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iOS自定义相机实现拍照、录制视频

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 27 4
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这篇CFSDN的博客文章iOS自定义相机实现拍照、录制视频由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

本文实例为大家分享了iOS自定义相机实现拍照、录制视频的具体代码，供大家参考，具体内容如下 。

使用AVFoundation框架.

这里是Demo 。

首先声明以下对象:

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#import "CustomeCameraViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>
 
@interface CustomeCameraViewController ()<AVCaptureFileOutputRecordingDelegate>
 
{
   // AVCaptureSession对象来执行输入设备和输出设备之间的数据传递
   AVCaptureSession *iSession;
   //当前设备
   AVCaptureDevice *iDevice;
   //输入设备
   AVCaptureDeviceInput *iDeviceInput;
   //照片输出流
   AVCaptureStillImageOutput *iStillImageOutput;
   //预览图层
   AVCaptureVideoPreviewLayer *iPreviewLayer;
  
}

初始化各对象:

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- ( void )viewDidLoad {
   [super viewDidLoad];
  
   //点击屏幕对焦
   UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(focusTap:)];
   [self.view addGestureRecognizer:tap];
  
  
   iSession = [[AVCaptureSession alloc]init];
  
   NSArray *deviceArray = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
   for (AVCaptureDevice *device in deviceArray) {
    
     //AVCaptureDevicePositionBack 后置摄像头
     //AVCaptureDevicePositionFront 前置摄像头
     if (device.position == AVCaptureDevicePositionBack) {
       iDevice = device;
     }
   }
  
  
   iSession.sessionPreset = [self getSessionPresetForDevice:iDevice];
  
   iDeviceInput = [[AVCaptureDeviceInput alloc]initWithDevice:iDevice error:nil];
  
  
   ////输出设置。AVVideoCodecJPEG  输出jpeg格式图片
   iStillImageOutput = [[AVCaptureStillImageOutput alloc]init];
   NSDictionary *outputDic = [NSDictionary dictionaryWithObjectsAndKeys:AVVideoCodecJPEG,AVVideoCodecKey, nil];
   [iStillImageOutput setOutputSettings:outputDic];
  
  
   //更改这个设备设置的时候必须先锁定设备，修改完后再解锁，否则崩溃
   [iDevice lockForConfiguration:nil];
   if ([iDevice isFlashModeSupported:AVCaptureFlashModeOff]) {
     [iDevice setFlashMode:AVCaptureFlashModeOff];
   }
   if ([iDevice isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
     [iDevice setFocusMode:AVCaptureFocusModeAutoFocus];
   }
   if ([iDevice isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeAutoWhiteBalance]) {
     [iDevice setWhiteBalanceMode:AVCaptureWhiteBalanceModeAutoWhiteBalance];
   }
   [iDevice unlockForConfiguration];
  
   if ([iSession canAddInput:iDeviceInput]) {
     [iSession addInput:iDeviceInput];
   }
   if ([iSession canAddOutput:iStillImageOutput]) {
     [iSession addOutput:iStillImageOutput];
   }
   if ([iSession canAddOutput:iVideoOutput]) {
     [iSession addOutput:iVideoOutput];
   }
  
   //初始化预览图层
   iPreviewLayer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:iSession];
   [iPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
   iPreviewLayer.frame = CGRectMake(0, 60, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-160);
   [self.iCameraView.layer addSublayer:iPreviewLayer];
  
   [iSession startRunning];
  
  
}

点击按钮拍照:

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//拍照
-( void )takePictures{
   AVCaptureConnection *connection = [iStillImageOutput connectionWithMediaType:AVMediaTypeVideo];
   if (!connection) {
     NSLog(@ "失败" );
     return ;
   }
   //设置焦距
   [connection setVideoScaleAndCropFactor:1];
  
   [iStillImageOutput captureStillImageAsynchronouslyFromConnection:connection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
     if (imageDataSampleBuffer==NULL) {
       NSLog(@ "NUll" );
       return ;
     }
    
     NSData *data = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
     UIImage *image = [UIImage imageWithData:data];
    
    
   }];
}

image即为拍照所得图片:

