我有一个 Coffeescript 类，我想调用 jQuery 函数，但它们似乎无法访问 DOM。
我的代码是这样的：
$(document).ready ->
$("#start-button").on "click", ->
game = new Gameplay()
game.playInning()
class @Gameplay
... most omitted
# display
displayAddBall: (balls) ->
$("#gameplay-at-bat-ball-indicator#{balls}").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-ball-indicator#{balls}").addClass("glyphicon glyphicon-check")
displayAddStrike: (strikes) ->
$("#gameplay-at-bat-strike-indicator#{strikes}").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-strike-indicator#{strikes}").addClass("glyphicon glyphicon-check")
如果我在 中调用这些函数document(ready)，就像gameplay.displayAddBall它工作正常一样，但是当我在类中调用相同的函数时，它不起作用并且没有给出错误。我的想法是它需要对 DOM 的引用，并且在类中没有它。我需要通过它，但我不确定它的机制。
这是完整的代码（我试图包含已编译的 JS 代码，但它太大了）：
$(document).ready ->
$("#start-button").on "click", ->
game = new Gameplay()
game.playInning()
class @Gameplay
PITCH_BALL_PROB = 50
PITCH_STRIKE_PROB = 35
PITCH_CONTACT_PROB = 100 - PITCH_BALL_PROB - PITCH_STRIKE_PROB
PITCH_BALL_RANGE = [0, PITCH_BALL_PROB]
PITCH_STRIKE_RANGE = [(PITCH_BALL_PROB) + 1, PITCH_BALL_PROB + PITCH_STRIKE_PROB]
PITCH_CONTACT_RANGE = [(PITCH_BALL_PROB + PITCH_STRIKE_PROB) + 1, 100]
CONTACT_FOUL_PROB = 35
CONTACT_SINGLE_PROB = 15
CONTACT_DOUBLE_PROB = 5
CONTACT_TRIPLE_PROB = 1
CONTACT_HOME_RUN_PROB = 4
CONTACT_POP_FLY_OUT_PROB = 20
CONTACT_GROUND_BALL_OUT_PROB = 20
CONTACT_FOUL_RANGE = [0, CONTACT_FOUL_PROB]
CONTACT_SINGLE_RANGE = [CONTACT_FOUL_PROB + 1, CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB]
CONTACT_DOUBLE_RANGE = [CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + 1, CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB]
CONTACT_TRIPLE_RANGE = [CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + 1, CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB]
CONTACT_HOME_RUN_RANGE = [CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB + 1, CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB + CONTACT_HOME_RUN_PROB]
CONTACT_POP_FLY_OUT_RANGE = [CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB + CONTACT_HOME_RUN_PROB, CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB + CONTACT_HOME_RUN_PROB + CONTACT_POP_FLY_OUT_PROB]
CONTACT_GROUND_BALL_OUT_RANGE = [CONTACT_FOUL_PROB + CONTACT_SINGLE_PROB + CONTACT_DOUBLE_PROB + CONTACT_TRIPLE_PROB + CONTACT_HOME_RUN_PROB + CONTACT_POP_FLY_OUT_PROB + 1, 100]
# Pitch Results
pitch: ->
Math.floor (Math.random() * 100) + 1
pitchResult: (pitch) ->
if @inBallRange(pitch) then return "ball"
if @inStrikeRange(pitch) then return "strike"
if @inContactRange(pitch) then return "contact"
inBallRange: (pitch) ->
pitch > PITCH_BALL_RANGE[0] && pitch <= PITCH_BALL_RANGE[1]
inStrikeRange: (pitch) ->
pitch > PITCH_STRIKE_RANGE[0] && pitch <= PITCH_STRIKE_RANGE[1]
inContactRange: (pitch) ->
pitch > PITCH_CONTACT_RANGE[0] && pitch <= PITCH_CONTACT_RANGE[1]
# Contact results
contact: ->
Math.floor (Math.random() * 100) + 1
contactResult: (contact) ->
if @inFoulRange(contact) then return "foul"
if @inSingleRange(contact) then return "single"
if @inDoubleRange(contact) then return "double"
if @inTripleRange(contact) then return "triple"
if @inHomeRunRange(contact) then return "home run"
if @inPopFlyOutRange(contact) then return "pop fly out"
if @inGroundBallOutRange(contact) then return "ground ball out"
inFoulRange: (contact) ->
contact >= CONTACT_FOUL_RANGE[0] && contact <= CONTACT_FOUL_RANGE[1]
inSingleRange: (contact) ->
contact >= CONTACT_SINGLE_RANGE[0] && contact <= CONTACT_SINGLE_RANGE[1]
inDoubleRange: (contact) ->
contact >= CONTACT_DOUBLE_RANGE[0] && contact <= CONTACT_DOUBLE_RANGE[1]
inTripleRange: (contact) ->
contact >= CONTACT_TRIPLE_RANGE[0] && contact <= CONTACT_TRIPLE_RANGE[1]
inHomeRunRange: (contact) ->
contact >= CONTACT_HOME_RUN_RANGE[0] && contact <= CONTACT_HOME_RUN_RANGE[1]
inPopFlyOutRange: (contact) ->
contact >= CONTACT_POP_FLY_OUT_RANGE[0] && contact <= CONTACT_POP_FLY_OUT_RANGE[1]
inGroundBallOutRange: (contact) ->
contact >= CONTACT_GROUND_BALL_OUT_RANGE[0] && contact <= CONTACT_GROUND_BALL_OUT_RANGE[1]
# At-bat
atbat: ->
balls = 0
strikes = 0
contact = null
atbat = true
while atbat
result = @pitchResult(@pitch())
@displayAddGameReport("@atbat: Pitch Result -> result = #{result}")
switch result
when "ball" then balls = @ballReceived(balls)
when "strike" then strikes = @strikeReceived(contact, strikes)
when "contact" then contact = @contactReceived()
if balls is 4
result = "walk"
@displayAddGameReport("Walk")
atbat = false
if strikes is 3
result = "strikeout"
atbat = false
if contact is "foul"
strikes = @strikeReceived(contact, strikes)
if contact? and contact isnt "foul"
result = contact
atbat = false
contact = null
