如何从UIImageview获取图像文件路径

Question

I have a UIImageView that diaplays an image. Then I have a button titled 'save' . What I want to do is that when I click the button, it should save the image file name into a plist for further retrieval and stuff.

I know how to save into plist and all. The problem is only that I don't know how to get the file path of the image being displayed in the UIImageView .

I did homework and found few articles but im still confused. Any help will be appreciated.

Answer 1

我不认为有可能从UIImage获取图像路径，如果按路径表示磁盘上的原始位置，那么我不认为可以做到这一点

Answer 2

Create UIImageview as CustomImageview class with NSString variable.Then while showing that image,store the image file path in that string variable.Then you can get it where ever you want with the use of that string.Use the following code

 #import <UIKit/UIKit.h> 
 @interface Imager : UIImageView  
 { 
 NSString* imageFileName; @property(nonatomic,retain)NSString* imageFileName;
 }
 @end

 #import "Imager.h" 
 @implementation 
 @synthesize imageFileName

and the assign the filepathname where you are assigning the image like your Imageview.image = UIImage; your Imageview.imageFileName=yourImageFilepath;

to get the yourImageFilepath add "AssetsLibrary.framework" to your framework folder.Then add #import "AssetsLibrary/AssetsLibrary.h"; to the header file of your class.

then add the following code in "didFinishPickingMediaWithInfo" method

UIImage *viewImage = yourImage;
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];  
[library writeImageToSavedPhotosAlbum:[viewImage CGImage] orientation:   (ALAssetOrientation)[viewImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error)
{  
if (error) 
{  
    NSLog(@"error");  
} 
else 
{  
    NSLog(@"url %@", assetURL);  
}  
}];  
[library release];

It will return a url.that is your yourImageFilepath.

Answer 3

The best way to do this is to Save the image in document folder with name image1, image2, etc or the exact name of the image if you know it. And you can save the image names in the plist. Using the names here you can do the further stuff easily.