luojigou_app/r_scan: 扫码工具修复 @ null-safety

zhaoyadi 635db96fda first commit		4 жил өмнө
..
Assets.xcassets	635db96fda first commit	4 жил өмнө
Base.lproj	635db96fda first commit	4 жил өмнө
AppDelegate.h	635db96fda first commit	4 жил өмнө
AppDelegate.m	635db96fda first commit	4 жил өмнө
Info.plist	635db96fda first commit	4 жил өмнө
main.m	635db96fda first commit	4 жил өмнө