SWIFT_VERSION '3.0' is unsupported, supported versions are: 4.0, 4.2, 5.0. (in t

今天写学习swift的时候遇到个错误,本身顺便记录一下,完整错误信息以下swift

SWIFT_VERSION '3.0' is unsupported, supported versions are: 4.0, 4.2, 5.0. (in target '')
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去Build Setting中把Swift Language Version下改成Swift 4或者5便可bash

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