Xcode4 how to debug a program started by pushnotification or custom URL Scheme

ProgramIf it is started by another program, how can we debug it? Xcode3 has been introduced online, see: http://oleb.net/blog/2010/05/how-to-debug-app-launched-by-remote-event/

I tried it in xcode3, but it failed. Somehow, I installed two versions of xcode, xcode3 and xcode4.

After research, xcode4 can successfully debug the program started by pushnotification or custom URL scheme,

First open scheme, for example:

Then modify the launch option to: Wait for to XXX launch, for example:

In this way, when you debug the program, the program will not run and will start when you receive the next launch message. The next launch message is push notification or custom URL scheme launch.