swift switch介绍
switch与object-c不同的地方
switch形式如下:
switch some value to consider {
case value 1:
respond to value 1
case value 2,value 3:
respond to value 2 or 3
default:
otherwise,do something else
}
switch some value to consider {
case value 1:
respond to value 1
case value 2,value 3:
respond to value 2 or 3
default:
otherwise,do something else
}