问题
When I create a new project using the "Messages Application" template of Xcode 8 and try to run it on iOS simulator, I get the following error:
Title
The request to open
com.myDomain.MyAppfailed.
Details
The request was denied by service delegate (
SBMainWorkspace) for reason:NotFound ("Application "com.myDomain.MyApp" is unknown to FrontBoard").
The message is the same for Objective-C and Swift projects.
I don't find any search result for this message yet, so any hint will be helpful. I will update the question as I progress.
Edit
This error occurred with Xcode 8 beta versions.
回答1:
You may want to check your scheme. The executable should be asked on launch (You want to select Messages app). Edit Scheme -> Info -> Executable -> Ask on launch (rather than MyApp.app)
回答2:
This happened to me when I was using a beta of xcode 8.1. When I upgraded the app store version of xcode from 8.0 to 8.1 this problem disappeared (and it never happened with 8.0, just the 8.1 beta). Couldn't find a reference to a bug or a fix, but if you're not using the official app store version of xcode it might be worth double checking.
回答3:
I met the same problem，then i fixed it by two steps:
click the
New Scheme, add a new scheme.click the
Manage Schemes, and delete the old.
then (Although I don't know why) I can run my project!
回答4:
I had the same issue because I had an empty environment variable set in my current scheme.
I deleted this empty environment variable and was then able to build correctly.
来源：https://stackoverflow.com/questions/37939749/xcode-8-messages-template-application-error-on-ios-simulator