在Swift中,可以使用以下方法在两个枚举之间进行切换:
enum Direction {
case north
case south
case east
case west
}
var currentDirection: Direction = .north
// 切换到另一个方向
if currentDirection == .north {
currentDirection = .south
} else if currentDirection == .south {
currentDirection = .east
} else if currentDirection == .east {
currentDirection = .west
} else {
currentDirection = .north
}
enum Direction: String {
case north = "North"
case south = "South"
case east = "East"
case west = "West"
}
var currentDirection: Direction = .north
// 使用原始值进行切换
if let rawValue = currentDirection.rawValue {
if rawValue == "North" {
currentDirection = .south
} else if rawValue == "South" {
currentDirection = .east
} else if rawValue == "East" {
currentDirection = .west
} else {
currentDirection = .north
}
}
enum Direction {
case north(speed: Int)
case south(speed: Int)
case east(speed: Int)
case west(speed: Int)
}
var currentDirection: Direction = .north(speed: 10)
// 切换到另一个方向
switch currentDirection {
case .north(let speed):
currentDirection = .south(speed: speed)
case .south(let speed):
currentDirection = .east(speed: speed)
case .east(let speed):
currentDirection = .west(speed: speed)
case .west(let speed):
currentDirection = .north(speed: speed)
}
以上是在Swift中切换两个枚举之间的方法。根据具体的需求和枚举定义,可以选择适合的方法来实现枚举的切换操作。
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