create QQmlEngine in other threads

//code

while(true){

QQmlEngine* engine=new QQmlEngine

{ QQmlComponent com(engine) com.load("D:/1.qml") QObject *ob=com.createOb(); delete ob; }

delete engine;

}

//comment

when  execute code in 5 threads ,it will crash,can QQmlEngine  be used in other thread???

 

//code

class MyThread：public QThread{

 void run(){

  if(!engine)

 engine=new QQmlEngine

 

if(!d_ob)

{  QQmlComponent com(engine)  com.load("D:/1.qml") d_ob=com.createOb(); }

return QThread::run();

}

 

private:

QQmlEngine* engine=null

QObject*d_ob=null

}

//comment

while 1.qml has Timer (QtQml 2.2) Component,when start and end thread and start thread,

it will crash,

when start thread  and end thread ,start thread  and end thread ,start thread  and end thread ，start thread  and end thread .....,it will lead to memery leak

 

 

//code

import QtQuick.Controls 1.4

BusyIndicator

{   }

//comment

when BusyIndicator in  QtQuick.Controls 1.4  create and destroyed,it will lead to momery leak

when .js file is not （ .pragma lib）, create and destroyed,it will lead to memery leak