let somePoint = (1, 1) switch somePoint { case (0, 0): // 位于远点 println("(0, 0) is at the origin") case (_, 0): // x为任意值，y为0，即在 X 轴上 println("(\(somePoint.0), 0) is on the x-axis") case (0, _): // y为任意值，x为0，即在 Y 轴上 println("(0, \(somePoint.1)) is on the y-axis") case (-2...2, -2...2): // 在以原点为中心，边长为4的正方形内。 println("(\(somePoint.0), \(somePoint.1)) is inside the box") default: println("(\(somePoint.0), \(somePoint.1)) is outside of the box") }
元组是多个值组合而成的复合值。元组中的值可以是任意类型，而且每一个元素的类型可以是不同的。
1）给定元组元素命名，然后通过名称获取值(元组.名称)
let http200Status = (statusCode: 200, description: "OK") println("The status code is \(http200Status.statusCode)") println("The status message is \(http200Status.description)")
结果：200
OK
2)通过下标获取，从0开始
let http404Error = (404, "Not Found") // 通过元组.0获取第二个值 println("The status code is \(http404Error.0)") // 通过元组.1获取第二个值 println("The status message is \(http404Error.1)")
参考：http://blog.csdn.net/woaifen3344/article/details/29357261
明日计划--看函数和闭包
