如何从 iPhone 的图库中选择图像的路径？答案

【问题标题】：How to get path of the image choose from gallery in iPhone?如何从 iPhone 的图库中选择图像的路径？
【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

标签： ios iphone objective-c image ipad

【解决方案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

【讨论】：

【解决方案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

【讨论】：

【解决方案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];
}

【讨论】：

【解决方案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？

【讨论】：