如何从 iPhone 的图库中选择图像的路径？

Posted 2023-03-15

【中文标题】如何从 iPhone 的图库中选择图像的路径？

【英文标题】：How to get path of the image choose from gallery in iPhone?

【发布时间】：2013-12-16 00:34:01

【问题描述】：

我有五个按钮。在每个按钮操作上。我打开图库并选择一个图像。但问题是每个按钮操作都出现相同的路径。

UIImage* image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];

NSData* imageData = UIImagePNGRepresentation(image);

NSString * imageName = @"Myimage.png";


NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString* documentsDirectory = [paths objectAtIndex:0];

NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
 NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line

[imageData writeToFile:fullPathToFile atomically:NO];

【问题讨论】：

用不同的名字保存图片

【参考方案1】：

尝试使用下面刚刚编辑给您答案的代码 问题只是保存图像名称，尝试用不同的名称保存 下面的代码将帮助您保存具有不同名称的图像 注意：将标签值放入不同的按钮（5个按钮）并在其目标中调用bello方法

      -(void)saveImage:(UIButton*)sender
      UIImage* image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];
    
    NSData* imageData = UIImagePNGRepresentation(image);
    
    NSString * imageName =[NSString stringWithFormat:@"Myimage%d.png",sender.tag];
    
    
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    
    NSString* documentsDirectory = [paths objectAtIndex:0];
    
    NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
    NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line
    
    [imageData writeToFile:fullPathToFile atomically:NO];

这样你可以用不同的名字保存图片

【参考方案2】：

初始设置全局变量 int countVal = 1;

NSString * imageName = [NSString stringWithformat:@"%d.png",countVal]; // Imgae_name set here
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
 NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line
[imageData writeToFile:fullPathToFile atomically:NO];
count +=1; // Increment count here

【参考方案3】：

可能对你有帮助

[picker dismissModalViewControllerAnimated:YES];
imageView.image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *webData = UIImagePNGRepresentation(imageView.image);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:png];
[webData writeToFile:localFilePath atomically:YES];
NSLog(@"localFilePath.%@",localFilePath);

UIImage *image = [UIImage imageWithContentsOfFile:localFilePath];

或

使用此代码

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];

imageView.image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *webData = UIImagePNGRepresentation(imageView.image);
[imageData writeToFile:savedImagePath atomically:NO];  

 NSLog(@"localFilePath.%@",localFilePath);

如果你仍然把它弄空，那么请尝试检查 NSData 是否正确创建

NSLog(@"webData.%@",webData);

或

试试这个：我希望它对你有帮助

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
  
   UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];
  //you can use UIImagePickerControllerOriginalImage for the original image

  //Now, save the image to your apps temp folder, 

    NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:@"upload-image.tmp"];
    NSData *imageData = UIImagePNGRepresentation(img);
   //you can also use UIImageJPEGRepresentation(img,1); for jpegs
   [imageData writeToFile:path atomically:YES];

   //now call your method
  [self uploadMyImageToTheWebFromPath:path];

【参考方案4】：

我可能遗漏了一些东西，但看起来您每次都使用相同的图像名称：Myimage.png。每次图像都会以相同的名称保存在文档目录中。也许为每个按钮添加一个标签并使用它来区分 5 个不同的图像中的每一个？