Get the local file path of a PHAsset

问题

I have a photo I want my user to be able to share on Instagram and I need to get the local file directory of the photo.

However I am fetching my images as a PHAsset (not the ALAsset all the other answers seem to cover on this subject).

Looking at the PHAsset documentation I don't see a 'local directory' variable.

Do you know how I can get the path to a photo from the users camera roll using the new ios8 Photo's framework?

Here is my code for loading the last image in the users photo roll

public func loadLastPhotoIntoGalleryIcon()
{
    if(PHPhotoLibrary.authorizationStatus() != PHAuthorizationStatus.Authorized)
    {
        return
    }
    var fetchOptions:PHFetchOptions = PHFetchOptions()
    fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
    var fetchResult:PHFetchResult = PHAsset.fetchAssetsWithMediaType(PHAssetMediaType.Image, options: fetchOptions)

    var lastAsset:PHAsset = fetchResult.firstObject as PHAsset

    var options:PHImageRequestOptions = PHImageRequestOptions()
    options.version = PHImageRequestOptionsVersion.Current
    PHImageManager.defaultManager().requestImageForAsset(lastAsset, targetSize: _view.getGalleryIconSize(), contentMode: PHImageContentMode.AspectFill, options: options)
    {
        (result, objects) -> Void in
        self._view.setGalleryIcon(result)
    }

}

回答1:

Use content editing input:

asset.requestContentEditingInputWithOptions(PHContentEditingInputRequestOptions()) { (input, _) in
    let url = input.fullSizeImageURL
}

Make sure that the asset is PHAssetMediaType.Image or otherwise it may crash when unpacking an optional.

回答2:

func getImagesFromAsset(anAsset: PHAsset) {
    PHImageManager.default().requestImage(for: anAsset, targetSize: CGSize(width: 600, height: 600), contentMode: .aspectFill, options: nil, resultHandler: { (image, info) in
        //resultHandler have info ([AnyHashable: Any])
        print(info!["PHImageFileURLKey"])
        if let img = image {
            self.imgv.image = img
        }
    })
}

this might help paste this in you CellForRowAt method and pass the PHAsset in argument.

回答3:

PHAsset *asset = YOUR_ASSET;

PHImageManager *manager = [PHImageManager defaultManager];
PHImageRequestOptions *options = [PHImageRequestOptions new];
options.synchronous = YES;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
options.resizeMode = PHImageRequestOptionsResizeModeNone;
options.networkAccessAllowed = NO;

[manager requestImageForAsset:YOUR_ASSET targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage *resultImage, NSDictionary *info){

    NSURL *filePath = [info valueForKeyPath:@"PHImageFileURLKey"]

}];

回答4:

asset=PHAsset *asset

[asset requestContentEditingInputWithOptions:[PHContentEditingInputRequestOptions new] completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
   NSURL *imageURL = contentEditingInput.fullSizeImageURL;
}];

Make sure your PHAsset should be an image type to check this PHAssetMediaType.Image should be true

回答5:

Yes, you must convert PHAsset to ALAsset, then you can grab the url from ALAsset. Something like this: PHImageManager.defaultManager().requestAVAssetForVideo....

回答6:

Requests asset information for beginning a content editing session.

- (PHContentEditingInputRequestID)requestContentEditingInputWithOptions:(PHContentEditingInputRequestOptions *)options 
                                                      completionHandler:(void (^)(PHContentEditingInput *contentEditingInput, NSDictionary *info))completionHandler;

The URL to a file that contains the full-sized image data.

@property(readonly, copy) NSURL *fullSizeImageURL;

来源：https://stackoverflow.com/questions/28327824/get-the-local-file-path-of-a-phasset

标签

ios

swift

instagram

phasset

photosframework