> On 4 Oct 2015, at 13:48, Rick Mann <[email protected]> wrote: > > Why won't this compile? > > let devices = AVCaptureDevice.devices() // OKAY > for device in devices > { > print("Device: \(device)") > > for f in device.formats // no member "Generator" > { > print(" format: \(f)") > } > } > > Each of the loops' collections is of type [AnyObject]! But for the > device.formats, I get > > AppDelegate.swift:25:13: Value of type '[AnyObject]!' has no member > 'Generator' > > Also, command-clicking on device() takes me to a Swift interface file. > Command-clicking on formats takes me to an Objective-C header. > > If I put a ! after device.formats, it compiles. > > -- > Rick Mann > [email protected] >
Apply the usual swift technique and break it down into more than one line then go look at the types of each variable. let ff = device.formats let pp = ff! option-click on each of those variables and you’ll quickly see the ‘!!’ on the first one and hence why you have to explicitly unwrap it to get it into a [AnyObject] which has a generator. _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
