ios自定义照相机

由于项目里面需要对拍照后的图片进行编辑，当点击拍照后，拍照按钮变成编辑按钮，然后点击编辑，跳入图片编辑器。系统的照相机已经不再实用。因此只能使用自定义的照相机来实现其功能。
我使用的是AVFoundation这个框架来实现的。说明：图片编辑器使用的是AdobeCreativeSDKCore和AdobeCreativeSDKImage这两个第三方库，要使用此编辑功能的话需要去官网下载AdobeSDK。（下载地址百度一下就有）
具体代码如下：
YHCustomCameraControllerViewController.h文件

  #import <UIKit/UIKit.h>
  @class YHCustomCameraControllerViewController;
  @protocol YHCustomCameraControllerViewControllerDelegate<NSObject>
  -(void) YHCustomCameraController:(YHCustomCameraControllerViewController *) pick didFinishPickingMediaWithInfo:(UIImage *) cameraImage;

  -(void) YHCustomCameraControllerDidCancel:(YHCustomCameraControllerViewController *) pick;
  @end

 @interface YHCustomCameraControllerViewController : UIViewController
 @property (nonatomic,weak) id <YHCustomCameraControllerViewControllerDelegate> delegate;
 @end

YHCustomCameraControllerViewController.m文件

 #define KScreenWidth  [UIScreen mainScreen].bounds.size.width
 #define KScreenHeight  [UIScreen mainScreen].bounds.size.height
 #import "YHCustomCameraControllerViewController.h"
 #import <AVFoundation/AVFoundation.h>
 #import <Photos/Photos.h>
 #import <AdobeCreativeSDKCore/AdobeCreativeSDKCore.h>
 #import <AdobeCreativeSDKImage/AdobeCreativeSDKImage.h>

//以下三个静态字符串  是从Adobe获取的 相当于appkey 
static NSString * const kCreativeSDKClientId = @"379b94389361494ca14e16b10b16186f";
static NSString * const kCreativeSDKClientSecret = @"2fe9c466-84c5-4ebf-a134-49e54141f4f4";
 //   static NSString * const kCreativeSDKRedirectURLString = @"ams+2bad2e7649a1288e236fffeeabffa1945276f8aa://adobeid/379b94389361494ca14e16b10b16186f"";

 @interface YHCustomCameraControllerViewController ()<AdobeUXImageEditorViewControllerDelegate>{
AdobeUXImageEditorViewController *editorController;
}
 // 定义属性
@property (nonatomic,strong) AVCaptureDevice *device;  //设备
@property (nonatomic,strong) AVCaptureDeviceInput *input; // 输入
@property (nonatomic,strong) AVCaptureMetadataOutput *output; //输出
@property (nonatomic,strong) AVCaptureStillImageOutput *ImageOutPut;  // 图片输出
@property (nonatomic,strong) AVCaptureSession *session;  //会话
@property (nonatomic,strong) AVCaptureVideoPreviewLayer *previewLayer; // 预览

@property (nonatomic,strong) UIButton *photoButton;   //拍照按钮
@property (nonatomic,strong) UIButton *cancleButton; //取消按钮
@property (nonatomic,strong) UIButton *switchButton; //切换摄像头按钮
@property (nonatomic,strong) UIButton *edintButton;  //编辑按钮
@property (nonatomic,strong) UIView *focusView;    //聚焦View
@property (nonatomic,strong) UIImage *image;  //返回出去的图片
@property (nonatomic,strong) UIImageView *preImageView;
@end

@implementation YHCustomCameraControllerViewController
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = [UIColor clearColor];
     [self  initCustomCammra];
     [self  initSubViews];
    // 监听设备横屏
     [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(orientationDidChangeNotification:)
                                             name:UIDeviceOrientationDidChangeNotification
                                           object:nil];
   }

 #pragma mark - 横屏处理
 - (BOOL)shouldAutorotate{
  return NO;
 }
#pragma mark - 
- (AVCaptureVideoOrientation)avOrientationForDeviceOrientation:(UIDeviceOrientation)deviceOrientation
{
AVCaptureVideoOrientation result = (AVCaptureVideoOrientation)deviceOrientation;
if ( deviceOrientation == UIDeviceOrientationLandscapeLeft )
    result = AVCaptureVideoOrientationLandscapeRight;
else if ( deviceOrientation == UIDeviceOrientationLandscapeRight )
    result = AVCaptureVideoOrientationLandscapeLeft;
return result;
 }
  #pragma mark Notifications 当设备横屏时，修改预览图册frame
  - (void)orientationDidChangeNotification:(NSNotification *)nti{
if([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft){
    self.previewLayer.frame = CGRectMake(0, 0, KScreenWidth, KScreenHeight-42);
    
