I'm overriding supportedInterfaceOrientations in my view controller because I
want it to return Portrait + PortraitUpsideDown, and on iPhone
PortraitUpsideDown is not included in the standard return.
The Objective-C method would look something like this
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait |
UIInterfaceOrientationMaskPortraitUpsideDown;
}
Swift has stubbed out the method thus
override func supportedInterfaceOrientations() -> Int
{
}
which makes some sense. I'm tripping over myself trying however to return the
correct Int without casting my casts to casts of casts.
UIInterfaceOrientationMask is a struct with a number of Type properties, so you
can write
UIInterfaceOrientationMask.Portrait
to get its value however that's a struct so you need to ask for the 'value'
property, which is defined to return a UInt and seems to do the same as
toRaw(). Trying to return UIInterfaceOrientationMask.Portrait.value however
gives the error
'NSNumber is not a subtype of Int'
Odd as I thought UInt was a basic type like Int, but clearly it's an NSNumber.
A bit of luck with autocompletion threw up the asSigned() method, which seems
to do the same as constructing an Int using Int( .. )
That appears to work but the final line is now
return UIInterfaceOrientationMask.Portrait.value.asSigned() +
UIInterfaceOrientationMask.PortraitUpsideDown.value.asSigned()
Surely there's something a little less unwieldy, anyone have something? Or is
this just a case where Swift's strong typing meets Cocoa's C background and
ends up in knots?
Roland
PS in the course of trying things out I tried various ways of initializing a
UInt and failed dismally often with evil stack traces in the console.
var a : Int = 123
var b : UInt = 123 // fail
var c : UInt = a // fail
var d : UInt = UInt( a ) // fail
how do you even make one of these things?
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