Summary of Key-value coding (part 2).
Before reading.
This Summary is just write down when I study iOS.
So, it’s not good enough to read, plz understand about that.
Using Key-Value Compliant Objects.
If you inherit from ‘NSObject’ that directly or indirectly, which both adopts the ‘NSKeyValueCoding’ protocol.
(c.f : Objects typically adopt key-value coding when they inherit from ‘NSObject’)
And ‘NSKeyValueCoding’ provides a default implementation for the ‘essential methods.’
(c.f : ‘essential methods’ are such an object enables other objects, through a compact messaging interface.)
How to using Key-Value Compliant Objects ?
Access object properties.
The protocol methods such as the generic getter ‘valueForKey:’, the generic setter ‘setValue:forKey:’.
These are for accessing object properties by their name, or key.
(c.f : when accessing object properties by name or key, which parameterized as a ‘String’)
The default implementations of these and related methods use the key to locate and interact with the underlying data.
(c.f : Will summarize about ‘Accessing Object Properties’ for describe ‘the default implementations of these and related methods’)
Reference documentation.
Reference this documentation when I write this summary.
