UIActivityViewController issue iOS 7 and iOS 8?

Question

I’m building an article reading app for iPad. I have integrated a social sharing functionality which means user can share articles on Facebook, and google mail. I’m using

Answer 1

In Swift, You can use '?' instead checking OS version. AVC.popoverPresentationController?.sourceView = _webView

Answer 2

A lot might argue that checking for existence of the class explicitly is better than checking a hard coded version number. UIPopoverPresentationController may be deprecated at some future point, or there might be a (future ?) device which does not support the class, like the iPhone never used to support UIPopoverController or UISplitViewController..

if (  NSClassFromString(@"UIPopoverPresentationController")   ) {

AVC.popoverPresentationController.sourceView = _webView;


}

Answer 3

Following line is the issue

AVC.popoverPresentationController.sourceView = _webView;

You will have to put iOS8 condition in order popoverPresentationController is introduced for iOS 8 and later so you can not use it with iOS 7

For checking for iOS8 you can define a macro like found from here

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

And use it in following way.

     NSURL *linkURL = [NSURL URLWithString:_DetailModal1[4]];//article url
     NSMutableAttributedString *stringText = [[NSMutableAttributedString alloc]  initWithString:_DetailModal1[0]];//_DetailModal1[0] contain article title////
    [stringText addAttribute:NSLinkAttributeName value:linkURL range:NSMakeRange(0, stringText.length)];
    NSArray * itemsArray = @[[NSString stringWithFormat:@"%@",_DetailModal1[0]], [NSURL URLWithString:_DetailModal1[4]]];
    NSArray * applicationActivities = nil;
    UIActivityViewController * AVC = [[UIActivityViewController alloc] initWithActivityItems:itemsArray applicationActivities:applicationActivities];

   if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")){

        AVC.popoverPresentationController.sourceView = _webView;
   }
   [self presentViewController:AVC animated:YES completion:nil];

Refer this for more info about what has changed for UIActivityViewController in iOS8