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| 1 | +// |
| 2 | +// TriggleButtonNode.swift |
| 3 | +// ios-spritekit-flappy-flying-bird |
| 4 | +// |
| 5 | +// Created by Astemir Eleev on 08/10/2018. |
| 6 | +// Copyright © 2018 Astemir Eleev. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import SpriteKit |
| 10 | + |
| 11 | +/// A type that can respond to `TriggleButtonNode` button press events. |
| 12 | +protocol TriggleButtonNodeResponderType: class { |
| 13 | + /// Responds to a button press. |
| 14 | + func triggleButtonTriggered(triggle: TriggleButtonNode) |
| 15 | +} |
| 16 | + |
| 17 | +class TriggleButtonNode: ButtonNode { |
| 18 | + |
| 19 | + // MARK: - Custom types |
| 20 | + |
| 21 | + enum TriggleState { |
| 22 | + case off |
| 23 | + case switched |
| 24 | + case on |
| 25 | + |
| 26 | + static func convert(from difficultyLevel: Difficulty) -> TriggleState { |
| 27 | + switch difficultyLevel { |
| 28 | + case .easy: |
| 29 | + return .off |
| 30 | + case .medium: |
| 31 | + return .switched |
| 32 | + case .hard: |
| 33 | + return .on |
| 34 | + } |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + struct Triggle { |
| 39 | + |
| 40 | + // MARK: - Properties |
| 41 | + |
| 42 | + private(set) var off: Bool |
| 43 | + private(set) var switched: Bool |
| 44 | + private(set) var on: Bool |
| 45 | + private var lastTriggleState: TriggleState |
| 46 | + |
| 47 | + // MARK: - Initializers |
| 48 | + |
| 49 | + init(state: TriggleState) { |
| 50 | + switch state { |
| 51 | + case .off: |
| 52 | + off = true |
| 53 | + switched = false |
| 54 | + on = false |
| 55 | + lastTriggleState = .off |
| 56 | + case .switched: |
| 57 | + off = false |
| 58 | + switched = true |
| 59 | + on = false |
| 60 | + lastTriggleState = .switched |
| 61 | + case .on: |
| 62 | + off = false |
| 63 | + switched = false |
| 64 | + on = true |
| 65 | + lastTriggleState = .on |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + // MARK: - Methods |
| 70 | + |
| 71 | + mutating func switchState() { |
| 72 | + if off { |
| 73 | + off = !off |
| 74 | + switched = !switched |
| 75 | + lastTriggleState = .switched |
| 76 | + } else if switched { |
| 77 | + switched = !switched |
| 78 | + on = !on |
| 79 | + lastTriggleState = .on |
| 80 | + } else if on { |
| 81 | + on = !on |
| 82 | + off = !off |
| 83 | + lastTriggleState = .off |
| 84 | + } |
| 85 | + } |
| 86 | + |
| 87 | + func state() -> TriggleState { |
| 88 | + return lastTriggleState |
| 89 | + } |
| 90 | + |
| 91 | + func toDifficultyLevel() -> Difficulty { |
| 92 | + switch lastTriggleState { |
| 93 | + case .off: |
| 94 | + return Difficulty.easy |
| 95 | + case .switched: |
| 96 | + return Difficulty.medium |
| 97 | + case .on: |
| 98 | + return Difficulty.hard |
| 99 | + } |
| 100 | + } |
| 101 | + |
| 102 | + } |
| 103 | + |
| 104 | + // MARK: - Properties |
| 105 | + |
| 106 | + var triggle: Triggle { |
| 107 | + didSet { |
| 108 | + guard let off = state.off, let switched = state.switched, let on = state.on else { |
| 109 | + return |
| 110 | + } |
| 111 | + on.isHidden = !triggle.on |
| 112 | + off.isHidden = !triggle.off |
| 113 | + switched.isHidden = !triggle.switched |
| 114 | + |
| 115 | + if isUserInteractionEnabled { |
| 116 | + triggleResponder.triggleButtonTriggered(triggle: self) |
| 117 | + } |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + private var state: (off: SKLabelNode?, switched: SKLabelNode?, on: SKLabelNode?) = (off: nil, switched: nil, on: nil) |
| 122 | + |
| 123 | + var triggleResponder: TriggleButtonNodeResponderType { |
| 124 | + guard let responder = scene as? TriggleButtonNodeResponderType else { |
| 125 | + fatalError("ButtonNode may only be used within a `ButtonNodeResponderType` scene.") |
| 126 | + } |
| 127 | + return responder |
| 128 | + } |
| 129 | + |
| 130 | + |
| 131 | + // MARK: - Initialisers |
| 132 | + |
| 133 | + required init?(coder aDecoder: NSCoder) { |
| 134 | + let difficultyLevel = UserDefaults.standard.getDifficultyLevel() |
| 135 | + triggle = .init(state: TriggleState.convert(from: difficultyLevel)) |
| 136 | + |
| 137 | + super.init(coder: aDecoder) |
| 138 | + |
| 139 | + guard let offState = childNode(withName: "Easy") as? SKLabelNode else { |
| 140 | + fatalError("Could not find SKLabel node") |
| 141 | + } |
| 142 | + state.off = offState |
| 143 | + |
| 144 | + guard let switchedState = childNode(withName: "Medium") as? SKLabelNode else { |
| 145 | + fatalError("Could not find SKLabel node") |
| 146 | + } |
| 147 | + state.switched = switchedState |
| 148 | + |
| 149 | + guard let onState = childNode(withName: "Hard") as? SKLabelNode else { |
| 150 | + fatalError("Could not find SKLabel node") |
| 151 | + } |
| 152 | + state.on = onState |
| 153 | + |
| 154 | + } |
| 155 | + |
| 156 | + // MARK: - Methods |
| 157 | + |
| 158 | + override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { |
| 159 | + super.touchesBegan(touches, with: event) |
| 160 | + triggle.switchState() |
| 161 | + } |
| 162 | +} |
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