//
//  ViewController.m
//  Flash
//
//  Created by fe on 2017/1/3.
//  Copyright © 2017年 fe. All rights reserved.
//#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>//调用闪光灯需要导入该框架
@interface ViewController ()- (IBAction)openFlash:(UIButton *)sender;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}- (IBAction)openFlash:(UIButton *)sender {sender.selected = !sender.selected;if (sender.isSelected == YES) { //打开闪光灯AVCaptureDevice *captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];NSError *error = nil;if ([captureDevice hasTorch]) {BOOL locked = [captureDevice lockForConfiguration:&error];if (locked) {captureDevice.torchMode = AVCaptureTorchModeOn;[captureDevice unlockForConfiguration];}}}else{//关闭闪光灯AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];if ([device hasTorch]) {[device lockForConfiguration:nil];[device setTorchMode: AVCaptureTorchModeOff];[device unlockForConfiguration];}}}
- (IBAction)closeFlash:(UIButton *)sender {}@end