Ubuntu下安装Qt

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方法一：
sudo apt-get install qt4-dev-tools
sudo apt-get install qtcreator

方法二：

chmod u+x qt-sdk-linux-x86-opensource-2010.01.bin

./qt-sdk-linux-x86-opensource-2010.01.bin

按步骤安装即可，

我这里安装到/usr/qtsdk-2010.01目录下，

然后，gedit ~/bashrc

在最后一行处加上

PATH=$PATH:/usr/qtsdk-2010.01/qt/bin

export PATH

即可。

这里既安装了qtsdk，又安装了qtcreator。

1、运行qtcreator可能会显示No valid Qt version set. Set one in Tools/Options之类的信息

“安装完毕之后，新建一个工程，发现如题所示的error，version有问题。在网上查了下，很多人都有碰到，但是都没有写明如何解决，其实，解决方法在Qt Creator的帮助文件里就有提到了：

Term	Meaning
Auto-detected Qt	The version of Qt installed on your system. This is the Qt version for the`qmake` command found in your `PATH`.
Default Qt	The version of Qt configured in Tools -> Options -> Qt 4 -> Default Qt Version. This is the Qt version used by your new projects. It defaults to Auto-detected Qt.
Project Qt	The version of Qt configured in Build&Run -> Build Settings -> Build Configurations. This is the Qt version that is actually used by a particular project. It defaults to Default Qt.
Shadow Build	Shadow building means building a project in a separate directory, the build directory. The build directory is different from the source directory. One of the benefits of shadow building is that it keeps your source directory clean. Shadow building is the best practice if you need many build configurations for a single set of source.