How can I open an Image in a default Image Viewer by providing the path of the file?

Question

In my project if a user clicks on an Image I will get the path with file name of the Image. I need to open the Image in a default Image Viewer of iPhone.

Thanks in advance

Answer 1

I have used QLPreviewController in one of my projects. I think that is an easiest option to implement. Also I don't know whether it is the solution what you are looking for.

I have created it with the following code

Class qlookclass = NSClassFromString(@"QLPreviewController");
        if(qlookclass){
            //check if the image exists
            if([[NSFileManager defaultManager] fileExistsAtPath:@"someimage.png"]){
                id quickLookPreview = [[qlookclass alloc]init];
                [quickLookPreview setDataSource:self];
                [self presentModalViewController:quickLookPreview animated:YES];
                [quickLookPreview release];
            }
        }

And these are the delegate methods

#pragma mark QLPreviewController delegate methods

- (NSInteger) numberOfPreviewItemsInPreviewController: (QLPreviewController *) controller {
    return 1;
}

    - (id <QLPreviewItem>) previewController: (QLPreviewController *) controller previewItemAtIndex: (NSInteger) index {

        NSURL *imageURL =  [NSURL fileURLWithPath:@"someimage.png"];

        return imageURL;
    }

You need to add QLPreviewControllerDelegate and QLPreviewControllerDataSource.

It is already an accepted answer in the question is there a class to get the default picture viewer in an app?

Hope it helps...

Answer 2

Check this question and answer Get the last saved Photo in photo album

If your image in not saved in Photos, first save image using

UIImageWriteToSavedPhotosAlbum(UIImage *image, 
                               id completionTarget, 
                               SEL completionSelector, 
                               void *contextInfo);

https://stackoverflow.com/a/179066/3976183

or you can use photos-redirect:// URL scheme, it is for Photo app. or you may use UIImagePickerController

Check also this https://stackoverflow.com/a/8872425/3976183 answer.

Answer 3

You could use a gallery or implement your own.

Just google it and you will find many gallery projects for iOS, from them you can also learn how to create one yourself.

A good one i already used is: https://github.com/mariohahn/MHVideoPhotoGallery

Answer 4

There are ways to see image in default view.

@interface YourViewController : UIViewController<QLPreviewControllerDataSource,QLPreviewControllerDelegate>


arrImages = [[NSArray alloc] initWithObjects:@"img_1.jpg", @"img_2.jpg", nil];
    QLPreviewController *previewController = [[QLPreviewController alloc]init];
    previewController.delegate = self;
    previewController.dataSource = self;
    [self presentViewController:previewController animated:TRUE completion:^{ }];


#pragma mark - Preview Delegate

- (NSInteger)numberOfPreviewItemsInPreviewController: (QLPreviewController *) controller
{
    return [arrImages count];
}

- (id <QLPreviewItem>)previewController: (QLPreviewController *)controller previewItemAtIndex:(NSInteger)index
{
    NSArray *fileComponents = [[arrayOfDocuments objectAtIndex: index] componentsSeparatedByString:@"."];
    NSString *path = [[NSBundle mainBundle] pathForResource:[fileComponents objectAtIndex:0] ofType:[fileComponents objectAtIndex:1]];
    return [NSURL fileURLWithPath:path];
}

And the other way is :

 NSString* path = [[NSBundle mainBundle] pathForResource:@"imgName" ofType:@"jpg"];
if (path)
{
    NSURL* url = [NSURL fileURLWithPath:path];
    UIDocumentInteractionController* docController = [UIDocumentInteractionController interactionControllerWithURL:url];
    docController.delegate = self;
    [docController presentPreviewAnimated:YES];
}