运行输出为:
Starting D:\MAP\build-TestChart-Desktop_Qt_5_7_0_MinGW_32bit-Debug\debug\TestChart.exe...
QML debugging is enabled. Only use this in a safe environment.
ASSERT: "!"No style available without QApplication!"" in file kernel\qapplication.cpp, line 1123
ASSERT: "!"No style available without QApplication!"" in file kernel\qapplication.cpp, line 1123
D:\MAP\build-TestChart-Desktop_Qt_5_7_0_MinGW_32bit-Debug\debug\TestChart.exe exited with code 255