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];
        
    }
    
    
    
    
}