How to translate this enum from objective-c to swift? -

i don't understand why & , << don't work in swift. please me translate objective-c code examples swift.

example 1

uiviewcontroller *viewcontroller = [[uiviewcontroller alloc] init]; viewcontroller.edgesforextendedlayout = uirectedgebottom | uirectedgetop; if (viewcontroller.edgesforextendedlayout & uirectedgebottom) {     nslog(@"got it!"); } 

i'am trying translate in swift got error

let viewcontroller = uiviewcontroller() viewcontroller.edgesforextendedlayout = .bottom | .top if viewcontroller.edgesforextendedlayout & .bottom {     println("got it!") } 

example 2

typedef ns_options(nsinteger, kviewcontrolleranchoredgesture) {     kviewcontrolleranchoredgesturenone     = 0,     kviewcontrolleranchoredgesturepanning  = 1 << 0,     kviewcontrolleranchoredgesturetapping  = 1 << 1,     kviewcontrolleranchoredgesturecustom   = 1 << 2,     kviewcontrolleranchoredgesturedisabled = 1 << 3 }; 

here can't understand why << doesn't compile, how can fix it?

enum kviewcontrolleranchoredgesture: nsinteger {     case none     = 0     case panning  = 1 << 0     case tapping  = 1 << 1     case custom   = 1 << 2     case disabled = 1 << 3 } 

thanks in advance!

first:

let viewcontroller = uiviewcontroller() viewcontroller.edgesforextendedlayout = .bottom | .top if viewcontroller.edgesforextendedlayout & .bottom == .bottom {     println("got it!") } 

second:

in swift rawoptionsettype used instead of ns_options. there no official guide find, here nice article: http://nshipster.com/rawoptionsettype/