Based on my reading around, I have learned that I need to set a variable in my AppDelegate that references my view controller so that I can do things like this. Receive a barcode scan and subsequently call a method in a controller and pass in that barcode scan. So I have this in my AppDelegate.Based on my reading around, I have learned that
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如何在引用已初始化的Storyboard ViewController的AppDelegate中设置变量
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