Determine if the current device's camera is available in IOS

In iOS development, it is often necessary to call the camera to scan something like two-dimensional, before calling, you should first determine whether the current device's camera is available;

Directly below the code: (the wording in Swift)

1 classWncommontool:nsobject {2     /**3 4 determine if the current device's camera is available5 6 : Returns: Whether the camera of the current device is available7 8     */9 Ten     classFunc iscameraavailable ()bool{ One  A         returnUiimagepickercontroller.iscameradeviceavailable (. Rear) && -  - uiimagepickercontroller.issourcetypeavailable (. Camera) the     }  -  -}

Use the following method (in Swift):

1 //MARK: scanning QR code2 3 func scanqr () {4 5         ifwncommontool.iscameraavailable () {6 7             //dosomething8 9}Else{Ten  OneUialertview (title:"Warm Tips", Message:"Current device camera is not available",Delegate: Self, Cancelbuttontitle:"Determine"). Show () A         } -  -}

Determine if the current device's camera is available in IOS