RPGで学ぶSwiftの値型 / Learning Value Types in Swift with RPG

Osaka Mix Leap Study #10 - try! Swift Tokyo Report

Transcript

1. RPGͰֶͿSwi'ͷ஋ܕ Yuta Koshizawa @koher
6. ม਺ let maxHP = 153 // ࠷େHP var hp = maxHP // ݱࡏHP
7. ԋࢉ // (߈ܸྗ - ๷ޚྗ) ÷ 2 ͰμϝʔδΛܭࢉ͢Δ৔߹ let damage = (character.attack - target.defense) / 2 print("\(character.name)ͷ͜͏͖͛ɻ") print("\(target.name)ʹ\(damage)ͷμϝʔδʂ")
8. ৚݅෼ذ hp += 80 // ࠷େHPΛ௒͑ͯճ෮͠ͳ͍Α͏ʹ͢Δ if hp > maxHP { hp = maxHP }
9. ഑ྻͱ܁Γฦ͠ // ΩϟϥΫλʔͷ഑ྻͰύʔςΟΛද͢ var party: [Character] = [...] // ϧʔϓͰύʔςΟͷΩϟϥΫλʔΛॱ൪ʹऔಘ for character in party { print(character.name) print("HP \(character.hp)") print("MP \(character.mp)") print() }
10. Α͋͘Δϓϩάϥϛϯάॳ৺ऀ޲͚ͷ՝୊ // 1͔Β100·Ͱͷ߹ܭΛٻΊͳ͍͞ var sum = 0 for n in 1...100 { sum += n } print(sum)
11. ۩ମྫͰֶ΅͏ʹ΋ྫΛཧղ͢Δͷ͕େม
13. RPGΛ୊ࡐʹϓϩάϥϛϯάΛֶͿ × ॳ৺ऀ
14. RPGΛ୊ࡐʹϓϩάϥϛϯάΛֶͿ × ܦݧऀ
16. Swi$ ͷҰ൪ͷಛ௃͸ԿͰ͔͢ʁ
17. ͨͱ͑͹ɺ஋ܕத৺ͷݴޠͰ͋Δ͜ͱ
18. Swi$ ඪ४ϥΠϒϥϦ͸΄΅͢΂ͯ஋ܕ struct Int { ... } struct Double { ... } struct Bool { ... } struct String { ... } struct Array<Element> { ... } struct Dictionary<Key, Value> { ... } enum Optional<Wrapped> { ... }
19. ࢀরܕͷίϨΫγϣϯʢ Python ʣ # Python a = [2, 3, 4] b = a a[2] = 5 print(a) # [2, 3, 5] print(b) # [2, 3, 5]
20. ஋ܕͷίϨΫγϣϯʢ Swi% ʣ // Swift var a = [2, 3, 4] var b = a a[2] = 5 print(a) // [2, 3, 5] print(b) // [2, 3, 4]
21. Swi$ ͷ஋ܕ × SWIFT QUEST
22. ஋ܕ͸↓ͷ͍͍ͱ͜ͲΓ ϛϡʔλϒϧΫϥε ΠϛϡʔλϒϧΫϥε
23. ϛϡʔλϒϧΫϥε class Character { let name: String // ໊લ var hp: Int // ̝̥ var mp: Int // ̢̥ let attack: Int // ߈ܸྗ let defense: Int // ๷ޚྗ ... }
24. ༐ऀ let hero = Character( name: "Ώ͏͠Ό", hp: 153, mp: 25, attack: 162, defense: 97 )
25. ϛϡʔλϒϧΫϥε let hero = Character(name: "Ώ͏͠Ό", ...) let archfiend = Character(name: "·͓͏", ...) print("\(archfiend.name)ͷ͜͏͖͛ɻ") let damage = (archfiend.attack - hero.defense) / 2 hero.hp -= damage print("\(hero.name)ʹ\(damage)ͷμϝʔδʂ")
26. ϛϡʔλϒϧΫϥε class Character { let name: String // ໊લ var hp: Int // ̝̥ var mp: Int // ̢̥ let attack: Int // ߈ܸྗ let defense: Int // ๷ޚྗ ... }
27. ΠϛϡʔλϒϧΫϥε class Character { let name: String // ໊લ let hp: Int // ̝̥ let mp: Int // ̢̥ let attack: Int // ߈ܸྗ let defense: Int // ๷ޚྗ ... }
28. ΠϛϡʔλϒϧΫϥε var hero = Character(name: "Ώ͏͠Ό", ...) var archfiend = Character(name: "·͓͏", ...) print("\(archfiend.name)ͷ͜͏͖͛ɻ") let damage = (archfiend.attack - hero.defense) / 2 hero = Character( name: hero.name, hp: hero.hp - damage, mp: hero.mp, attack: hero.attack, defense: hero.defense ) print("\(hero.name)ʹ\(damage)ͷμϝʔδʂ")
29. ΠϛϡʔλϒϧΫϥε class Character { let name: String // ໊લ let hp: Int // ̝̥ let mp: Int // ̢̥ let attack: Int // ߈ܸྗ let defense: Int // ๷ޚྗ ... }
