QT Must be called on Chrome_UIThread； actually called on Unknown Thread.

• 具体错误

[4448:9040:0109/135034.634:FATAL:render_frame_host_impl.cc(672)] Check failed: ::content::BrowserThread::CurrentlyOn(BrowserThread::UI). Must be called on Chrome_UIThread; actually called on Unknown Thread.
Backtrace:
	QWebEngineUrlSchemeHandler::qt_static_metacall [0x00007FFFA9DF24D2+994866]
	QWebEngineUrlSchemeHandler::qt_static_metacall [0x00007FFFA9D876CC+557100]
	QWebEngineUrlSchemeHandler::qt_static_metacall [0x00007FFFA9D87683+557027]
	QWebEngineUrlSchemeHandler::qt_static_metacall [0x00007FFFA9CFFFAE+2318]
	GetHandleVerifier [0x00007FFFACB15F0F+47108287]
	GetHandleVerifier [0x00007FFFACB15E27+47108055]
	GetHandleVerifier [0x00007FFFACC1E651+48191489]
	QtWebEngineCore::WebContentsAdapter::runJavaScript [0x00007FFFA61C4871+193]
	QWebEngineHistory::currentItemIndex [0x00007FF81C758937+87637]
	BaiduMapWidget::callToWeb [0x00007FF7689B42EB+43] (D:\SVN-WORK\branch\BaiduMap\BaiduMapWidget.cpp:55)
	BaiduMapWidget::targetAdd [0x00007FF7689B3B60+672] (D:\SVN-WORK\branch\BaiduMap\BaiduMapWidget.cpp:129)
	RadarWorker::run [0x00007FF7689B8813+355] (D:\SVN-WORK\branch\BaiduMap\RadarWorker.cpp:24)
	QTextStream::realNumberPrecision [0x00007FFFE629AA8B+564878]
	BaseThreadInitThunk [0x00007FF874C4E8D7+23]
	RtlUserThreadStart [0x00007FF87523FBCC+44]

• 解决办法

出错是因为调用时，不在期望的线程中。参考：

QMetaObject::invokeMethod使用方法-CSDN博客