Mac uses a small skill

Xcodeブラックスクリーンの Solutions:

1.CD ~/library/developer/xcode/deriveddata
2.RM-FR *//NOTES:-FR and * are separate
3. Close the emulator, turn off Xcode, and restart Xcode
After restarting I create a new project, run, OK.
I don't know if there is any use for you, you can try it. I think this xcode is a bug. Met many times, really no words.

1-restart Xcode and/or Restart simulator (reset content and settings) and/or restart computer.

2-click on project name in Project Navigator. In Build Settings tab, go to packaging and make sure, ' Product Name ' is the same that the one xcode says simulator is attaching to when running. If they is different, it would fail.

3-go to your Projectname.xcodeproj folder. Inside there delete anything named with your UserID. When you reopen Xcode those files would be recreated and it should work ...

4-manually Delete the Build directory for your project.

5-go to organizer window. Select Projects, select your app in the left hand side and then delete over "Derived Data"

6-check Launch option is set to "automatically" in Product->edit scheme, "Run" scheme.

7-in project-> "Edit schemes"->run. The change of the Debugger from GDB to None (this doesn ' t do sense to me ...).

8-kill the process Gdb-i386-apple-darwin from Activity Monitor. This is assuming GDB are not responding.

9-in "Product"->edit Scheme. In Run, click Yourappname.app, choose and navigate to your. Apps in your project. Now run.

10-check that you don't have the different info.plist in your project. If you don't, remove the bad one.

11- 

Product->edit scheme-> (Select the run Scheme)->debugger->none

Terminalに into moistened:

Launchpadからterminalを Eiken Cable

スクリーンショット

Command+shift+3:

Mac uses a small skill