解决 QtCreator 3.5.1无法输入中文的问题
解决 QtCreator 3.5.1无法输入中文的问题
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环境是ubuntu 15.10
ubuntu软件源中下载安装的fctix-libs-qt5现在没有用，版本太旧了。
自己下载fctix-qt5的源码来编译即可。
1、获取fctix-qt5源码
我没有找到fcitx-qt5的git仓库地址，只找到了源码包的下载地址。
先下载源码包，并解压。
wget https://download.fcitx-im.org/fcitx-qt5/fcitx-qt5-1.0.5.tar.xz
tar -xJf fcitx-qt5-1.0.5.tar.xz找到了git仓库地址
git clone http://github.com/fcitx/fcitx-qt5.git2、生成Makefile文件
这一步很简单，进入源码目录，然后新建一个build的目录并进入，然后使用cmake来生成Makefile
cd fcitx-qt5
mkdir build && cd build
cmake ..这一个步骤产生了几个错误，这和系统环境有关。如果你的没有产生错误，后面就不用看了
2.1、没有找到"ECM"包配置文件报错
错误信息
cmake ..
-- The C compiler identification is GNU 5.2.1
-- The CXX compiler identification is Clang 3.7.0
... ...
-- Detecting CXX compile features - done
CMake Error at CMakeLists.txt:8 (find_package):
Could not find a package configuration file provided by "ECM" (requested
version 1.4.0) with any of the following names:
ECMConfig.cmake
ecm-config.cmake
Add the installation prefix of "ECM" to CMAKE_PREFIX_PATH or set "ECM_DIR"
to a directory containing one of the above files. If "ECM" provides a
separate development package or SDK, be sure it has been installed.
-- Configuring incomplete, errors occurred!
See also "/home/o/fcitx/fcitx-qt5/CMakeFiles/CMakeOutput.log".解决办法
先下载cmake的扩展模块包
wget https://launchpadlibrarian.net/189487929/extra-cmake-modules_1.4.0.orig.tar.xz
tar -xJf extra-cmake-modules_1.4.0.orig.tar.xz进入其中，然后执行cmake .来生成Makefile文件
这一步需要制定两个变量
//The directory containing a CMake configuration file for Qt5Core.
Qt5Core_DIR:PATH=/home/o/program/qt_5.5/qt_5.5.1_x64/5.5/gcc_64/lib/cmake/Qt5Core
//The directory containing a CMake configuration file for Qt5LinguistTools.
Qt5LinguistTools_DIR:PATH=/home/o/program/qt_5.5/qt_5.5.1_x64/5.5/gcc_64/lib/cmake/Qt5LinguistTools生成了Makefile之后，直接sudo make install来安装就可以了。
2.2、找不到Qt5包配置文件的错误
报错信息
CMake Error at CMakeLists.txt:29 (find_package):
Could not find a package configuration file provided by "Qt5" (requested
version 5.1.0) with any of the following names:
Qt5Config.cmake
qt5-config.cmake
Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
to a directory containing one of the above files. If "Qt5" provides a
separate development package or SDK, be sure it has been installed.
-- Configuring incomplete, errors occurred!
See also "/home/o/fcitx/fcitx-qt5/build/CMakeFiles/CMakeOutput.log".这个错误很好解决，设置变量Qt5_DIR即可
cmake -DQt5_DIR=/home/o/program/qt_5.5/qt_5.5.1_x64/5.5/gcc_64/lib/cmake/Qt5 ..2.3、libxkbcommon问题
错误信息
o@o-pc:~/fcitx/fcitx-qt5/build$ cmake -DQt5_DIR=/home/o/program/qt_5.5/qt_5.5.1_x64/5.5/gcc_64/lib/cmake/Qt5 ..
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.28")
-- Found XKBCommon_XKBCommon: /usr/lib/x86_64-linux-gnu/libxkbcommon.so (found version "0.5.0")
-- Found XKBCommon: /usr/lib/x86_64-linux-gnu/libxkbcommon.so (found suitable version "0.5.0", minimum required is "0.5.0") found components: XKBCommon
-- checking for module 'fcitx-utils'
-- package 'fcitx-utils' not found
CMake Error at /usr/share/cmake-3.2/Modules/FindPkgConfig.cmake:344 (message):
A required package was not found
Call Stack (most recent call first):
/usr/share/cmake-3.2/Modules/FindPkgConfig.cmake:506 (_pkg_check_modules_internal)
CMakeLists.txt:32 (pkg_check_modules)
-- Configuring incomplete, errors occurred!
See also "/home/o/fcitx/fcitx-qt5/build/CMakeFiles/CMakeOutput.log".这个问题的解决如下
先下载libxkbcommon-0.5.0.tar.xz，然后解压编译
http://xkbcommon.org/download/libxkbcommon-0.5.0.tar.xz
tar -xJf libxkbcommon-0.5.0.tar.xz这个使用./configure --disable-x11来生成Makefile。禁用x11是因为我机器上的x11版本过高的原因。
编译的时候可能会报错
make
YACC src/xkbcomp/parser.c
./build-aux/ylwrap: 行 176: yacc: 未找到命令
Makefile:1522: recipe for target 'src/xkbcomp/parser.c' failed
make: *** [src/xkbcomp/parser.c] Error 127需要yacc的支持。这个工具包含在软件包bison中。
o@o-pc:~/fcitx/libxkbcommon-0.5.0$ sudo apt-get install bison然后直接make && make install安装就是。
2.4、'fcitx-utils' not found错误
这个错误是因为我们没有安装fcitx-libs-dev的缘故，所以解决的办法就是安装它就是。
错误信息
o@o-pc:~/fcitx/fcitx-qt5/build$ cmake -DQt5_DIR=/home/o/program/qt_5.5/qt_5.5.1_x64/5.5/gcc_64/lib/cmake/Qt5 ..
-- checking for module 'fcitx-utils'
-- package 'fcitx-utils' not found
CMake Error at /usr/share/cmake-3.2/Modules/FindPkgConfig.cmake:344 (message):
A required package was not found
Call Stack (most recent call first):
/usr/share/cmake-3.2/Modules/FindPkgConfig.cmake:506 (_pkg_check_modules_internal)
CMakeLists.txt:32 (pkg_check_modules)
-- Configuring incomplete, errors occurred!解决办法
sudo apt-get install fcitx-libs-dev 3、编译出动态库
经过上面的步骤，生成了Makefile文件后，接下来的步骤就很简单了，直接make来编译即可。
make
Scanning dependencies of target FcitxQt5DBusAddons_automoc
[ 4%] Automatic moc for target FcitxQt5DBusAddons
... ... 中间步骤省略
Linking CXX shared module libfcitxplatforminputcontextplugin.so
[100%] Built target fcitxplatforminputcontextplugin进入构建目录下的platforminputcontext目录，即可看到生成的libfcitxplatforminputcontextplugin.so文件
将其拷贝到QtCreator安装目录下的..../QtCreator/bin/plugins/platforminputcontexts目录下即可。
o@o-pc:~/fcitx/fcitx-qt5/build/platforminputcontext$ ls
CMakeFiles cmake_install.cmake fcitxplatforminputcontextplugin_automoc.cpp libfcitxplatforminputcontextplugin.so Makefile moc_main.cpp moc_qfcitxplatforminputcontext.cppcp libfcitxplatforminputcontextplugin.so /home/o/program/qt_5.5/qt_5.5.1_x64/Tools/QtCreator/bin/plugins/platforminputcontexts/