objective-c-blocks Archives

ios, Programming

IT Nursery

Waiting until two async blocks are executed before starting another block

When using GCD, we want to wait until two async blocks are executed and done before moving on to the next steps of ...

May 31, 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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Block Declaration Syntax List

Block syntax in Objective C (and indeed C, I presume) is notoriously incongruous. Passing blocks as arguments looks different than declaring blocks as ...

May 19, 2022
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Can I use Objective-C blocks as properties?

Is it possible to have blocks as properties using the standard property syntax? Are there any changes for ARC? 8 Answers 8

May 14, 2022
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Assign a variable inside a Block to a variable outside a Block

I’m getting an error Variable is not assignable (missing __block type specifier) on the line aPerson = participant;. How can I make sure ...

May 8, 2022
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What does the “__block” keyword mean?

What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I’d like to ...

May 5, 2022
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How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?

Is there a way to call a block with a primitive parameter after a delay, like using performSelector:withObject:afterDelay: but with an argument like ...

April 22, 2022
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