objective-c Archives - Page 3 of 11

objective-c, Programming

IT Nursery

Custom dealloc and ARC (Objective-C)

In my little iPad app I have a “switch language” function that uses an observer. Every view controller registers itself with my observer ...

May 29, 2022
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objective-c, Programming

IT Nursery

registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later

When trying to register for push notifications under iOS 8.x: application.registerForRemoteNotificationTypes(UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound) I get the following error: registerForRemoteNotificationTypes: is not ...

May 29, 2022
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objective-c, Programming

IT Nursery

How to tell when UITableView has completed ReloadData?

I am trying to scroll to the bottom of a UITableView after it is done performing [self.tableView reloadData] I originally had...

May 29, 2022
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objective-c, Programming

IT Nursery

What is the Swift equivalent of respondsToSelector?

I’ve googled but not been able to find out what the swift equivalent to respondsToSelector: is. This is the only thing I could ...

May 29, 2022
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objective-c, Programming

IT Nursery

Swift compiler error: “non-modular header inside framework module”

Now I would like to migrate my ObjC framework to Swift and I got the following error: include of non-modular header inside framework ...

May 29, 2022
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objective-c, Programming

IT Nursery

How to check if NSString begins with a certain character

How do you check if an NSString begins with a certain character (the character *). The * is an indicator for the type ...

May 29, 2022
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objective-c, Programming

IT Nursery

capturing self strongly in this block is likely to lead to a retain cycle

How can I avoid this warning in xcode. Here is the code snippet:...

May 28, 2022
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objective-c, Programming

IT Nursery

In a storyboard, how do I make a custom cell for use with multiple controllers?

I’m trying to use storyboards in an app I’m working on. In the app there are Lists and Users and each contains a ...

May 28, 2022
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objective-c, Programming

IT Nursery

invalid context 0x0 under iOS 7.0 and system degradation

I’ve read as many search results I could find on this dreaded problem, unfortunatelly, each one seems to focus on a specific function ...

May 27, 2022
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objective-c, Programming

IT Nursery

How do I avoid capturing self in blocks when implementing an API?

I have a working app and I’m working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing ...

May 27, 2022
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