30. ஋ܕʢ struct ʣ struct Character { let name: String // ໊લ var hp: Int // ̝̥ var mp: Int // ̢̥ let attack: Int // ߈ܸྗ let defense: Int // ๷ޚྗ ... }
31. ஋ܕʢ struct ʣ var hero = Character(name: "Ώ͏͠Ό", ...) var archfiend = Character(name: "·͓͏", ...) print("\(archfiend.name)ͷ͜͏͖͛ɻ") let damage = (archfiend.attack - hero.defense) / 2 hero.hp -= damage print("\(hero.name)ʹ\(damage)ͷμϝʔδʂ")
32. ϛϡʔλϒϧΫϥε func performAttack(by character: Character, to target: Character) { print("\(character.name)ͷ͜͏͖͛ɻ") let damage = (character.attack - target.defense) / 2 target.hp -= damage print("\(target.name)ʹ\(damage)ͷμϝʔδʂ") print() } performAttack(by: hero, to: archfiend) performAttack(by: archfiend, to: hero)
33. ΠϛϡʔλϒϧΫϥε // লུ
34. ஋ܕʢ struct ʣ func performAttack(by character: Character, to target: Character) -> Character { var target = target print("\(character.name)ͷ͜͏͖͛ɻ") let damage = (character.attack - target.defense) / 2 target.hp -= damage print("\(target.name)ʹ\(damage)ͷμϝʔδʂ") print() return target } archfiend = performAttack(by: hero, to: archfiend) hero = performAttack(by: archfiend, to: hero)
35. ஋ܕʢ struct ʣ func performAttack(by character: Character, to target: inout Character) { print("\(character.name)ͷ͜͏͖͛ɻ") let damage = (character.attack - target.defense) / 2 target.hp -= damage print("\(target.name)ʹ\(damage)ͷμϝʔδʂ") print() } performAttack(by: hero, to: &archfiend) performAttack(by: archfiend, to: &hero)
36. ϛϡʔλϒϧΫϥε func performAttack(by character: Character, to target: Character) { print("\(character.name)ͷ͜͏͖͛ɻ") let damage = (character.attack - target.defense) / 2 target.hp -= damage print("\(target.name)ʹ\(damage)ͷμϝʔδʂ") print() } performAttack(by: hero, to: archfiend) performAttack(by: archfiend, to: hero)
37. ϛϡʔλϒϧΫϥε class Party { let members: [Character] ... }
38. ϛϡʔλϒϧΫϥε let friendParty = Party(members: [...]) let enemyParty = Party(members: [...]) for character in friendParty.members { performAttack(by: character, to: any(of: enemyParty.members)!) // } for character in enemyParty.members { performAttack(by: character, to: any(of: friendParty.members)!) // }
39. ஋ܕʢ struct ʣ var friendParty = Party(members: [...]) var enemyParty = Party(members: [...]) for character in friendParty.members { performAttack(by: character, to: &any(of: enemyParty.members)!) // } for character in enemyParty.members { performAttack(by: character, to: &any(of: friendParty.members)!) // }
40. ॓୊ ஋ܕͰεϚʔτʹॻ͘ʹ͸Ͳ͏͢Ε͹Α͍Ͱ͠ΐ͏ʁ // ϛϡʔλϒϧΫϥε performAttack(by: character, to: any(of: friendParty.members)!) // // ஋ܕʢ struct ʣ performAttack(by: character, to: &any(of: enemyParty.members)!) // h"ps:/ /git.io/vx7jW