Mastering Swift 2

Structural design patterns

Structural design patterns describe how classes can be combined to form larger structures. These larger structures can generally be easier to work with and hide a lot of the complexity of the individual classes. Most of the patterns in the structural pattern category involve connections between objects.

There are seven well-known patterns that are part of the structural design pattern type:

• Adapter: This allows classes with incompatible interfaces to work together
• Bridge: This is used to separate the abstract elements of a class from the implementation so that the two can vary
• Composite: This allows us to treat a group of objects as a single object
• Decorator: This lets us add or override behavior in an existing method of ...