设置session的AVCaptureSessionPreset属性 。

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-(NSString *)getSessionPresetForDevice:(AVCaptureDevice *)device{
   if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset3840x2160]) {
     return AVCaptureSessionPreset3840x2160;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset1920x1080]){
     return AVCaptureSessionPreset1920x1080;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset1280x720]){
     return AVCaptureSessionPreset1280x720;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset640x480]){
     return AVCaptureSessionPreset640x480;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset352x288]){
     return AVCaptureSessionPreset352x288;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPresetHigh]){
     return AVCaptureSessionPresetHigh;
   } else if ([device supportsAVCaptureSessionPreset:AVCaptureSessionPresetMedium]){
     return AVCaptureSessionPresetMedium;
   } else {
     return AVCaptureSessionPresetLow;
   }
}

设置闪光灯:

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- (IBAction)iFlashBtn:(id)sender {
  
   [iDevice lockForConfiguration:nil];
   if (iDevice.flashMode == AVCaptureFlashModeOff) {
     if ([iDevice isFlashModeSupported:AVCaptureFlashModeOn]) {
       [iDevice setFlashMode:AVCaptureFlashModeOn];
      
       [self.iFlashBtn setBackgroundImage:[UIImage imageNamed:@ "flashBtn" ] forState:UIControlStateNormal];
     }
   } else if (iDevice.flashMode == AVCaptureFlashModeOn){
     if ([iDevice isFlashModeSupported:AVCaptureFlashModeOff]) {
       [iDevice setFlashMode:AVCaptureFlashModeOff];
      
        [self.iFlashBtn setBackgroundImage:[UIImage imageNamed:@ "flashOffBtn" ] forState:UIControlStateNormal];
     }
   }
   [iDevice unlockForConfiguration];
  
}

切换前置摄像头与后置摄像头:

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- (IBAction)iChangeBtn:(id)sender {
  
  
   NSArray *array = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
   AVCaptureDevice *newDevice = nil;
   AVCaptureDeviceInput *newDeviceInput = nil;
  
   CATransition *animation = [CATransition animation];
   animation.duration = 0.5f;
   animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
   animation.type = @ "oglFlip" ;
  
   if (iDevice.position == AVCaptureDevicePositionBack) {
     animation.subtype = kCATransitionFromLeft;
     for (AVCaptureDevice *device in array) {
       if (device.position == AVCaptureDevicePositionFront) {
         newDevice = device;
       }
     }
   } else if (iDevice.position == AVCaptureDevicePositionFront){
     animation.subtype = kCATransitionFromRight;
     for (AVCaptureDevice *device in array) {
       if (device.position == AVCaptureDevicePositionBack) {
         newDevice = device;
       }
     }
   }
  
   newDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:newDevice error:nil];
   [iPreviewLayer addAnimation:animation forKey:nil];
   if (newDeviceInput!=nil) {
     [iSession beginConfiguration];
     [iSession removeInput:iDeviceInput];
      iSession.sessionPreset = [self getSessionPresetForDevice:newDevice];
     if ([iSession canAddInput:newDeviceInput]) {
       [iSession addInput:newDeviceInput];
       iDeviceInput = newDeviceInput;
       iDevice = newDevice;
     } else {
       [iSession addInput:iDeviceInput];
     }
     [iSession commitConfiguration];
   }
  
  
}

点击屏幕对焦:

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//点击屏幕对焦
-( void )focusTap:(UIGestureRecognizer *)tap{
   CGPoint tapPoint = [tap locationInView:self.view];
  
  
   float Y = tapPoint.y;
   if (Y<60 || Y>([UIScreen mainScreen].bounds.size.height-100)) {
     return ;
   }
  
   [iDevice lockForConfiguration:nil];
   if ([iDevice isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
     [iDevice setFocusPointOfInterest:CGPointMake(tapPoint.x/self.view.frame.origin.x, tapPoint.y/self.view.frame.origin.y)];
     [iDevice setFocusMode:AVCaptureFocusModeAutoFocus];
   }
   [iDevice unlockForConfiguration];
  
   self.iFocusImgView.center = tapPoint;
   self.iFocusImgView.hidden = NO;
   [UIView animateWithDuration:0.3 animations:^{
     self.iFocusImgView.transform = CGAffineTransformMakeScale(1.25, 1.25);
   }completion:^( BOOL finished) {
     [UIView animateWithDuration:0.5 animations:^{
       self.iFocusImgView.transform = CGAffineTransformIdentity;
     } completion:^( BOOL finished) {
       self.iFocusImgView.hidden = YES;
     }];
   }];
}

关于视频录制可以在Demo中查看.

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我.

原文链接：https://blog.csdn.net/qq_38370919/article/details/73642494 。

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