I have breakpoints set but Xcode appears to ignore them.
Why aren't my breakpoints working?
For Xcode 4:
go Product -> Debug -> Activate Breakpoints
Thing to try :
1 ) restart xcode 2 ) select another simulator -- which was my case 3 ) reboot mac.
if none of this works. then look at the project settings. ( which is leeast possible thing. )
In my case, I found out that the breakpoints have been accidentally deactivated. You can reactivate it again via Debug->Activate Breakpoints [Cmd+Y]. If you notice grey'ed out breakpoint markers instead of the usual blue marker, this is likely the case.
As it turned out you can always toggle breakpoints activation with Cmd+Y keys, you might have hits this combination key not noticing it. This report is based on Xcode 7.2.