}else if([UIDevice currentDevice].orientation == UIDeviceOrientationPortrait){
    self.previewLayer.frame = CGRectMake(0, 42, KScreenWidth, KScreenHeight-100);
}

}

#pragma mark 初始化硬件设备
-(void) initCustomCammra{
  self.device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
 self.input = [[AVCaptureDeviceInput alloc]initWithDevice:self.device error:nil];
 self.output = [[AVCaptureMetadataOutput alloc]init];
 self.ImageOutPut = [[AVCaptureStillImageOutput alloc]init];
  self.session = [[AVCaptureSession alloc]init];
   if ([self.session canSetSessionPreset:AVCaptureSessionPreset3840x2160]) {
    [self.session setSessionPreset:AVCaptureSessionPreset3840x2160];
    }else{
    [self.session setSessionPreset:AVCaptureSessionPreset1280x720];
    }
 if ([self.session canAddInput:self.input]) {
    [self.session addInput:self.input];  
    }
 if ([self.session canAddOutput:self.ImageOutPut]) {
    [self.session addOutput:self.ImageOutPut];
   }
         //图像预览
    self.previewLayer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:self.session];
self.previewLayer.frame = CGRectMake(0, 42, KScreenWidth, KScreenHeight-42-120);
self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[self.view.layer addSublayer:self.previewLayer];
       //开始启动
     [self.session startRunning];
     //修改设备的属性，先加锁
if ([self.device lockForConfiguration:nil]) {
    //闪光灯自动
    if ([self.device isFlashModeSupported:AVCaptureFlashModeAuto]) {
        [self.device setFlashMode:AVCaptureFlashModeAuto];
    }
    //自动白平衡
    if ([self.device isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeAutoWhiteBalance]) {
        [self.device setWhiteBalanceMode:AVCaptureWhiteBalanceModeAutoWhiteBalance];
    }
    //解锁
    [self.device unlockForConfiguration];  
}
}

 #pragma mark 初始化界面的UI
- (void)initSubViews
 {
UIView *stateView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, KScreenWidth, 42)];
stateView.backgroundColor = [UIColor blackColor];
[self.view addSubview:stateView];

UIView *bgView = [[UIView alloc] initWithFrame:CGRectMake(0, KScreenHeight-120, KScreenWidth, 120)];
bgView.backgroundColor = [UIColor blackColor];
bgView.tag = 20181206;
[self.view addSubview:bgView];

self.cancleButton = [UIButton new];
[self.cancleButton setTitle:@"取消" forState:UIControlStateNormal];
self.cancleButton.titleLabel.textAlignment = NSTextAlignmentRight;
[self.cancleButton addTarget:self action:@selector(disMiss) forControlEvents:UIControlEventTouchUpInside];
[bgView addSubview:self.cancleButton];
[self.cancleButton mas_makeConstraints:^(MASConstraintMaker *make) {
    make.width.equalTo(@100);
    make.height.equalTo(@40);
    make.left.equalTo(bgView).offset(1);
    make.top.equalTo(bgView).offset(40);
}];

self.photoButton = [UIButton new];
[self.photoButton setImage:[UIImage imageNamed:@"photograph"] forState:UIControlStateNormal];
[self.photoButton addTarget:self action:@selector(shutterCamera) forControlEvents:UIControlEventTouchUpInside];
[bgView addSubview:self.photoButton];
[self.photoButton mas_makeConstraints:^(MASConstraintMaker *make) {
    make.width.equalTo(@60);
    make.height.equalTo(@60);
    make.centerX.equalTo(bgView.mas_centerX);
    make.top.equalTo(@30);
}];

self.edintButton = [UIButton new];
[self.edintButton setTitle:@"编辑" forState:UIControlStateNormal];
[self.edintButton addTarget:self action:@selector(edintingImage) forControlEvents:UIControlEventTouchUpInside];
self.edintButton.hidden = YES;
[bgView addSubview:self.edintButton];
[self.edintButton mas_makeConstraints:^(MASConstraintMaker *make) {
    make.width.equalTo(@40);
    make.height.equalTo(@40);
    make.centerX.equalTo(bgView.mas_centerX);
    make.top.equalTo(@40);
}];

