Swift: Developing iOS Applications

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 ...