iOS－－相机（自定义相机） 保存照片到相册

自定义相机  提供两个链接：

http://course.gdou.com/blog/Blog.pzs/archive/2011/12/14/10882.html （原理讲解）

http://www.cnblogs.com/liangzhimy/archive/2012/10/26/2740905.html

保存相片到相册

        

UIImageWriteToSavedPhotosAlbum(image,self,@selector(image:didFinishSavingWithError:contextInfo:),nil);

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo

{

   NSString *alertMessage;

    

   if(!error)

    {

        alertMessage =@"图片保存成功";

    }

   else

    {

        alertMessage =@"图片保存失败";

    }

    

    UIAlertView *alert = [[UIAlertViewalloc] initWithTitle:nil

                                                   message:alertMessage

                                                  delegate:self

                                         cancelButtonTitle:@"好"

                                         otherButtonTitles:nil];

    [alertshow];

}

iOS中使用相机，有两种方式：1:使用ios系统自带的相机。（ UIImagePickerController）

 2:自定义相机。（利用AVFoundation.framework框架，自定义照相）

第一种：使用iOS系统自带相机。

    1:实现 <UINavigationControllerDelegate,UIImagePickerControllerDelegate>这两个协议

      2:创建UIImagePickerController实例。（以下是使用相机照相，如果只是想访问系统相册，则可以直接设置代理后，跳转到vc就行，

#pragma mark --从相册中选取图片，然后使用滤镜

- (IBAction)chosePicAndChange:(id)sender

{

 

    if (!self.ipc.delegate) {

        self.ipc.delegate=self;

    }

    [self presentViewController:self.ipc animated:YES completion:nil];

    

}

）

-(UIImagePickerController *)ipc

{

   if (!_ipc) {

        _ipc=[UIImagePickerControllernew];

   }

   return_ipc;

}

 //判断是否可以打开相机，模拟器此功能无法使用

    if([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])

    {

       self.ipc.delegate=self;

       //是否可编辑

        self.ipc.allowsEditing=YES;

        

       //摄像头

        self.ipc.sourceType=UIImagePickerControllerSourceTypeCamera;

        [selfpresentViewController:self.ipcanimated:YEScompletion:nil];

        

    }else

    {

        UIAlertView *alert = [[UIAlertViewalloc]initWithTitle:@"Error"message:@"你没有摄像头"delegate:nilcancelButtonTitle:@"Drat!"otherButtonTitles:nil];

        [alertshow];

        

    }

3:实现UIImagePickerControllerDelegate （保存拍摄的照片）

//拍摄完成后，要执行的方法

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

    //得到图片

    UIImage *image=[infoobjectForKey:UIImagePickerControllerOriginalImage];

   

    /**

     用于拍照时，图片存入相册

     */

#if 0

    //图片存入相册

    UIImageWriteToSavedPhotosAlbum(image, nil,nil,nil);

#endif 

   

    /**

        单利传值，弹出下一个viewcontroller

     */

    AZChoseImage *choseImage=[AZChoseImagedefaultChoseImage];

    choseImage.image=image;

    [selfdismissViewControllerAnimated:NOcompletion:nil];

    

    [self.navigationControllerpushViewController:self.filterVCanimated:YES];

    

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    

    [selfdismissViewControllerAnimated:YEScompletion:nil];

