官术网_书友最值得收藏!

Classes

In object-oriented programming, we cannot create an object without a blueprint that tells the application what properties and methods to expect from the object. In most object- oriented languages, this blueprint comes in the form of a class. A class is a construct that allows us to encapsulate the properties, methods, and initializers of an object into a single type. Classes can also include other items, such as subscripts; however, we are going to focus on the basic items that make up classes not only in Swift, but in other languages as well.

Let's look at how we would use a class in Swift:

class MyClass { 
  var oneProperty: String 
 
  init(oneProperty: String) { 
    self.oneProperty = oneProperty 
  } 
 
  func oneFunction() { 
 
  } 
} 

An instance of a class is typically called an object. However, in Swift, structures and classes have many of the same functionalities; therefore, we will use the term instance when referring to instances of either type.

Anyone who has used object-oriented programming in the past is probably familiar with the class type. It has been the backbone of object-oriented programming since its inception.

When we create instances of the class, it is named; therefore, the class is a named type. The class type is also a reference type.

The next type we are going to look at is arguably the most important type in the Swift language: Structures.

主站蜘蛛池模板: 定西市| 两当县| 平和县| 大城县| 波密县| 观塘区| 昌都县| 永仁县| 克东县| 崇州市| 本溪市| 广元市| 青海省| 临沭县| 喀喇| 海林市| 舒城县| 永州市| 巧家县| 神池县| 民丰县| 于田县| 宜良县| 巴青县| 洛隆县| 遂平县| 鲁山县| 永定县| 英超| 南皮县| 屯门区| 耒阳市| 芜湖县| 永和县| 大连市| 三明市| 将乐县| 西昌市| 禹州市| 南投市| 鹤壁市|