self.focusView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 80, 80)];
self.focusView.layer.borderWidth = 1.0;
self.focusView.layer.borderColor = [UIColor orangeColor].CGColor;
[self.view addSubview:self.focusView];
self.focusView.hidden = YES;

self.switchButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.switchButton setTitle:@"切换" forState:UIControlStateNormal];
self.switchButton.titleLabel.textAlignment = NSTextAlignmentLeft;
[self.switchButton addTarget:self action:@selector(changeCamera)    forControlEvents:UIControlEventTouchUpInside];
[bgView addSubview:self.switchButton];
[self.switchButton mas_makeConstraints:^(MASConstraintMaker *make) {
    make.width.equalTo(@100);
    make.height.equalTo(@40);
    make.right.equalTo(bgView).offset(1);
    make.top.equalTo(bgView).offset(40);
}];

UIView *clearView = [[UIView alloc] initWithFrame:self.previewLayer.frame];
clearView.backgroundColor = [UIColor clearColor];
[self.view addSubview:clearView];

// 聚焦的手势
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(focusGesture:)];
[clearView addGestureRecognizer:tapGesture]; 
}

#pragma mark- 切换摄像头  使用照片
- (void)changeCamera{
//切换摄像头和使用照片为同一个按钮，当点击拍照后，按钮title变为使用照片
if ([self.switchButton.currentTitle isEqualToString:@"切换"]) {
    //获取摄像头的数量
    NSUInteger cameraCount = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] count];
    //摄像头小于等于1的时候直接返回
    if (cameraCount <= 1) return;
    
    AVCaptureDevice *newCamera = nil;
    AVCaptureDeviceInput *newInput = nil;
    //获取当前相机的方向(前还是后)
    AVCaptureDevicePosition position = [[self.input device] position];
    
    //为摄像头的转换加转场动画
    CATransition *animation = [CATransition animation];
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    animation.duration = 0.5;
    animation.type = @"oglFlip";
    
    if (position == AVCaptureDevicePositionFront) {
        //获取后置摄像头
        newCamera = [self cameraWithPosition:AVCaptureDevicePositionBack];
        animation.subtype = kCATransitionFromLeft;
    }else{
        //获取前置摄像头
        newCamera = [self cameraWithPosition:AVCaptureDevicePositionFront];
        animation.subtype = kCATransitionFromRight;
    }
    [self.previewLayer addAnimation:animation forKey:nil];
    //输入流
    newInput = [AVCaptureDeviceInput deviceInputWithDevice:newCamera error:nil];
    if (newInput != nil) {
        [self.session beginConfiguration];
        //先移除原来的input
        [self.session removeInput:self.input];
        if ([self.session canAddInput:newInput]) {
            [self.session addInput:newInput];
            self.input = newInput;
        } else {
            //如果不能加现在的input，就加原来的input
            [self.session addInput:self.input];
        }
        [self.session commitConfiguration];
    }
}else if ([self.switchButton.currentTitle isEqualToString:@"使用照片"]){
    //代理方法  将图片传给外部
    if ([self.delegate respondsToSelector:@selector(YHCustomCameraController:didFinishPickingMediaWithInfo:)]) {
        [self.delegate YHCustomCameraController:self didFinishPickingMediaWithInfo:self.image];
        [self  dismissViewControllerAnimated:YES completion:nil];
    }
    [self.preImageView  removeFromSuperview];
}
 }

 #pragma mark - 切换摄像头  系统方法
- (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition)position{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for ( AVCaptureDevice *device in devices ){
    if ( device.position == position ) {
        return device;
    }
}
return nil;
}


 #pragma mark- 拍照
- (void)shutterCamera
{
AVCaptureConnection * videoConnection = [self.ImageOutPut connectionWithMediaType:AVMediaTypeVideo];
if (videoConnection ==  nil) {
    return;
}

UIDeviceOrientation curDeviceOrientation = [[UIDevice currentDevice] orientation];
AVCaptureVideoOrientation avcaptureOrientation = [self avOrientationForDeviceOrientation:curDeviceOrientation];
[videoConnection setVideoOrientation:avcaptureOrientation];
if (curDeviceOrientation == UIDeviceOrientationLandscapeLeft || curDeviceOrientation == UIDeviceOrientationLandscapeRight) {
    [self horizontalScreenShoot:videoConnection];
}else{
    [self.ImageOutPut captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
        
