Turn Flashlight on/off

Code is relatively simple, just a few lines, no nonsense, also do not explain, directly on the code bar.

1. import Header File

1 #import <AVFoundation/AVFoundation.h>

2, click the button to achieve:

1-(Ibaction) Torchontouchbutton: (UIButton *) sender{2Class Capturedeviceclass = nsclassfromstring (@"Avcapturedevice");//Equipment Class3     if(Capturedeviceclass! =Nil) {4Avcapturedevice *device = [Avcapturedevice defaultdevicewithmediatype:avmediatypevideo];//input5         if([Device Hastorch]) {//determine if there is a flash6[Device Lockforconfiguration:nil];//request exclusive access to hardware devices7             if(Sender.tag = =0) {8Sender.tag =1;9[Device Settorchmode:avcapturetorchmodeon];//Flashlight OpenTen}Else{ OneSender.tag =0; A[Device Settorchmode:avcapturetorchmodeoff];//Flashlight Off -             } -[Device unlockforconfiguration];//request exclusive access to hardware devices the         } -     } -}

Turn Flashlight on/off