[Qgis-user] Open a .Qgs project file in API, why maps do not show?

[Spartucus]

Hi all,
I'm using QGIS-2.4.0 API. I saved a test.qgs file in QGIS Desktop, in this
project, there is one layer in it.

Then I open the test.qgs project file in QGIS API to developing, but it is
not showed in APP. 

Why is that?
The code I'm using to open the project is:
    QString myProjectPath = "E:\\QGIS\\Pro\\test.qgs";
    Qgsproject::instance()->setFileName(myProjectPath);
    bool isRead = QgsProject::instance()->read();

In Debug mode, isRead equals TRUE.

Any advice would be appreciated!



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