Swift Object Methods

The Swift class methods are also divided into object methods and class methods, so let's take a quick look at the object methods.

We analyze it in three categories.

Let's take a look at an example, create a student class Student, he has four attribute names name, age, sex sex, knowledge knowledge

We define three methods of learning

1, without parameters, as long as the students call the learning method knowledge +1

2, with two parameters, the first parameter subject represents the learning course, the second parameter indicates the learning lesson

3, parameter same as 2 but we specify an external name for each parameter

Class student{    var name= ""    var age:int=18    var sex:string = "Male"    var knowledge:int=10//student knowledge, default is ten        / /No parameter method students learn after knowledge increase    func study () {        self.knowledge++    }        //Two parameters for the method, the first parameter for the learning course, the second parameter for the learning lesson, Suppose that learning a lesson mathematics knowledge increases by 2, otherwise knowledge increases by 1.    Func study1 (subject:string, withtime:int) {        if (subject== "math") {            knowledge+=2*withtime        }else{            Knowledge+=1*withtime        }    }        //Specify method for parameter external name    func study2 (subjectname subject:string,studytime Withtime:int) {                if (subject== "math") {            knowledge+=2*withtime        }else{            knowledge+=1*withtime        }    }        }

The calls to the above three functions are as follows

var s=student ();        Call the parameterless function, directly using        s.study ()        println (S.knowledge)                //Call a function of multiple parameters, you need to note the following two points        //1, the parameter name of the first argument is not required to write out the default,        / /2, starting with the second argument, the parameter name needs to be written out (for example, the first parameter name Withtime to be written out)        s.study1 ("math", Withtime:5)        println (S.knowledge)                // Calls a function that specifies the name of an external parameter, which must be called with the specified external argument name        s.study2 (subjectname: "Sport", Studytime:3)        println (S.knowledge)

We're going to see the three function calls that correspond to what we're talking about.

// Call the parameterless function directly using

// function that calls multiple parameters, note the following two points

//1, the parameter name of the first argument does not need to be written out by default,

//2, starting with the second argument, the parameter name needs to be written out (e.g. the name of the first parameter in the example withtime needs to be written out)

// call a function that specifies the name of an external parameter, which must be called using the specified external argument name

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Swift Object Methods