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我是 Swift/iOS 开发的新手,正在将 Swift 3.0 项目转换为 Swift 4.2 以支持更新的设备。

在此过程中,我收到以下错误:

无法将类型“[String]”的值分配给类型“[AVMetadataObject.ObjectType]?”

以下是引发错误的代码行:

let metadataOutput = AVCaptureMetadataOutput()

metadataOutput.metadataObjectTypes = [convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.upce),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.code39),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.code39Mod43),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.ean13),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.ean8),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.code93),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.code128),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.pdf417),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.aztec),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.interleaved2of5),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.itf14),
                                      convertFromAVMetadataObjectObjectType(AVMetadataObject.ObjectType.dataMatrix)]// Support for AVMetadataObjectTypeQRCode / qr code is removed from the list.
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1 回答 1

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迁移者尽其所能提供帮助,但有时这种帮助具有误导性。

您可以仅使用静态成员填充数组

metadataOutput.metadataObjectTypes = [.upce, .code39, .code39Mod43, .ean13, .ean8, .code93, .code128, .pdf417, .aztec, .interleaved2of5, .itf14, .dataMatrix]
于 2019-09-16T20:10:23.183 回答