如何将从 UIImagePickerController 挑选的两个图像传递给另一个 ViewController

Posted 2023-03-07

【中文标题】如何将从 UIImagePickerController 挑选的两个图像传递给另一个 ViewController

【英文标题】：How to pass two images picked from UIImagePickerController to another ViewController

【发布时间】：2013-11-13 06:31:38

【问题描述】：

我在一个视图控制器中有两张图片，它们是用UIImagePickerController 挑选的：

ChoosePhotosViewController.h

@interface PickPhotosViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (strong, nonatomic) IBOutlet UIImageView *pickedImage1; // image 1
@property (strong, nonatomic) IBOutlet UIImag8eView *pickedImage2; // image 2

- (IBAction)pickImage1:(id)sender; // button that picks up the first image
- (IBAction)pickImage2:(id)sender; // button that picks up the seconds image
- (IBAction)nextButton:(id)sender;

在实现文件中 - ChoosePhotosViewController.m

@implementation PickPhotosViewController
@synthesize pickedImage1, pickedImage2;

我为每个按钮编写了一个代码，该代码通过一系列操作调用操作表：

-(IBAction)pickImage1:(id)sender 
[[NSUserDefaults standardUserDefaults] setInteger:CurrentImageCategoryImage1 forKey:@"currentImageCategory"];
[[NSUserDefaults standardUserDefaults] synchronize];

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose image one" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Choose existing photo", @"Take new photo", nil];
[actionSheet showInView:self.view];

有两个动作 - 从相机空中拍摄照片从库上传：

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex 
if (buttonIndex == 0) 
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:picker animated:YES completion:NULL];
    
else if (buttonIndex == 1) 
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    [self presentViewController:picker animated:YES completion:NULL];
    

第二个按钮的算法类似。然后在我写的UIImagePickerController方法中；

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

UIImage *chosenImage = info[UIImagePickerControllerEditedImage];    

if([[NSUserDefaults standardUserDefaults] integerForKey:@"currentImageCategory"] ==CurrentImageCategoryImage1)
    
    self.pickedImage1.image = chosenImage;
    
else if([[NSUserDefaults standardUserDefaults] integerForKey:@"currentImageCategory"] ==CurrentImageCategoryImage2)
    
    self.pickedImage2.image = chosenImage;
    

然后，当我单击“下一步”按钮时，我需要在下一个 viewController 中显示这两个图像。我使用故事板，这就是我写prepareForSegue 方法的原因：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 

if ([segue.identifier isEqualToString:@“next"]) 
    TypeTextViewController *transferedImage = [segue destinationViewController];
    transferedImage.imageWithText1 = pickedImage1;
       

其中imageWithText1 是UIImageView 并在TypeTextViewController.h 中声明，但是当我单击按钮时，图像不会出现在TypeTextViewController 中。

哪里出了问题？

【问题讨论】：

你的引号不正确，把@"next"。你检查是否阻止工作？

在代码中标记是好的，也许当我在 *** 上输入时我做错了。代码正在运行

【参考方案1】：

你想创建NSMutableArray，然后将这两个Images添加到这个数组中。然后你必须把这个NSMutableArray传递给另一个视图控制器。

希望这会有所帮助。

【参考方案2】：

我认为您不能将 UIImageView 从一个 VC 传递给另一个 VC。我认为我们只能传递 UIImage 而不能传递 UIImageView。试试这个。。但我不确定。

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 

  if ([segue.identifier isEqualToString:@“next"]) 
  
  TypeTextViewController *transferedImage = [segue destinationViewController];
  transferedImage.imageWithText1.image = pickedImage1.image;
     

【讨论】：

它不起作用。这是否意味着我应该在第二个 VC 中创建 UIImage 属性来传递图像？

【参考方案3】：

// 将图像从一个视图传递到另一个视图：

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

   UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
[self dismissViewControllerAnimated:YES completion:^
 
     color_ViewController*secondview=[[UIStoryboard storyboardWithName:@"Main" bundle:nil]instantiateViewControllerWithIdentifier:@"color_ViewController"];
      secondview.b_image=image;
      [[NSUserDefaults standardUserDefaults ]setInteger:1 forKey:@"123"];
       [[self navigationController] pushViewController:secondview animated:YES];
 ];