libQtGui.so.4动态库的问题

./comDemo:error while loading shared libraries:libQtGui.so.4:cannot open shared object file: No such file or directory  ;据说是却反动态库的原因，请问大神们怎么安装动态库结局这个问题啊？求大家指教，谢谢大家{:1_1:}