【Swift初见】Swift构造过程

struct Rect {
    var width : Double
    init(){
        width = 10.0
    }
}

struct Rect {
    var width : Double
    var height : Double = 10.0
    init(Square square : Double){
        width = square
    }
    init(Rectangle rectangle : Double){
        width = rectangle
    }
    func description (){
        println("width is \(width)")
    }
}

var graph : Rect = Rect(Square: 10)

var graph2 = Rect(Rectangle: 20)
graph.description()
graph2.description()

struct Rect {
    var width : Double = 10.0
    var height : Double = 10.0
}

var graph : Rect = Rect()

struct Rect {
    var width : Double = 10.0
    var height : Double = 10.0
    init (){
        
    }
    init (h : Double){
        self.height = h
        println("h is \(h)")
    }
    init (printH : Double){
        self.init(h : printH)
    }
}

var graph : Rect = Rect(printH: 3.2)
var graph2 = Rect(h: 4.3)

便利构造器是辅助构造器，我们可以定义一个便利构造器来调用同一个类中的指定构造器，并为其提供参数和默认值。

下次继续。

【Swift初见】Swift构造过程

原文：http://blog.csdn.net/weasleyqi/article/details/44206117