本系列编号基本对应stanford CS193P的课程编号，可能有一两节课的误差：比如我标（1）就对应Lecture 1，但有时我做得快了就变成(1)对应lecture 1的全部和lecture 2的一部分。
前言：
我没学过OC，想学swift，可是网上只有教swift基本语法和写命令行程序的初级教程。
所以我只好拿个OC的教程，一边学swift，一边把OC的教程里的代码改成swift的，我想改完了之后应该就等于看了swift的教程了吧。
正文：
本文包括两个类，Card和Deck，以及一个单元测试类。写完之后的感觉：原来的教程教OC语法的部分看得我睡着了，而直接用swift写极简单。
具体值得记录的点有：
1.swift没有自动类型转换，只有类型推断，在arc4random % count 的时候无法自动转换类型。所以我加了个强制类型转换。
2.我debug测试类的时候发现xcode里显示不出我往deck.cards里插入的card，显示为invalid，但实际上是正确的。可能和我用的xcode6还是beta1有关。
3.drawRandomCard 的时候一开始我先做了remove，后做return，结果已经被remove掉的元素无法return。后加了个中间变量先暂存了一下要return的card。
4.感觉原来的OC语法比swift复杂很多。
5.感觉MVC部分CS193P的老头讲得挺好的。
代码：
首先是测试类：
1 //
2 // CardGameTests.swift
3 // CardGameTests
4 //
5 // Created by colin.zt on 14-6-6.
6 // Copyright (c) 2014年 Ting. All rights reserved.
7 //
8
9 import XCTest
10
11 class CardGameTests: XCTestCase {
12
13 override func setUp() {
14 super.setUp()
15 // Put setup code here. This method is called before the invocation of each test method in the class.
16 }
17
18 override func tearDown() {
19 // Put teardown code here. This method is called after the invocation of each test method in the class.
20 super.tearDown()
21 }
22
23 func testCard() {
24 // This is an example of a functional test case.
25 // XCTAssert(true, "Pass")
26 var a: Card = Card()
27 var b: Card = Card()
28 a.contents = "test card a"
29 b.contents = "test card b"
30 var cards: Card[] = [a,b]
31 var result = a.match(cards)
32 // println(a.contents)
33 XCTAssert(result == 1, "Pass")
34 }
35
36 func testDeck() {
37
38 var deck_a:Deck = Deck()
39
40 var card_a:Card = Card()
41 var card_b:Card = Card()
42 var card_c:Card = Card()
43
44 card_a.contents = "card a"
45 card_b.contents = "card b"
46 card_c.contents = "card c"
47
48 deck_a.addCard(card_a)
49 pirnt_all_cards_left(deck_a)
50 XCTAssert(deck_a.cards[0].contents == "card a", "Pass")
51
52 deck_a.addCard(card_b)
53 pirnt_all_cards_left(deck_a)
54 XCTAssert(deck_a.cards[0].contents == "card a", "Pass")
55 XCTAssert(deck_a.cards[1].contents == "card b", "Pass")
56
57 deck_a.addCard(card_c,atTop:true)
58 pirnt_all_cards_left(deck_a)
59 XCTAssert(deck_a.cards[0].contents == "card c", "Pass")
60 XCTAssert(deck_a.cards[1].contents == "card a", "Pass")
61 XCTAssert(deck_a.cards[2].contents == "card b", "Pass")
62
63 var random_card: Card = deck_a.drawRandomCard()
64 println("Now draw this random card:")
65 println(random_card.contents)
66 pirnt_all_cards_left(deck_a)
67 XCTAssert(random_card.match(deck_a.cards) == 0, "Pass")
68 XCTAssert(deck_a.cards.count == 2)
69
70 var random_card_2: Card = deck_a.drawRandomCard()
71 println("Now draw this random card_2:")
72 println(random_card_2.contents)
73 pirnt_all_cards_left(deck_a)
74 XCTAssert(random_card_2.match(deck_a.cards) == 0, "Pass")
75 XCTAssert(deck_a.cards.count == 1)
76 }
77
78 func pirnt_all_cards_left(deck:Deck){
79 println("_______________________________________")
80 println("Now these cards in deck")
81 for card in deck.cards{
82 println(card.contents)
83 }
84 println("_______________________________________")
85 }
86
87 func testPerformanceExample() {
88 // This is an example of a performance test case.
89 self.measureBlock() {
90 // Put the code you want to measure the time of here.
91 }
92 }
93
94 }
然后是Card类
1 //
2 // Card.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-18.
6 // Copyright (c) 2014年 Ting. All rights reserved.
7 //
8
9 import UIKit
10
11 class Card: NSObject {
12
13 init(){} //empty init method
14 var contents: String = "" //give it a default value
15 var chosen: Bool = false
16 var matched: Bool = false
17
18 //check if some card mathes some cards
19 func match(cards: Card[])->Int{
20 var score = 0
21 for card in cards{
22 if card.contents == self.contents
23 {
24 score = 1
25 }
26 }
27 return score
28 }
29
30
31 }
最后是Deck类
1 //
2 // Deck.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-18.
6 // Copyright (c) 2014年 Ting. All rights reserved.
7 //
8
9 import UIKit
10
11 class Deck: NSObject {
12
13 init(){} //init
14 var cards: Card[] = [] //a deck has an array of cards, empty by default
15
16 //add a card into this deck‘s cards array
17 func addCard(card: Card){
18 self.addCard(card,atTop:false)
19 }
20
21 //add a card into this decks‘s cards array‘s top, first element
22 func addCard(card:Card,atTop:Bool){
23 if atTop {
24 cards.insert(card, atIndex: 0)
25 }
26 else{
27 cards.append(card)
28 }
29 }
30
31 //draw a card from the deck randomly, it removes the card
32 func drawRandomCard()->Card{
33 var index = Int(arc4random()) % self.cards.count
34 var random_card:Card = cards[index]
35 cards.removeAtIndex(index)
36 return random_card
37 }
38 }
时间： 2024-10-24 23:11:24