iOS如何自定义相机实现拍照、录制视频
这篇文章主要介绍了iOS如何自定义相机实现拍照、录制视频，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
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具体内容如下
使用AVFoundation框架。
首先声明以下对象：
#import "CustomeCameraViewController.h"#import#import @interface CustomeCameraViewController () { // 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：
- (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：
//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
-(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：
- (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：
- (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：
//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; }]; }];}感谢你能够认真阅读完这篇文章，希望小编分享的“iOS如何自定义相机实现拍照、录制视频”这篇文章对大家有帮助，同时也希望大家多多支持创新互联，关注创新互联行业资讯频道，更多相关知识等着你来学习!
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