SWIFT Tuple pattern and struct pattern

Define a tuple

Let color = (1.0,1.0,1.0,1.0)

Switch color{

Case (0.0,0.5...1.0,let blue,_)://Match the first value is 0.0 the second value is 0.5 to 1.0 the 34th value is arbitrary, and the third value is passed to the blue variable

println ("Blue Is \ (blue)")

Case let (r,g,b,1.0) where r = = g && g = = B://Additional conditions where this one is also the value is equal

println ("Opaque grey \ (r * 100)%")

Default

println ("Unkonw")

}

Ganso is done, then define a struct.

struct Color {

var red:double?

var green:double?

var blue:double?

var alpha:double?

Init (red:double,green:double,blue:double,alpha:double) {

self.red = Red

Self.green = Green

Self.blue = Blue

Self.alpha = Alpha

}

}

var mycolor = Color (Red:10, green:20, blue:60, alpha:1.0)

Switch mycolor{

Case let a where a.red = = && A.blue = = 60:

println ("yes")

Default

println ("Unkonw")

}

SWIFT Tuple pattern and struct pattern