无法显示从照片库中挑选的图像

Posted 2023-03-05

【中文标题】无法显示从照片库中挑选的图像

【英文标题】：can't show picking image from photo library

【发布时间】：2013-04-04 05:00:58

【问题描述】：

我正在使用图像选择器从照片库中选择照片。当我单击按钮时，它会显示照片库。但是当我单击特定图像时，它会关闭 modalView 并且图像不会加载到查看。

代码：

-(void)showcamera:(id)sender

    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc]init];
    imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    imagePickerController.sourceType =  UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentModalViewController:imagePickerController animated:YES];




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


    // Dismiss the image selection, hide the picker and

    //show the image view with the picked image

    [picker dismissModalViewControllerAnimated:YES];
    UIImage *newImage = image;

【问题讨论】：

我认为它的 bcoz 您在关闭选择器后设置 newImage。这是我的意见。您还必须初始化图像。

为什么还要初始化两次imagePickerController？

当我使用 imagePickerController.allowsEditing=YES;编码工作完美。谢谢大家

当我使用 imagePickerController.allowsEditing=YES;矩形框和导航栏内显示的图像，带有选择、取消按钮。我不要盒子。如何取消？

【参考方案1】：

使用此代码：

在.h文件中

UIImageView *newImage;
    UIImagePickerController *imagePicker;

在 .m 文件中

- (void)imageTaped:(UITapGestureRecognizer *)tapGesture 
    imagePicker=[[UIImagePickerController alloc]init];

    imagePicker.delegate = self;

    imagePicker.allowsEditing =NO;

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentModalViewController:imagePicker animated:YES];





-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
    //release picker
    [picker dismissModalViewControllerAnimated:YES];

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


    newImage = [[UIImageView alloc] initWithImage:[info objectForKey:UIImagePickerControllerOriginalImage]];
    [self.view addSubview:mewImage];
    [picker dismissModalViewControllerAnimated:YES];

【讨论】：

当我使用 imagePickerController.allowsEditing=YES;矩形框和导航栏内显示的图像，带有选择，取消按钮。我不要盒子。如何取消？

抱歉，我的代码中我使用的是图像裁剪功能，这就是原因。只需执行imagePicker.allowsEditing =NO;，它就不会显示该框。

你必须把这行[info objectForKey:UIImagePickerControllerEditedImage]改成[info objectForKey:UIImagePickerControllerOriginalImage]

但是如何从图像中返回..在视图中加载图像后我可以添加这一行 [picker dismissModalViewControllerAnimated:YES];内部按钮按下取消

我们在取消按钮中添加了[picker dismissModalViewControllerAnimated:YES];。我们不是吗？还是你的意思是别的？

【参考方案2】：

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

    imgPicked = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    
        [imagePickerController dismissModalViewControllerAnimated:YES];
    

在 .h 中声明

UIImage *imgPicked; 

在ViewDidLoad

imgPicked = [[UIImage alloc]init];

【讨论】：

什么？我找不到你...拿一个

图片从库中选取后不显示

当我使用 imagePickerController.allowsEditing=YES;时，您的代码也可以工作。

【参考方案3】：

最好的方法是将您的Image 添加到UIImageView，

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

     UIImageView *ImgView = [[UIImageView alloc] initWithFrame:CGRectMake(@"As U Want")];
     ImgView.image = image;
    [self.View addSubview: ImgView];


    [picker dismissModalViewControllerAnimated:YES];