        if (imageDataSampleBuffer == nil) {
            return;
        }
        [self.cancleButton setTitle:@"重拍" forState:UIControlStateNormal];
        [self.switchButton setTitle:@"使用照片" forState:UIControlStateNormal];
        self.photoButton.hidden = YES;
        self.edintButton.hidden = NO;
        NSData *imageData =  [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
        self.image = [UIImage imageWithData:imageData];
        [self.session stopRunning];
        self.previewLayer.hidden = YES;
        self.preImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 42, KScreenWidth, KScreenHeight-120-42)];
        self.preImageView.layer.masksToBounds = YES;
        self.preImageView.image = [self imageCompressForSize:self.image targetSize:self.preImageView.frame.size];
        [self.view addSubview:self.preImageView];
    }];
 } 
  }
 #pragma mark- 横屏模式
  -(void)horizontalScreenShoot:(AVCaptureConnection *)videoConnection{
self.view.backgroundColor = [UIColor blackColor];
UIView *view = (UIView*)[self.view viewWithTag:20181206];
view.frame = CGRectMake(0, KScreenHeight-140, KScreenWidth, 120);
[self.ImageOutPut captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
    
    if (imageDataSampleBuffer == nil) {
        return;
    }
    [self.cancleButton setTitle:@"重拍" forState:UIControlStateNormal];
    [self.switchButton setTitle:@"使用照片" forState:UIControlStateNormal];
    self.photoButton.hidden = YES;
    self.edintButton.hidden = NO;
    NSData *imageData =  [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
    self.image = [UIImage imageWithData:imageData];
    [self.session stopRunning];
    self.previewLayer.hidden = YES;
    self.preImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, (KScreenHeight-KScreenWidth)/2, KScreenWidth, KScreenWidth*2/3)];
    self.preImageView.layer.masksToBounds = YES;
    self.preImageView.image = self->_image;
    [self.view addSubview:self.preImageView];
}];

}

 #pragma mark- 取消
 - (void)disMiss
{
//判断取消按钮的状态
if ([self.cancleButton.currentTitle isEqualToString:@"取消"]) {
     [self.preImageView removeFromSuperview];
     [self dismissViewControllerAnimated:YES completion:nil];
    if ([self.delegate respondsToSelector:@selector(YHCustomCameraControllerDidCancel:)]) {
        [self.delegate YHCustomCameraControllerDidCancel:self];
    }
}else if ([self.cancleButton.currentTitle isEqualToString:@"重拍"]){
   [self.cancleButton setTitle:@"取消" forState:UIControlStateNormal];
   [self.switchButton setTitle:@"切换" forState:UIControlStateNormal];
    self.photoButton.hidden = NO;
    self.edintButton.hidden = YES;
    self.previewLayer.hidden = NO;
   [self.preImageView removeFromSuperview];
   [self.session startRunning];
}
 }

#pragma mark- 编辑    编辑图片采用的是第三方的Adobe图片编辑器
-(void)edintingImage{
if ([UIDevice currentDevice].systemVersion.floatValue < 9.0) {
    [self.view makeToast:NSLocalizedString(@"QBAssetCollectionVC_TostTitle_simple", @"您的系统版本太低，不支持改功能！")];
    return;
      }

//push 编辑控制器
[[AdobeUXAuthManager sharedManager]setAuthenticationParametersWithClientID:kCreativeSDKClientId clientSecret:kCreativeSDKClientSecret additionalScopeList:@[AdobeAuthManagerUserProfileScope,AdobeAuthManagerEmailScope,AdobeAuthManagerAddressScope]];
[AdobeUXAuthManager sharedManager].redirectURL = [NSURL URLWithString:kCreativeSDKRedirectURLString];
self->editorController = [[AdobeUXImageEditorViewController alloc] initWithImage:self.image];
[self->editorController setDelegate:self];
self->editorController.navigationController.navigationBar.translucent = NO;
[self presentViewController:self->editorController animated:NO completion:^{
  
}];
}

#pragma mark - AdobeUXImageEditorViewControllerDelegate
-(void)photoEditorCanceled:(AdobeUXImageEditorViewController *)editor{
//横屏状态下编辑强制转化成竖屏
if([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft || [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight){
    [self interfaceOrientation:UIInterfaceOrientationPortrait];
}
[editor dismissViewControllerAnimated:NO completion:^{
    
}];

}
-(void)photoEditor:(AdobeUXImageEditorViewController *)editor finishedWithImage:(UIImage *)image{

//横屏状态下编辑强制转化成竖屏
if([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft || [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight){
    [self interfaceOrientation:UIInterfaceOrientationPortrait];
}
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0*NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
    self.image = image;
    [self.preImageView setImage:self.image];
    [editor dismissViewControllerAnimated:NO completion:^{

