qt literacy articles

1. $$ is used to do
   the reference: https: //blog.csdn.net/nwly______/article/details/84073870
   
   

2. $$PWD
   

3. How to generate exe specify a directory:
   CONFIG (Debug): DESTDIR = $PWD/debug CONFIG(release):DESTDIR =$PWD/release
   CONFIG(debug, debug|release):DESTDIR = $$PWD/bin

4. With "#" start to the end of the line.
   Shortcut keys: Ctrl + /

5. quickly remove qt breakpoints
this have to say, qt done very friendly, here is the solution I found:

after entering the F5 breakpoint, if the breakpoint window does not appear, in the blue box below right inside, check breakpoints:


choose one breakpoint, right:

select delete All breakpoints can quickly delete all breakpoints.