}

完整的代码：

#import "ViewController.h"#import "CustomViewController.h"#import "AZFliterViewController.h"#import "AZChoseImage.h"@interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>@property (nonatomic,strong)UIImagePickerController *ipc;@property (nonatomic,strong)CustomViewController *customIpc;@property (nonatomic,strong)AZFliterViewController *filterVC;@end@implementation ViewController#pragma mark -- 懶加载-(UIImagePickerController *)ipc{    if (!_ipc) {        _ipc=[UIImagePickerController new];    }    return _ipc;}-(CustomViewController *)customIpc{    if (!_customIpc) {        _customIpc=[[CustomViewController alloc] init];    }    return _customIpc;}-(AZFliterViewController *)filterVC{    if(!_filterVC)    {        _filterVC=[[AZFliterViewController alloc] init];    }    return _filterVC;}- (void)viewDidLoad {    [super viewDidLoad];               }- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark -- 使用UIImagePickerController- (IBAction)takePhoto:(id)sender{    //判断是否可以打开相机，模拟器此功能无法使用    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])    {        self.ipc.delegate=self;        //是否可编辑        self.ipc.allowsEditing=YES;                //摄像头        self.ipc.sourceType=UIImagePickerControllerSourceTypeCamera;        [self presentViewController:self.ipc animated:YES completion:nil];            }else    {        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"你没有摄像头" delegate:nil cancelButtonTitle:@"Drat!" otherButtonTitles:nil];        [alert show];            }}#pragma mark -- UIImagePickerControllerDelegate//拍摄完成后，要执行的方法- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    //得到图片    UIImage *image=[info objectForKey:UIImagePickerControllerOriginalImage];       /**     用于拍照时，图片存入相册     */#if 0    //图片存入相册    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);#endif        /**        单利传值，弹出下一个viewcontroller     */    AZChoseImage *choseImage=[AZChoseImage defaultChoseImage];    choseImage.image=image;    [self dismissViewControllerAnimated:NO completion:nil];        [self.navigationController pushViewController:self.filterVC animated:YES];    }- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{        [self dismissViewControllerAnimated:YES completion:nil];}#pragma mark -- 使用AVFoundation.framework框架自定义照相- (IBAction)customTakePhoto:(id)sender{    [self.navigationController pushViewController:self.customIpc animated:YES];}#pragma mark -- 从相册中选取图片，然后使用滤镜- (IBAction)chosePicAndChange:(id)sender{     if (!self.ipc.delegate) {        self.ipc.delegate=self;    }    [self presentViewController:self.ipc animated:YES completion:nil];    }@end

