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iOS Development Techdegree Student 1,596 Pointswhats wrong with this?
whats missing?
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
enum Direction {
case left
case right
case up
case down
}
class Robot {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: Direction) {
// Enter your code below
switch Direction {
case Direction.up:
return location.y += 1
case Direction.down :
return location.y -= 1
case Direction.right:
return location.x += 1
case Direction.left:
return location.x -= 1
}
}
}
1 Answer
Sahil Gangele
6,851 PointsSimple mistake:
When you create a switch case, you have to switch off of some variable that is of type Enum
. This variable will contain ONE of the possible cases in the switch case. Then you go throughout the process of the switch case, and you perform some action for each case.
Looks like you put in an enum type Direction
into the switch case. Well, this is an enum type, it doesn't contain a case. You have to pass in direction
to the switch statement instead. This contains a case, as it's the parameter passed in the function.