The Simulator can't be launched because it is already in use
I got the solution..
- First of all quit your simulator.
- And then quit and restart Xcode.
- And then run your project.
I hope it will help you...
What might be going on here is that you've terminated the simulator, but you haven't actually terminated the debug session that Xcode still has open with the simulator. You'll notice that the stop button still appears in the top left. The debug session remains open because you never continued from the exception you hit.
You'll be able to kill the debug session by pressing the stop button, or by pressing command+period. After that, you'll be able to build to the simulator again.