Xcode compiles my App, but can't run it in the simulator

Question

when i compile my app, Xcode just says \"Attaching to Projectname...\" and gets stuck there. The debugger just prints this out:

error: failed to attac

Answer 1

try to do next steps:

• Go to Product/Scheme/Edit Scheme then select Run section.
• Select Info Tan and set Debugger None.
• Run project. It must be working (without debugger)
• Go back to Edit Scheme and selecet debugger LLDB
• Run project. It is working.

Maybe additionally you need to delete derived data and do Product/Clean