IOS开发 照相机小结一

本文小白 仅供提醒.

IOS照相机的使用

  情况 程序中使用照相机.

 应用:拍摄图片 保存 并且可以切割图片

 类 : JBCroppableView 第三方

  包:  MobileCoreServices

          

#import "JBCroppableView.h"

#import <MobileCoreServices/UTCoreTypes.h>

@property (nonatomic, strong) UIImageView *image;

@property (nonatomic, strong) JBCroppableView *pointsView;

@property (nonatomic, strong) UIImage *storeImage;

    使用:

// 显示

    // 使用照相机的图片在试图中

    _image = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 440)];

    _image.userInteractionEnabled = YES;

    [self.view addSubview:_image];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];

    [_image addGestureRecognizer:tap];

// 打开相机

    UIButton *came = [UIButton buttonWithType:UIButtonTypeCustom];

    came.frame = CGRectMake(80, 440, 80, 40);

    [came setTitle:@"打开" forState:UIControlStateNormal];

    came.backgroundColor = [UIColor cyanColor];

    [came addTarget:self action:@selector(cameOpen:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:came];

// 图像纠偏

    UIButton *tip = [UIButton buttonWithType:UIButtonTypeCustom];

    tip.frame = CGRectMake(160, 440, 80, 40);

    [tip setTitle:@"图像纠偏" forState:UIControlStateNormal];

    tip.backgroundColor = [UIColor cyanColor];

    [tip addTarget:self action:@selector(tip:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:tip];

    

    // 存储

    UIButton *cameStore = [UIButton buttonWithType:UIButtonTypeCustom];

    cameStore.frame = CGRectMake(240, 440, 80, 40);

    [cameStore setTitle:@"Store" forState:UIControlStateNormal];

    cameStore.backgroundColor = [UIColor cyanColor];

    [cameStore addTarget:self action:@selector(storeImage:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:cameStore];

// 可以循环创建UIButton

   使用 系统自带的UIImagePickerController

- (void)cameOpen:(UIButton *)button

{

    // 创建图片选择器

    UIImagePickerController * picker = [[UIImagePickerController alloc]init];

    //判断是否可以打开相机

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        //摄像头 指定源的类型

        picker.sourceType = UIImagePickerControllerSourceTypeCamera;

        

        picker.delegate = self;

        picker.allowsEditing = YES;  //是否可编辑

        

        // 推出

        [self presentViewController:picker animated:YES completion:nil];

    }else{

        //如果没有提示用户

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"你没有摄像头" delegate:nil cancelButtonTitle:@"NO" otherButtonTitles:nil];

        [alert show];

    }

}

//用户点击图像选取器中的“cancel”按钮时被调用，这说明用户想要中止选取图像的操作

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    [picker dismissViewControllerAnimated:YES completion:nil];

    

}

//用户点击选取器中的“choose”按钮时被调用，告知委托对象，选取操作已经完成，同时将返回选取图片的实例

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo

{

    // 显示图片  图片显示在视图中

    [_image setImage:image];

    // 使用第三方类 创建剪切点

    self.pointsView = [[JBCroppableView alloc] initWithImageView:self.image];

    [self.pointsView addPoints:8];

   

    [picker dismissModalViewControllerAnimated:YES];

}

// 截取图片的形状

- (void)tip:(UIButton *)tipButton

{

    // 截取的UIImageView大小

    self.image.frame = [JBCroppableView scaleRespectAspectFromRect1:CGRectMake(0, 0, self.image.frame.size.width, self.image.frame.size.height) toRect2:self.image.frame];

    

    

     [self.view addSubview:self.pointsView];

    

    self.image.image = [self.pointsView deleteBackgroundOfImage:self.image];

 

}

// 存贮图片到相册

- (void)storeImage:(UIButton *)button

{

    

    UIImageWriteToSavedPhotosAlbum(self.storeImage, nil, nil,nil);

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"存储照片成功"

                                                    message:@"您已将照片存储于图片库中，打开照片程序即可查看。"

                                                   delegate:self

                                          cancelButtonTitle:@"OK"

                                          otherButtonTitles:nil];

    [alert show];

    

}