    }];
});
 }

#pragma mark- 聚焦
- (void)focusGesture:(UITapGestureRecognizer*)gesture{
CGPoint point = [gesture locationInView:gesture.view];
[self focusAtPoint:point];
}
 - (void)focusAtPoint:(CGPoint)point{
CGSize size = self.previewLayer.frame.size;
CGPoint focusPoint = CGPointMake( point.y /size.height ,1 - point.x/size.width );

if ([self.device lockForConfiguration:nil]) {
    
    if ([self.device isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
        [self.device setFocusPointOfInterest:focusPoint];
        [self.device setFocusMode:AVCaptureFocusModeAutoFocus];
    }
    
    if ([self.device isExposureModeSupported:AVCaptureExposureModeAutoExpose ]) {
        [self.device setExposurePointOfInterest:focusPoint];
        //曝光量调节
        [self.device setExposureMode:AVCaptureExposureModeAutoExpose];
    }
    
    [self.device unlockForConfiguration];
    _focusView.center = point;
    _focusView.hidden = NO;
    [UIView animateWithDuration:0.3 animations:^{
        self->_focusView.transform = CGAffineTransformMakeScale(1.25, 1.25);
    }completion:^(BOOL finished) {
        [UIView animateWithDuration:0.5 animations:^{
            self->_focusView.transform = CGAffineTransformIdentity;
        } completion:^(BOOL finished) {
            self->_focusView.hidden = YES;
        }];
    }];
}

}

 #pragma mark 强制转屏
  - (void)interfaceOrientation:(UIInterfaceOrientation)orientation
{
if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
    SEL selector  = NSSelectorFromString(@"setOrientation:");
    NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
    [invocation setSelector:selector];
    [invocation setTarget:[UIDevice currentDevice]];
    int val = orientation;
    // 从2开始是因为0 1 两个参数已经被selector和target占用
    [invocation setArgument:&val atIndex:2];
    [invocation invoke];
}
}

 #pragma mark - 等比例缩放图片
 -(UIImage *) imageCompressForSize:(UIImage *)sourceImage targetSize:(CGSize)size{
UIImage *newImage = nil;
CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat targetWidth = size.width;
CGFloat targetHeight = size.height;
CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;
CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);

if(CGSizeEqualToSize(imageSize, size) == NO){
    CGFloat widthFactor = targetWidth / width;
    CGFloat heightFactor = targetHeight / height;
    
    if(widthFactor > heightFactor){
        scaleFactor = widthFactor;
    }else{
        scaleFactor = heightFactor;
    }
    scaledWidth = width * scaleFactor;
    scaledHeight = height * scaleFactor;
    
    if(widthFactor > heightFactor){
        thumbnailPoint.y = (targetHeight - scaledHeight) *0.5;
    }else if(widthFactor < heightFactor){
        thumbnailPoint.x = (targetWidth - scaledWidth) *0.5;
    }
}

UIGraphicsBeginImageContext(size);
CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width = scaledWidth;
thumbnailRect.size.height = scaledHeight;
[sourceImage drawInRect:thumbnailRect];
newImage = UIGraphicsGetImageFromCurrentImageContext();

if(newImage == nil){
    NSLog(@"scale image fail");
}
UIGraphicsEndImageContext();
return newImage;
}

 -(void) dealloc{

[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
 }

外部调用方法很简单

   YHCustomCameraControllerViewController *cemeraVC = [[YHCustomCameraControllerViewController alloc] init];
    cemeraVC.delegate = self;
    //判断是否有相机权限
    [CommonUserPermission getCameraPermissionWith:self completionBlock:^{
    [self presentViewController:cemeraVC animated:YES completion:nil];
    }];

 #pragma mark - YHCustomCameraControllerViewController代理方法 拍照完毕后回调
 -(void)YHCustomCameraController:(YHCustomCameraControllerViewController *)pick didFinishPickingMediaWithInfo:(UIImage *)cameraImage{
 //将拍照后的图片发送出去
     [self sendImage:image];

  }

-(void)YHCustomCameraControllerDidCancel:(YHCustomCameraControllerViewController *)pick{
if ([pick isKindOfClass:[YHCustomCameraControllerViewController class]]) {
    [pick dismissViewControllerAnimated:YES completion:nil];
}
}

效果图如下：

编辑后的图片IMG_0205.JPG 竖屏拍摄IMG_0274.PNG 横屏拍摄IMG_0276.PNG 点击拍照后IMG_0277.PNG