KVC STANDS for Key-Value Coding. It's a mechanism by which an object's properties can be accessed using STRING's at RUNTIME rather than having to statically know the property names at development time. KVO stands for Key-Value Observing and allows a controller or class to OBSERVE changes to a property value.

Let's SAY there is a property name on a class:

@property (nonatomic, copy) NSString *name;

We can access it using KVC:

NSString *n = [object valueForKey:@"name"]

And we can modify it's value by sending it the message:

[object setValue:@"Mary" forKey:@"name"]

KVC stands for Key-Value Coding. It's a mechanism by which an object's properties can be accessed using string's at runtime rather than having to statically know the property names at development time. KVO stands for Key-Value Observing and allows a controller or class to observe changes to a property value.

Let's say there is a property name on a class:

@property (nonatomic, copy) NSString *name;

We can access it using KVC:

NSString *n = [object valueForKey:@"name"]

And we can modify it's value by sending it the message:

[object setValue:@"Mary" forKey:@"name"]