qt creator 安装后，运行自带的例子，总是通不过，请问啥原因？
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先安装了的qt library，然后对qt library进行了设置，编译等操作，并且将其bin目录设置为环境变量了
然后安装qt creator，安装完成后，运行它自带的一些例子，配置时出现如下提示：
D:/Program/Qt_Creator/Examples/Qt-5.3/quick/demos/maroon/maroon.pro(4): 'qtHaveModule' is not a recognized test function.
Project MESSAGE: Warning: unknown QT: qml
Project MESSAGE: Warning: unknown QT: quick
D:/Program/Qt_Creator/Examples/Qt-5.3/quick/demos/maroon/maroon.pro(4): 'qtHaveModule' is not a recognized test function.
Project MESSAGE: Warning: unknown QT: qml
Project MESSAGE: Warning: unknown QT: quick
D:/Program/Qt_Creator/Examples/Qt-5.3/quick/demos/maroon/maroon.pro(4): 'qtHaveModule' is not a recognized test function.
Project MESSAGE: Warning: unknown QT: qml
Project MESSAGE: Warning: unknown QT: quick
D:/Program/Qt_Creator/Examples/Qt-5.3/quick/demos/maroon/maroon.pro(4): 'qtHaveModule' is not a recognized test function.
Project MESSAGE: Warning: unknown QT: qml
Project MESSAGE: Warning: unknown QT: quick
运行时，出现错误提示：
d:\Program\Qt_Creator\Examples\Qt-5.3\quick\demos\maroon\maroon.pro:4: error: Unknown test function: qtHaveModule
d:\Program\Qt_Creator\Examples\Qt-5.3\quick\demos\maroon\maroon.pro:4: error: Unknown test function: qtHaveModule
d:\Program\Qt_Creator\Examples\Qt-5.3\quick\demos\maroon\maroon.pro:4: error: Unknown test function: qtHaveModule
D:\Program\Qt_Creator\Examples\Qt-5.3\quick\demos\maroon\main.cpp:40: In file included from ..\maroon\main.cpp:40:0:
D:\Program\Qt_Creator\Examples\Qt-5.3\quick\shared\shared.h:41: error: QGuiApplication: N
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