问题
I working on swift for Ios App. I want to phone user connect specific wifi. So i open iphone wifi settings by NSURL like this. After then my app go to background and i control ssid every 500ms in background by background task like this. When phone connect the specific wifi i can see this status and i stop background task. But i cant comes my app to foreground. I tried open my app use NSURL metod like this video (i add custom url my info.plist and add application function in my appdelagate) but my app has no return use this metod.
回答1:
unfortunately bringing an app from background to foreground is not possible. You can however send a notification or a badge for the user to click and open the app. The user should have notifications enabled for this to work.
Happy Coding!
来源：https://stackoverflow.com/questions/38074650/how-to-come-ios-app-to-foreground-from-background