第二种：利用AVFoundation.framework框架，自定义照相

完整代码：

#import "CustomViewController.h"#import <AVFoundation/AVFoundation.h>/** 需要导入头文件：#import <AVFoundation/AVFoundation.h> */@interface CustomViewController ()/** 在AVFoundation框架下使用自定义照相需要的属性 *///AVCaptureSession对象来执行输入设备和输出设备之间的数据传递@property (nonatomic, strong)       AVCaptureSession  * session;//AVCaptureDeviceInput对象是输入流@property (nonatomic, strong)       AVCaptureDeviceInput   * videoInput;//照片输出流对象@property (nonatomic, strong)       AVCaptureStillImageOutput   * stillImageOutput;//预览图层，来显示照相机拍摄到的画面@property (nonatomic, strong)       AVCaptureVideoPreviewLayer  * previewLayer;#pragma mark -- 定义相机的展示//切换前后镜头的按钮@property (nonatomic, strong)       UIBarButtonItem  * changeButton;//拍照按钮@property (nonatomic, strong)       UIButton   * takePhotoButton;//放置预览图层的View@property (nonatomic, strong)       UIView    * cameraShowView;@end@implementation CustomViewController- (void)viewDidLoad {    [super viewDidLoad];        //初始化自定义相机的各实例    [self initialSession];        [self createCustomCaramView];        self.view.backgroundColor=[UIColor whiteColor];        }- (void) viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];    if (self.session)    {        [self.session startRunning];    }    [self createCameraLayer];}- (void) viewDidDisappear:(BOOL)animated{    [super viewDidDisappear: animated];    if (self.session) {        [self.session stopRunning];    }}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark -- 自定义照相/** 初始化自定义照相的相关实例 */- (void) initialSession{        //01 创建session    self.session = [[AVCaptureSession alloc] init];        // 设置采集质量    if([self.session canSetSessionPreset:AVCaptureSessionPresetPhoto])    {        self.session.sessionPreset=AVCaptureSessionPresetPhoto;    }            //02 创建输入设备，[self fronCamera]方法会返回一个AVCaptureDevice对象，因为我初始化时是采用前摄像头，    self.videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontCamera] error:nil];        //03 创建输出设备    /**          有四类输出设备：          1: AVCaptureMovieFileOutput to output to a movie file (输出一个 视频文件)          2: AVCaptureVideoDataOutput if you want to process frames from the video being captured (可以采集数据从指定的视频中)          3: AVCaptureAudioDataOutput if you want to process the audio data being captured (采集音频)          4: AVCaptureStillImageOutput if you want to capture still images with accompanying metadata (采集静态图片)          */        self.stillImageOutput = [[AVCaptureStillImageOutput alloc] init];        // 这是输出流的设置参数AVVideoCodecJPEG参数表示以JPEG的图片格式输出图片    NSDictionary * outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG,AVVideoCodecKey, nil];        [self.stillImageOutput setOutputSettings:outputSettings];            //04 添加输入输出设备到session中    if ([self.session canAddInput:self.videoInput]) {        [self.session addInput:self.videoInput];    }    if ([self.session canAddOutput:self.stillImageOutput]) {        [self.session addOutput:self.stillImageOutput];    }       }#pragma mark -- 获取设备（前 后 摄像头）- (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition) position {    NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];    for (AVCaptureDevice *device in devices) {        if ([device position] == position) {            return device;        }    }    return nil;}- (AVCaptureDevice *)frontCamera {    return [self cameraWithPosition:AVCaptureDevicePositionFront];}- (AVCaptureDevice *)backCamera {    return [self cameraWithPosition:AVCaptureDevicePositionBack];}#pragma mark -- 创建自定义照相上的按键以及view-(void)createCustomCaramView{    _changeButton =[[UIBarButtonItem alloc] initWithTitle:@"调换摄像头" style:UIBarButtonItemStylePlain target:self action:@selector(toggleCamera)];    self.navigationItem.rightBarButtonItem=_changeButton;            _takePhotoButton=[UIButton buttonWithType:UIButtonTypeSystem];    [_takePhotoButton setTitle:@"点击拍照" forState:UIControlStateNormal];    _takePhotoButton.frame=CGRectMake(0, 400, self.view.bounds.size.width,50);    [_takePhotoButton addTarget:self action:@selector(shutterCamera) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:_takePhotoButton];            _cameraShowView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 400)];        _cameraShowView.backgroundColor=[UIColor grayColor];    [self.view addSubview:_cameraShowView];    }#pragma mark -- 切换镜头的按键方法- (void)toggleCamera {    NSUInteger cameraCount = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] count];    if (cameraCount > 1) {        NSError *error;        AVCaptureDeviceInput *newVideoInput;        AVCaptureDevicePosition position = [[_videoInput device] position];                if (position == AVCaptureDevicePositionBack)            newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontCamera] error:&error];        else if (position == AVCaptureDevicePositionFront)            newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backCamera] error:&error];        else            return;                if (newVideoInput != nil) {            [self.session beginConfiguration];            [self.session removeInput:self.videoInput];            if ([self.session canAddInput:newVideoInput]) {                [self.session addInput:newVideoInput];                [self setVideoInput:newVideoInput];            } else {                [self.session addInput:self.videoInput];            }            [self.session commitConfiguration];        } else if (error) {            NSLog(@"toggle carema failed, error = %@", error);        }    }}#pragma mark -- 拍照按键响应事件- (void) shutterCamera{    AVCaptureConnection * videoConnection = [self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo];    if (!videoConnection) {        NSLog(@"take photo failed!");        return;    }        [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {        if (imageDataSampleBuffer == NULL) {            return;        }        NSData * imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];        UIImage * image = [UIImage imageWithData:imageData];                NSLog(@"image size = %@",NSStringFromCGSize(image.size));    }];}#pragma mark -- 创建显示层- (void) createCameraLayer{    //如果不允许相机拍照，则返回//    if (_cameraAvaible == NO) return;        if (self.previewLayer == nil) {        self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];        UIView * view = self.cameraShowView;        CALayer * viewLayer = [view layer];        [viewLayer setMasksToBounds:YES];                CGRect bounds = [view bounds];        [self.previewLayer setFrame:bounds];        [self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspect];                [viewLayer insertSublayer:self.previewLayer below:[[viewLayer sublayers] objectAtIndex:0]];    }}@end