Question

我对这种编码非常新颖但是已经学到了很多东西，并且不幸地在我正在开发的应用程序中遇到了麻烦。

我正在尝试创建一个相机应用程序，允许用户拍摄“之前”图像，然后拍摄“之后”图像，然后我会想要将图像放在一起的选项（左右）并保存为一个图像。

到目前为止，我已设法对应用进行编码以使用以下代码拍摄单张照片：

HEADER：

#import <UIKit/UIKit.h> 

@interface ViewController : UIViewController <UIImagePickerControllerDelegate,         UINavigationControllerDelegate>

@property (strong, nonatomic) IBOutlet UIImageView *beforeImage;

- (IBAction)cameraBeforeImage:(UIButton *)sender;

- (IBAction)libraryBeforeImage:(UIButton *)sender;

- (IBAction)deleteBeforeImage:(UIButton *)sender;

@property (strong, nonatomic) IBOutlet UIImageView *afterImage;

- (IBAction)cameraAfterImage:(UIButton *)sender;

- (IBAction)libraryAfterImage:(UIButton *)sender;

- (IBAction)deleteAfterImage:(UIButton *)sender;

- (IBAction)saveImages:(UIButton *)sender;
@end

实现：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
 {
[super viewDidLoad];
 }

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (IBAction)cameraBeforeImage:(UIButton *)sender {

if (![UIImagePickerController     isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

    UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Oops!"
                                                          message:@"This Device Has No  Camera, Please Select An Image From Your Library."
                                                         delegate:nil
                                                cancelButtonTitle:@"OK"
                                                otherButtonTitles: nil];

    [myAlertView show];

}else{

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:picker animated:YES completion:NULL];
}

}

- (IBAction)libraryBeforeImage:(UIButton *)sender {

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

[self presentViewController:picker animated:YES completion:NULL];
}

- (IBAction)deleteAfterImage:(UIButton *)sender {
}

- (IBAction)saveImages:(UIButton *)sender {
}

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

UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.beforeImage.image = chosenImage;

[picker dismissViewControllerAnimated:YES completion:NULL];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];

}

- (IBAction)deleteBeforeImage:(UIButton *)sender {
}
- (IBAction)cameraAfterImage:(UIButton *)sender {
}

- (IBAction)libraryAfterImage:(UIButton *)sender {
}

- (IBAction)saveImages:(UIButton *)sender {
}


@end

以下是我需要添加的内容列表，非常感谢任何帮助！

将相同的功能添加到'之前'按钮作为'之前'，但将图像存储在'afterImage'图像视图中。
为'saveImages'按钮添加功能，将两张拍摄的图像保存为一个拼接在一起的图像。

提前谢谢大家！

Answer 1

1。第一个问题，我想你的问题是'你怎么知道拍摄了哪张照片以及在哪里拍照'？

答案1：创建两个UIImagePickerControllers作为属性。一旦imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info返回图像，您只需检查哪个控制器是if( picker == afterPictureController){...。

答案2：创建一个标志，指示下一张拍摄的照片是后照片还是前照片。它不是很灵活，但它有效。

2。要缝合两个图像，您可以创建大小为UIGraphicsBeginImageContext（image1Width + image2Width，MAX（image1Height，image2Height））并使用上下文绘制图像。之后，您可以通过调用UIGraphicsGetImageFromCurrentImageContext();

从上下文中获取拼接图像

在Camera App中拍摄两张图像

1 个答案: