QCamera支持多摄像头切换显示

[{"title":"（ 7 个子文件 9KB ） QCamera支持多摄像头切换显示","children":[{"title":"QCameraT1","children":[{"title":"QCameraT1.pro <span style='color:#111;'> 1.05KB </span>","children":null,"spread":false},{"title":"QCameraT1.pro.user <span style='color:#111;'> 23.24KB </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 172B </span>","children":null,"spread":false},{"title":"mainwindow.ui <span style='color:#111;'> 5.56KB </span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'> 6.47KB </span>","children":null,"spread":false},{"title":"mainwindow.h <span style='color:#111;'> 1.00KB </span>","children":null,"spread":false},{"title":"QCameraT1.pro.user.c7564e3 <span style='color:#111;'> 23.56KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]