How to fix “SWIFT_VERSION '3.0' is unsupported, supported versions are: 4.0, 4.2, 5.0” error in Xcode 10.2?

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情歌与酒
情歌与酒 2020-11-30 23:48

I\'m trying to run downloaded from app, try to open in Xcode and have an error:

\" Showing Recent Messages
:-1: SWIFT_VERSION \'3.0\' is unsu

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