问题
I'm getting this warning in Xcode 10.2.
Conversion to swift 5 is available
When i click this error it's opening this window
When we click NEXT what will happen...
回答1:
current version of swift is swift5 which only supported in xcode 10.2 and you are using another version like swift4 or swift4.2 in xcode 10.2 . This warning means that a new version of swift is available if you click this warning a you will receive a pop up and will ask for permission to convert your code in leatest version of swift (which is now swift5) . if you click yes to the pop up xcode automatically convert you code to newwst version of swift(which is swift5 in you case)
来源：https://stackoverflow.com/questions/55789899/conversion-to-swift-5-is-available