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Start your free trialAllen Deckert
9,783 PointsNo Errors but Not Passing Challenge Build Simple iPhone App Swift 3
Not throwing any errors but I can't seem to find out what was wrong. Looked for previous answers to this question and assumed that the challenge is still bugged because of the single quotation mark. but putting \ didn't fix it.
class Point {
var x: Int
var y: Int
init(x: Int, y: Int){
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(direction: String) {
print("Do nothing! I\'m a machine!")
}
}
// Enter your code below
class Robot: Machine {
override func move(direction: String) {
switch direction {
case "Up": self.location.y += 1
case "Down": self.location.y -= 1
case "Left": self.location.x += 1
case "Right": self.location.x -= 1
default: break
}
}
}
2 Answers
Thomas Dobson
7,511 PointsHi Allen,
Xcode did not produce the error, but the Treehouse compiler did:
swift_lint.swift:32:19: error: argument names for method 'move(direction:)' do not match those of overridden method 'move' override func move(direction: String) {
looking closer at your code I see two mistakes (See comments):
class Point {
var x: Int
var y: Int
init(x: Int, y: Int){
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(direction: String) { //You removed the internal name omitance "_" before direction
print("Do nothing! I\'m a machine!")
}
}
// Enter your code below
class Robot: Machine {
override func move(direction: String) { //You removed the internal name omitance "_" before direction
switch direction {
case "Up": self.location.y += 1
case "Down": self.location.y -= 1
case "Left": self.location.x += 1 // Left is -=
case "Right": self.location.x -= 1 // Right is +=
default: break
}
}
}
The final code being:
class Point {
var x: Int
var y: Int
init(x: Int, y: Int){
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: String) {
print("Do nothing! I\'m a machine!")
}
}
// Enter your code below
class Robot: Machine {
override func move(_ direction: String) {
switch direction {
case "Up": self.location.y += 1
case "Down": self.location.y -= 1
case "Left": self.location.x -= 1
case "Right": self.location.x += 1
default: break
}
}
}
Your code compiled fine in Xcode... just not quite what the parameters of the exercise was expecting.
Allen Deckert
9,783 PointsThank you!