iOS 调用闪光灯

最新推荐文章于 2021-12-09 00:03:58 发布

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最新推荐文章于 2021-12-09 00:03:58 发布

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分类专栏： --------照相_摄像头

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本文介绍如何通过用户界面开关实现相机闪光灯的开启与关闭，并在代码中详细阐述了控制过程，包括配置相机设备、调整闪光模式及运行状态等关键步骤。

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//普通开关模式

-
 (IBAction)changeMode:(UISwitch *)sender {

    if(sender.on)

    {

        //打开闪光灯

        NSLog(@"ON");

        self.sosStartBtn.enabled
 = NO;

        self.sosStopBtn.enabled
 = NO;

        if([self.captureDevice
 hasTorch] && [self.captureDevice hasFlash])

        {

            if(self.captureDevice.torchMode
 == AVCaptureTorchModeOff)

            {

                [self.captureSession
 beginConfiguration];

                [self.captureDevice
 lockForConfiguration:nil];

                [self.captureDevice
 setTorchMode:AVCaptureTorchModeOn];

                [self.captureDevice
 setFlashMode:AVCaptureFlashModeOn];

                [self.captureDevice
 unlockForConfiguration];

                [self.captureSession
 commitConfiguration];

            }

        }

        [self.captureSession
 startRunning];

    }

    else

    {

        //关闭闪光灯

        NSLog(@"Off");

        self.sosStartBtn.enabled
 = YES;

        self.sosStopBtn.enabled
 = YES;

        [self.captureSession
 beginConfiguration];

        [self.captureDevice
 lockForConfiguration:nil];

        if(self.captureDevice.torchMode
 == AVCaptureTorchModeOn)

        {

            [self.captureDevice
 setTorchMode:AVCaptureTorchModeOff];

            [self.captureDevice
 setFlashMode:AVCaptureFlashModeOff];

        }

        [self.captureDevice
 unlockForConfiguration];

        [self.captureSession
 commitConfiguration];

        [self.captureSession
 stopRunning];

    }

}