在objective-c中的UIImage中图像名称为空

Posted 2023-03-11

【中文标题】在objective-c中的UIImage中图像名称为空

【英文标题】：image name is null in UIImage in objective-c

【发布时间】：2016-06-30 06:27:38

【问题描述】：

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

     [picker dismissViewControllerAnimated:YES completion:nil];
     UIImage *image =[[UIImage alloc] init];
     image =[info objectForKey:@"UIImagePickerControllerOriginalImage"];
     NSURL *imagePath = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
     imageName = [imagePath lastPathComponent];
     NSData *imageData;
     NSString *extensionOFImage =[imageName substringFromIndex:[imageName rangeOfString:@"."].location+1 ];

     if ([extensionOFImage isEqualToString:@"jpg"])
     
          imageData = UIImagePNGRepresentation(image);
     
     else
     
          imageData = UIImageJPEGRepresentation(image, 1.0);
     

     int imageSize=imageData.length/1024;
     NSLog(@"imageSize--->%d", imageSize);
     if (imageName!=nil) 
         NSLog(@"imageName--->%@",imageName);
     
     else
     
         NSLog(@"no image name found");
     
     //commented ashok
     NSURL *resourceURL = [info objectForKey:UIImagePickerControllerMediaURL];
     resourceURL = [info objectForKey:UIImagePickerControllerReferenceURL];
     ALAssetsLibrary *assetLibrary = [ALAssetsLibrary new];
     [assetLibrary assetForURL:resourceURL
                  resultBlock:^(ALAsset *asset) 
           // get data
          ALAssetRepresentation *assetRep = [asset defaultRepresentation];
          CGImageRef cgImg = [assetRep fullResolutionImage];
          filename = [assetRep filename];
          NSLog(@"file name is:%@", filename);
     
     failureBlock:^(NSError *error) 
          NSLog(@"%@", error);
     ];


-(void)send message

    NSLog(@"image name is:%@",filename);
      //image name is: IMG_0004.JPG       
    senderImgName=[UIImage imageNamed:filename];
    NSLog(@"sender image name is :%@",senderImgName);   
      //sender image name is: null

【问题讨论】：

@BhavinRamani - 文件名为：IMG_0005.JPG

@BhavinRamani 文件名是字符串变量.. 在具有图像名称的文件名中

确认您的图片资源已添加到您的目标中。

@Desdenova 实际上我正在从照片库中挑选图像。所以应该在这里传递图像名称

这会对你有所帮助 - ***.com/questions/6674549/…

【参考方案1】：

当你使用UIImagePickerController时，你需要将UIImage对象赋予imageView而不是名称，像这样更改你的代码

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info 
     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
     self.imageView.image = image

希望这会对你有所帮助。

【讨论】：

感谢您的回复.. 但我正在使用objective-c .. 你会发布objective-c 代码'

@satya 使用我的答案，因为 singare 使用了已弃用的方法。

我正在更新我的查询.. 请检查一次

你想做什么？仅添加代码对我们没有帮助。请指定您在从ImagePicker 选择图像后要做什么。

从图像选择器中选择图像后，我想将图像发送到服务器。

【参考方案2】：

试试这个

//This will show the picker
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];
//Deprecated In ios6[self presentModalViewController:picker animated:YES]; 
[picker release];

//这个委托方法会给你选择的图像。

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

    imgProfilePic.image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [picker dismissModalViewControllerAnimated:YES];


- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker

    [picker dismissModalViewControllerAnimated:YES];

【讨论】：

此方法已弃用。

@Signare 我正在更新我的查询.. 请您检查一次

@Signare 请给我指导..我需要你的帮助

【参考方案3】：

检查您是否将图像添加到项目中。 如果项目中存在图像，请检查它是否包含在属性中使用目标。

【参考方案4】：

试试这个

ALAssetRepresentation *assetRep = [asset defaultRepresentation];
CGImageRef cgImg = [assetRep fullResolutionImage];
UIImage* image = [UIImage imageWithCGImage:cgImg];

【讨论】：

感谢您的回复.. 但我遇到了错误...您能给我一些其他的 ide

你能不能来聊天室我想和你谈谈