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To subclass or not to subclass, that is the question
Gerriet M. Denkmann
Documentation about UIActivity:
“You should subclass UIActivity only if you want to provide custom services to the user. " “This class must be subclassed before it can be used. " So what? Kind of confusing. Gerriet. |
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Gerriet M. Denkmann
On 9 Oct 2018, at 10:47, Gerriet M. Denkmann <g@...> wrote: Maybe it works like this: NSArray *activityItems = @[ someUrl ]; UIActivityViewController *vc = [ [UIActivityViewController alloc] initWithActivityItems: activityItems applicationActivities: nil ]; // If (and only if) one wants to provide custom services to the user, then applicationActivities must *not* be nil, but contain one or more subclasses of UIActivity vc.excludedActivityTypes = @[ everything except UIActivityTypeAirDrop ]; [ self presentViewController: vc …]; My current problem: The UIActivityViewController has AirDrop (as it should) but it also has some other things, which do *not* make sense for my app at all: One row with: Copy to Documents Copy to Files Copy to PDF Expert … More (Where one can switch on “Add to Notes”) and another row with: … More (Where one can switch on “Save to Files” and “Save in LINE Keep”) I really just want AirDrop and nothing else. How can this be accomplished? One final point: iOS → macOS: My iOS device can copy “someUrl” to the Downloads folder of the recipient. Which is kind of ok. But is there a way to specify a more specific destination? Like the Application Support Folder of some app? iOS → iOS Here the AirDrop should only be done to another copy of my app. Can this somehow be specified? Gerriet. |
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Quincey Morris
On Oct 8, 2018, at 20:47 , Gerriet M. Denkmann <g@...> wrote:
It looks to me like the first quoted sentence is just poorly worded. I think it’s saying you should *use a UIActivity subclass* if you want to provide custom services. Note that UIActivity is described in the documentation as an abstract class, so I doubt there’s any use-case where you’d instantiate one literally of that class. |
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