Q: How will you Verify dynamically at runtime to discover if a class supports a technique that may reply to a particular message?

The selector could possibly be utilized having an instance of every in the courses to invoke its run method, even though the implementation may be really distinct for each.

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The answer Here's to employ a placeholder worth or picture and load the information asynchronously inside the history. After the facts is loaded, a concept can then be sent to the primary thread to update the appropriate cells.

Apple offers detailed documentation on how to use Swift with Objective-C, which each knowledgeable developer must grow to be aware of.

Having said that, there are plenty of concerns an experienced iOS developer should really pay attention to about Swift and its interoperability with Objective-C.

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