如何打开/关闭iPhone相机闪光灯? [英] How to turn the iPhone camera flash on/off?
本文介绍了如何打开/关闭iPhone相机闪光灯?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何以程式方式开启/关闭iPhone的LED相机闪光灯?
How can I turn the iPhone's LED camera flash on/off programatically?
推荐答案
#import <AVFoundation/AVFoundation.h>
...
- (void) turnTorchOn: (bool) on {
// check if flashlight available
Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");
if (captureDeviceClass != nil) {
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if ([device hasTorch] && [device hasFlash]){
[device lockForConfiguration:nil];
if (on) {
[device setTorchMode:AVCaptureTorchModeOn];
[device setFlashMode:AVCaptureFlashModeOn];
//torchIsOn = YES; //define as a variable/property if you need to know status
} else {
[device setTorchMode:AVCaptureTorchModeOff];
[device setFlashMode:AVCaptureFlashModeOff];
//torchIsOn = NO;
}
[device unlockForConfiguration];
}
} }
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