A lazy property is a property whose initial value is not calculated until it is first used. Lazy storage properties are declared by prefixing the declaration with a lazy modifier.
Using a method that takes an NSError means using an optional variable (a variable that may or may not exist) and the unwrapping the error if it exists.
The Apple frameworks are used in the same manner in Swift, so an experienced iOS developer is able to transfer most of his or her knowledge to writing Swift code.
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Keep in mind, though, that changes to Core Data objects do not necessarily propagate immediately to other threads. In the standard case, Core Data objects that are loaded into memory are not updated on a different thread until those objects are fetched again from persistent storage.
Ask the developer for sample code and check for the comments/documentation and the coding style before hiring.
You don't need to bid on projects in a race to the bottom. Instead, just apply to job descriptions that meet your criteria.
These new methods can then be invoked on any NSString or NSMutableString in any class that imports the category header file.
It is básico to consider your unique use case and the expertise it requires when searching for a mobile app developer for hire. For here instance, if you are building an e-commerce app, your engineer should have experience creating apps with strong security features and integrating payment systems.