavaScript execute error!ReferenceError: Can't find variable: WeexPlus或者直接卡死在splash界面时的异常日志：
15:47:07.190 47:05.849 5181 6268 E console : [ERROR] reportJSException >>>> exception function:callReportCrash, exception:weex core process crash and restart exception
15:47:13.695 47:12.360 5181 5198 E console : [ERROR] reportJSException >>>> exception function:createInstanceContext, exception:JavaScript execute error!ReferenceError: Can't find variable: WeexPlus
15:47:15.435 47:14.101 5181 5198 E console : [ERROR] reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->ReferenceError: Can't find variable: WeexPlus
15:47:15.459 47:14.101 5181 5198 E console : getTemplateInfo== template md5 c64fedec98b8c62db9bcaeeac99604ad length 13117005 base64 md5 xk/t7Ji4xi25vK7qyZYErQ== response header {"templateSourceBase64MD5":["xk/t7Ji4xi25vK7qyZYErQ=="],"templateSourceMD5":["c64fedec98b8c62db9bcaeeac99604ad"]}
15:47:18.727 47:17.387 5181 5198 E console : [ERROR] reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->ReferenceError: Can't find variable: WeexPlus
15:47:18.755 47:17.387 5181 5198 E console : getTemplateInfo== template md5 c64fedec98b8c62db9bcaeeac99604ad length 13117005 base64 md5 xk/t7Ji4xi25vK7qyZYErQ== response header {"templateSourceBase64MD5":["xk/t7Ji4xi25vK7qyZYErQ=="],"templateSourceMD5":["c64fedec98b8c62db9bcaeeac99604ad"]}
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2019-09-30 14:48