objc4-750

mac OS 10.14
Xcode 10.1
objc4-750

2021年2月5号编译时提示：

报错：Undefined symbols for architecture x86_64: "_objc_opt_class", referenced from: 把objc对应的deployment改为10.14

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Language:Objective-C++ 52.1%Language:C++ 17.5%Language:Assembly 10.8%Language:C 10.1%Language:Objective-C 8.4%Language:Rich Text Format 1.0%Language:Batchfile 0.1%Language:DTrace 0.0%