Error output from Xcode build:
2020-01-13 20:03:25.739 xcodebuild[21027:188976] DTDeviceKit: deviceType from was NULL
2020-01-13 20:03:25.849 xcodebuild[21027:189015] DTDeviceKit: deviceType from was NULL
** BUILD FAILED **
Xcode's output:
note: Using new build systemnote: Planning buildnote: Constructing build descriptionerror: No account for team "". Add a new account in the Accounts preference pane or verify that your accounts have valid credentials. (in target 'Runner' from project 'Runner')error: No profiles for 'com.exam.startupNamer' were found: Xcode couldn't find any iOS App Development provisioning profiles matching 'com.exam.startupNamer'. (in target 'Runner' from project 'Runner')
Could not build the precompiled application for the device.
Error launching application on iPhone.
解决办法：
使用Xcode打开Runner.xcworkspace，选择正确的证书。
