從源碼中看：QObject: Cannot create children for a parent that is in a different thread.
直接先上源碼 關於parent->thread()在源碼中的描述： 這個函數白話解釋：當前創建的QObject對象與所傳入的parent是否是在同一個依附線程中創建的，如果不是同一個依附線程則輸出下面令人神志不清，一臉懵逼的打印 結論：創建QObject的對象，如果指定parent，則要在同一個依附線程創建纔不會報這個問題；（屁話:如果不指定parent肯定就不會報）
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