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What can Objective-C be used for?
Objective-C is the primary programming language you use when writing software for OS X and iOS. It also adds language-level support for object graph management and object literals while providing dynamic typing and binding, deferring many responsibilities until runtime.
What are Objective-C properties?
Properties in Objective-C are used to store data in instances of classes. They define memory management, type, and access attributes of the values they store such as strong , weak , assign , readonly , readwrite , etc.
Why did next use Objective-C?
It’s because Objective C has been the de facto language for Mac OS X development before it was Mac OS X. When Jobs left Apple to set up NeXT, the language Objective C was developed as a specific language that wasn’t C++ and avoided many of its pitfalls.
How do you declare a protocol in Objective-C?
so you declare a protocol in MyClass header file (or a separate header file) , and declare the required/optional event handlers that your delegate must/should implement , then declare a property in MyClass of type ( id< MyClassDelegate> ) which means any objective c class that conforms to the protocol MyClassDelegate .
What is strong property in Objective-C?
Strong just means you have a reference to an object and you will keep that object alive. As long as you hold that reference to the object in that property, that object will not be deallocated and released back into memory.
What is the protocol in Objective-C?
Objective-C allows you to define protocols, which declare the methods expected to be used for a particular situation. This chapter describes the syntax to define a formal protocol, and explains how to mark a class interface as conforming to a protocol, which means that the class must implement the required methods.
What do you need to know about Objective C?
About Objective-C. Objective-C is the primary programming language you use when writing software for OS X and iOS. It’s a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime. Objective-C inherits the syntax, primitive types, and flow control statements of C and adds syntax for defining classes
What is the purpose of declared properties in Objective C?
The Objective-C declared properties feature provides a simple way to declare and implement an object’s accessor methods. Overview You typically access an object’s properties (in the sense of its attributes and relationships) through a pair of accessor (getter/setter) methods.
When to use atomic properties in Objective C?
If the value is an Objective-C object this is the most common. the incoming value will be copied. This is used if there is a chance that the incoming object may change (e.g. NSMutableString). properties are atomic by default. Use this to avoid locking.
Why is Objective-C a dynamic programming language?
Objective-C is the primary programming language you use when writing software for OS X and iOS. It’s a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime. Objective-C inherits the syntax, primitive types, and flow control statements of C and adds syntax for defining classes and methods.