swift版的元组

swift版的元组

说明

元组的内容并不多,使用的话跟普通变量类似,以下是测试源码:

//
//  ViewController.swift
//  Tuples
//
//  Created by YouXianMing on 15/10/12.
//

import UIKit

class ViewController: UIViewController {

    var tuplesValues : (duration : NSTimeInterval, animated : Bool)?

    override func viewDidLoad() {

        super.viewDidLoad()

        unnamedTuples()

        namedTuples()

        tuplesValues = (duration : , animated : true)
        if let _ = tuplesValues {

            print(tuplesValues!.duration)
            print(tuplesValues!.animated)

        } else {

        }
    }

    // Unnamed Tuples
    func unnamedTuples() {

        let tipAndTotalOne = (4.00, 25.19)
        let tipAndTotalTwo : (Double, Double) = (4.00, 25.19)

        print(tipAndTotalOne)
        print(tipAndTotalTwo)
    }

    // Named Tuples
    func namedTuples() {

        let tipAndTotalNamedOne = (tipAmt : 4.00, total : 25.19)
        print("\(tipAndTotalNamedOne.tipAmt) + \(tipAndTotalNamedOne.total)")

        let tipAndTotalNamedTwo : (tipAmt : Double, total : Double) = (4.00, 25.19)
        print("\(tipAndTotalNamedTwo.tipAmt) + \(tipAndTotalNamedTwo.total)")
    }

    // Returning Tuples
    func calcTipWithTipPct(tipPct:Double) -> (tipAmt : Double, total : Double) {

        let tipAmt     = tipPct *
        let finalTotal = tipAmt * 0.56

        return (tipAmt, finalTotal)
    }

    // animationOptionsWith
    func animationOptionsWith(duration : NSTimeInterval, animated : Bool) {

    }
}

细节