视屏录制

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVCaptureFileOutputRecordingDelegate>

@property(nonatomic ,strong) AVCaptureFileOutput * outPut;

@property(nonatomic ,strong)AVCaptureSession * session;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    //创建输入设备

    AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

      AVCaptureDeviceInput * inputVideo = [[AVCaptureDeviceInput alloc]initWithDevice:device error:nil];

    AVCaptureDevice * audio = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];

    AVCaptureDeviceInput * inpoutAudio = [[AVCaptureDeviceInput alloc]initWithDevice:audio error:nil];

    //创建文件输出设备

     AVCaptureFileOutput * outPut =  [[AVCaptureFileOutput alloc]init];

    self.outPut = outPut;
    //创建会话(加工厂)

    AVCaptureSession * session = [[AVCaptureSession alloc]init];

    self.session = session;

    //判断设备时候能够添加, 可能设备损坏
    if ([session canAddInput:inpoutAudio]) {

        [session addInput:inpoutAudio];

    }

    if ([session canAddInput:inputVideo]) {

        [session addInput:inputVideo];
    }

    if ([session canAddOutput:outPut]) {

        [session addOutput:outPut];
    }

    //创建预览层

    AVCaptureVideoPreviewLayer * preViewLayer = [[AVCaptureVideoPreviewLayer alloc]init];

    //设置frame
    preViewLayer.frame = self.view.bounds;

    //插入到View上

    [self.view.layer insertSublayer:preViewLayer atIndex:0];

    //开始会话

    [session startRunning];

}

- (IBAction)recode:(id)sender {

    if ([self.outPut isRecording]) {

        [self.outPut stopRecording];

    }else{

        NSString * path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject]stringByAppendingPathComponent:@"录制视屏.MP4"];

        [self.outPut startRecordingToOutputFileURL:[NSURL fileURLWithPath:path] recordingDelegate:self];

    }

}