In Swift you can check the class type of an object using 'is'. How can I incorporate this into a 'switch' block?
I think it's not possible, so I'm wondering what is the best way around this.
You absolutely can use is
in a switch
block. See "Type Casting for Any and AnyObject" in the Swift Programming Language (though it's not limited to Any
of course). They have an extensive example:
for thing in things {
switch thing {
case 0 as Int:
println("zero as an Int")
case 0 as Double:
println("zero as a Double")
case let someInt as Int:
println("an integer value of \(someInt)")
case let someDouble as Double where someDouble > 0:
println("a positive double value of \(someDouble)")
// here it comes:
case is Double:
println("some other double value that I don't want to print")
case let someString as String:
println("a string value of \"\(someString)\"")
case let (x, y) as (Double, Double):
println("an (x, y) point at \(x), \(y)")
case let movie as Movie:
println("a movie called '\(movie.name)', dir. \(movie.director)")
default:
println("something else")
}
}