Sharing functionality for an rss feed article - ios

Question

My rss app is almost complete but I need to have a "share" button on the top right corner of the web view for the articles. I have the code setup so far to show the "action" button right next to the title of the article but since there is no real code implemented it doesn't do anything :
I implemented that by basing it on code that was used for the table view cells where there is a "refresh" option implemented and I just changed the icon. I used a free open source project to put this app together and i'm having a little bit of trouble figuring out how to make that button show the share sheet that pulls up from the bottom of the app, like this:
(image from google)
I tried to implement a button dirtectly into the nav bar but I can't since the web view covers the whole screen:
So, since I couldn't put a button directly into the controller I had to encode it in like so:
In my RSSDetail.m class inside the " -(void)viewDidLoad { " :
self.navigationItem.rightBarButton = [[UIBarButtonItem = [[UIBarButtonItem
alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAction target:self
action#selector(shareButton)];
and I also have this inside the same class file :
-(void) shareButton {
self.webView.userInteractionEnabled = YES;
self.webView.aplha = 0.3;
}
So as you can see, this little bit of code in that class puts the icon where I want it. But my question is, is there code i can implement into my " -(void) shareButton " method that will implement the sharing functionality?
Also, I need for the button to actually say "Share" as opposed to the icon, is there anyway I can change the code for the "Action" rightBarButton method to allow me to input the word instead of an icon?
Thanks in advance

Answer 1

As I understand you want to implement iOS native sharing functionality. Here is an example of implementation:
- (void)shareButtonPressed {
// 1
// If you want to use UIImage, make sure you have image with that name, otherwise it will crash.
NSArray *activityItems = #[#"Message to share", [UIImage imageNamed:#"imageToShare"]];
// 2
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
// 3
activityViewController.excludedActivityTypes = #[UIActivityTypeCopyToPasteboard, UIActivityTypeAirDrop, UIActivityTypeAssignToContact, UIActivityTypeAddToReadingList, UIActivityTypePrint, UIActivityTypeSaveToCameraRoll, UIActivityTypeMessage, UIActivityTypeMail];
// 4
[activityViewController setCompletionHandler:^(__unused NSString *activityType, __unused BOOL completed){
// Custom completion implementation
}];
[self presentViewController:activityViewController animated:YES completion:NULL];
}
Description:
Prepare activity items which you want to share such string, image, URL.
Initialize activity view controller with the items you want to share + custom activities (only if needed). Custom activities means that you will create your own buttons using UIActivity with own actions, images, titles (more info here). For example, implement sharing to a third party app which does not have share extension.
Here you can specify excluded activity types. In this example I have removed everything such as copy, airdrop and etc.
In completion block you can see which activityType was selected and whether user cancelled or not.
More information on UIActivityViewController can be found here.
Regarding second part of your question about UIBarButtonItem. UIBarButtonItem can be initialised with custom title using this:
UIBarButtonItem *shareButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Share" style:UIBarButtonItemStylePlain target:self action:#selector(shareButtonPressed)];
self.navigationItem.rightBarButtonItem = shareButtonItem;
Be aware that UIBarButtonItem has UIBarButtonItemStyle which you can change. UIBarButtonItemStylePlain (will create a button with a regular font) and UIBarButtonItemStyleDone (will create a button with a bold font).