In earlier versions of the Cocoa toolchain you could also call a method that the compiler, at compile time, couldn’t determine the existence of. While this may sound like a powerful capability, it was more commonly a source of hair-pulling debugging scenarios.
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UITableViewDelegate: Invoked if the user has, for example, selected a cell, or to determine what the height of a row should be.
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An enumeration defines a common type for a group of related values and enables iOS developers to work with those values in a type-safe way within their code.This question helps in understanding the developer’s knowledge of enumeration in Swift language.
These new methods Gozque then be invoked on any NSString or NSMutableString in any class that imports the category header file.
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