@displayAddGameReport("@atbat: balls = #{balls}, strikes = #{strikes}, contact = #{contact}")
return result
atBatResult: (result, score, baseOccupancy) ->
switch result
when "strikeout" then @displayAddGameReport("StrikeOut")
when "pop fly out" then @displayAddGameReport("Pop fly out")
when "ground ball out" then @displayAddGameReport("Ground ball out")
else
score = @updateBaseOccupancy(baseOccupancy, result, score)
return { result: result, score: score }
ballReceived: (balls) ->
@displayAddBall(balls + 1)
return balls + 1
strikeReceived: (contact, strikes) ->
if contact is "foul" and strikes is 2
return strikes
@displayAddStrike(strikes + 1)
return strikes + 1
contactReceived: ->
result = @contactResult(@contact())
@displayAddGameReport(result) #unless result is "foul"
return result
updateBaseOccupancy: (baseOccupancy, result, score) ->
if result is "walk"
if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
if result is "single"
if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "manned"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
if result is "double"
if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "empty"
baseOccupancy.second = "manned"
baseOccupancy.third = "empty"
if result is "triple"
if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 3
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "manned"
if result is "home run"
if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 4
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
score += 3
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "manned"
score += 3
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 3
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "manned"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "manned" and baseOccupancy.third is "empty"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "manned" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
score += 2
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
else if baseOccupancy.first is "empty" and baseOccupancy.second is "empty" and baseOccupancy.third is "empty"
score += 1
baseOccupancy.first = "empty"
baseOccupancy.second = "empty"
baseOccupancy.third = "empty"
return score
# play inning
playInning: ->
outs = 0
score = 0
baseOccupancy = { first: "empty", second: "empty", third: "empty" }
@displayAddGameReport("First Inning")
while outs < 1
result = @atbat()
battingResult = @atBatResult(result, score, baseOccupancy)
if battingResult.result is "strikeout" or battingResult.result is "pop fly out" or battingResult.result is "ground ball out"
outs += 1
@displayAddGameReport("@playInning: outs = #{outs}, score = #{battingResult.score}, bases = #{JSON.stringify(baseOccupancy)}")
@displayUpdateScore(battingResult.score)
@displayClearBalls()
@displayClearStrikes()
# display
displayAddBall: (balls) ->
console.log("#gameplay-at-bat-ball-indicator#{balls}")
$("#gameplay-at-bat-ball-indicator#{balls}").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-ball-indicator#{balls}").addClass("glyphicon glyphicon-check")
displayAddStrike: (strikes) ->
console.log("#gameplay-at-bat-strike-indicator#{strikes}")
$("#gameplay-at-bat-strike-indicator#{strikes}").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-strike-indicator#{strikes}").addClass("glyphicon glyphicon-check")
displayAddOut: ->
if $("#gameplay-at-bat-out-indicator1").hasClass("glyphicon-check")
$("#gameplay-at-bat-out-indicator1").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-out-indicator1").addClass("glyphicon glyphicon-check")
else
$("#gameplay-at-bat-out-indicator2").removeClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-out-indicator2").addClass("glyphicon glyphicon-check")
displayClearBalls: ->
$("#gameplay-at-bat-ball-indicator1").removeClass("glyphicon glyphicon-check")
$("#gameplay-at-bat-ball-indicator2").removeClass("glyphicon glyphicon-check")
$("#gameplay-at-bat-ball-indicator3").removeClass("glyphicon glyphicon-check")
$("#gameplay-at-bat-ball-indicator1").addClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-ball-indicator2").addClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-ball-indicator3").addClass("glyphicon glyphicon-unchecked")
displayClearStrikes: ->
$("#gameplay-at-bat-strike-indicator1").removeClass("glyphicon glyphicon-check")
$("#gameplay-at-bat-strike-indicator2").removeClass("glyphicon glyphicon-check")
$("#gameplay-at-bat-strike-indicator1").addClass("glyphicon glyphicon-unchecked")
$("#gameplay-at-bat-strike-indicator2").addClass("glyphicon glyphicon-unchecked")
displayAddGameReport: (report) ->
$("#gameplay-game-report").append(report + "<br>")
displayUpdateScore: (score) ->
$("#gameplay-scoreboard-top-inning-1").text(score)