Understanding when to call retain on an object?

Question

When should retain be used ? I understand that it increments the object references count, so basicly the next release on that object will not call

Answer 1

I usually just use retain explicitly when there is a need to and the Xcode debugger tells me what just happened when such a situation arises. Usually for whatever reason (mismanagement on the developer's part or if there is some release going on behind the scenes), you do anything on a released object, you'd get a crash. Just read the log on the console, see the debugger on Xcode when you debug and you figure out usually which object is causing the problem.