问题
I'm testing something in a personal tab (something related to SSO, if that's important in context), and the tab renders fine for about 30 seconds or so, then suddenly gets replaced with an error "There was a problem reaching this app" (the one with the image of a woman and a thought bubble). Does anyone know why this suddenly happens AFTER the tab has ALREADY rendered ok?
回答1:
I finally found an answer to this, so posting in case someone else has the issue. Basically, Teams manifest recently added a capability to show a loading / progress indicator to show users that your tab is still loading. It shows up in the manifest as "showLoadingIndicator" and is boolean (true/false). It can also be set in App Studio of course, as the image below shows.
The problem comes in that the "SDK" link shown in App Studio is flat-out useless - it links to the Teams js Library on GitHub, of all places! It should rather go to this section of this page, which explains how to deal with it. I was originally only calling microsoftTeams.appInitialization.notifyAppLoaded();, but I needed to also call microsoftTeams.appInitialization.notifySuccess().
来源：https://stackoverflow.com/questions/63765776/personal-tab-renders-fine-then-a-few-seconds-later-shows-there-was-a-problem-r