iOS 直播-闪光灯的使用

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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 
    
     @interface ViewController ()@property (nonatomic, strong) AVCaptureSession * session;@property (nonatomic, strong) AVCaptureDevice * device;@property (nonatomic, strong) NSTimer * timer;@end@implementation ViewController#pragma mark 
     
      -(AVCaptureSession *)session{    if(_session == nil)    {        _session = [[AVCaptureSession alloc] init];    }    return _session;}-(AVCaptureDevice *)device{    if(_device == nil)    {        _device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];    }    return _device;}#pragma mark 
      
       - (void)viewDidLoad {    [super viewDidLoad];    AVCaptureDeviceInput * input = [[AVCaptureDeviceInput alloc]initWithDevice:self.device error:nil];    if ([self.session canAddInput:input]) {                [self.session addInput:input];            }    }#pragma mark 
       
        - (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