Is a connected iOS device required for a successful build in Xcode? -

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i'm new xcode , first project simple ios 8 app share extension target. noticed files marked in red (missing) if select >product >build. if same thing connected device went red black , build successful. why need connect device successful build?

@matt, depends on profile building for. i'll attach image of current build profiles have selected in xcode 6.1.xcode build profiles if target simulator, gonna want click play button, , project copied simulator selected, , launched. when build app device, select >product >build because don't have apple developer's license, still builds myapp.app binary / executable project in derived data location specified preferences. hope answer helps out.


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