本文实例为大家分享了使用AVFoundation框架实现相机拍照、录制视频的具体代码，供大家参考，具体内容如下
这里是Demo
首先声明以下对象：
#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:
-(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 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];
}
