1、添加录音和拍摄权限

NSMicrophoneUsageDescription

Privacy - Camera Usage Description

2、代码

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <MobileCoreServices/MobileCoreServices.h>// 接下来是你的 ViewController 的实现代码，不需要修改。@interface ViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>@property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) NSURL *videoURL;
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) AVPlayerLayer *playerLayer;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// 创建显示视频的视图self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(50, 100, 200, 200)];[self.view addSubview:self.imageView];// 创建拍摄视频按钮UIButton *recordVideoButton = [UIButton buttonWithType:UIButtonTypeSystem];[recordVideoButton setTitle:@"拍摄视频" forState:UIControlStateNormal];recordVideoButton.frame = CGRectMake(50, 350, 100, 50);[recordVideoButton addTarget:self action:@selector(recordVideo) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:recordVideoButton];
}- (void)recordVideo {// 检查相机是否可用if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Error" message:@"相机不可用" preferredStyle:UIAlertControllerStyleAlert];[alert addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil]];[self presentViewController:alert animated:YES completion:nil];return;}// 创建 UIImagePickerControllerUIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;imagePicker.mediaTypes = @[(NSString *)kUTTypeMovie];imagePicker.delegate = self;[self presentViewController:imagePicker animated:YES completion:nil];
}// 拍摄视频完成后调用的代理方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey, id> *)info {NSString *mediaType = info[UIImagePickerControllerMediaType];if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) {self.videoURL = info[UIImagePickerControllerMediaURL];[self displayVideo];}[picker dismissViewControllerAnimated:YES completion:nil];
}// 用户取消拍摄视频时调用的代理方法
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {[picker dismissViewControllerAnimated:YES completion:nil];
}// 显示拍摄的视频
- (void)displayVideo {AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:self.videoURL];self.player = [AVPlayer playerWithPlayerItem:playerItem];self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];self.playerLayer.frame = CGRectMake(50, 100, 200, 200);[self.view.layer addSublayer:self.playerLayer];[self.player play];
}@end