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                                            vjieshao

Xcode 12 模拟器上运行报错：Value of type 'AVMetadataMachineReadableCodeObject' has no member 'corners'

应该增加#if !targetEnvironment(simulator)判断。真机运行是没问题的。来源：https://developer.apple.com/forums/thread/658471 原话：This happened before and is related to how obj-c symbols are imported in Swift, not deprecation/removal of API. corners at least exists in the non-simulator SDK, so...

Xcode 12 模拟器上运行报错：Value of type 'AVMetadataMachineReadableCodeObject' has no member 'corners'

> > > 应该增加#if !targetEnvironment(simulator)判断。真机运行是没问题的。 > > > 来源：https://developer.apple.com/forums/thread/658471 > > > 原话：This happened before and is related to how obj-c symbols are imported in Swift, not deprecation/removal of API....