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如果您正在处理一个项目并且 iPhone 相机没有通过数据(您确实得到一个视图),当前设置为 AVCaptureSession.Preset.Photo 。
尝试切换到 AVCaptureSession.Preset.high 。iPhone X 及以上版本可以搭配 .Photo,但较低版本会卡在上面。