what number distinctive annotations is accessible in Objective-C?

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Posted On: Feb 22, 2018

Here are the following distinctive annotations that are accessible in Objective C:

_Null_unspecified, which bridges to a Swift certainly unwrapped optional. This is the default.
_Nonnull, the esteem won’t be nil it bridges to a customary reference.
_Nullable a value can be nil; it bridges to a discretionary.
_Null_resettable this value can never be nil, when perused however you can set it to know to reset it. This just applies property.

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