iOS 直播-闪光灯的使用

应用场景是这样的,最近公司决定做一款直播类的软件.

在开发中就遇到了不曾使用过的硬件功能-闪光灯.

这篇博客将简单介绍一下闪光灯的使用.

//

//  ViewController.m

//  iOS torch-test

//

//  Created by caoxu on 16/6/7.

//  Copyright © 2016年 caoxu. All rights reserved.

//

#import "ViewController.h"

#import <AVFoundation/AVFoundation.h>

@interface ViewController ()

@property (nonatomic, strong) AVCaptureSession * session;

@property (nonatomic, strong) AVCaptureDevice * device;

@property (nonatomic, strong) NSTimer * timer;

@end

@implementation ViewController

#pragma mark <setter and getter>

-(AVCaptureSession *)session

{

    if(_session == nil)

    {

        _session = [[AVCaptureSession alloc] init];

    }

    return _session;

}

-(AVCaptureDevice *)device

{

    if(_device == nil)

    {

        _device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

    }

    return _device;

}

#pragma mark <life cycle>

- (void)viewDidLoad {

    [super viewDidLoad];

    AVCaptureDeviceInput * input = [[AVCaptureDeviceInput alloc]initWithDevice:self.device error:nil];

    if ([self.session canAddInput:input]) {

        [self.session addInput:input];

    }

}

#pragma mark <method>

- (IBAction)torchon:(id)sender {

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

    {

        if(self.device.torchMode == AVCaptureTorchModeOff)

        {

            [self.session beginConfiguration];

            [self.device lockForConfiguration:nil];

            [self.device setTorchMode:AVCaptureTorchModeOn];

            [self.device setFlashMode:AVCaptureFlashModeOn];

            [self.device unlockForConfiguration];

            [self.session commitConfiguration];

        }

    }

    [self.session startRunning];

}

- (IBAction)torchoff:(id)sender {

    [self.session beginConfiguration];

    [self.device lockForConfiguration:nil];

    if(self.device.torchMode == AVCaptureTorchModeOn)

    {

        [self.device setTorchMode:AVCaptureTorchModeOff];

        [self.device setFlashMode:AVCaptureFlashModeOff];

    }

    [self.device unlockForConfiguration];

    [self.session commitConfiguration];

    [self.session stopRunning];

}

@end