Objective-C > Dynamic Binding

In this lesson, we will learn about:

• Static Typing VS Dynamic Typing
• Code example with Objective-C id type
• Dynamic Binding

<Static Typing VS Dynamic Typing>

Static typing - we have provided enough information for compiler to check for errors during the compilation process.

Dynamic typing - allows us to declare a variable that is capable of storing any type of object, regardless of its class origins.

This is achieved using the Objective- id type.

<Code example with Objective-C id type>

id object1;

object1 = [[savingAccount alloc] init];

[object1 setAccount: 455654545];

[object1 setBalance: 1234.56];

object1 = [[CustomerInfo alloc] init];

[object1 displayInfo];

<Dynamic Binding>

Dynamic binding means that allows users declare the variable with id type without prior knowledge of the type of object currently assigned to the variable.