Issue in declaring an objective-C method in Swift

Question

I am trying to use FCOfflineQueue (a persistent framework for queuing network requests while offline) with my iOS app written in Swift. I am supposed to subclass the FCOfflineQueue class and override the following method in my subclass-

- (BOOL)executeOperation:(int64_t)opcode userInfo:(NSDictionary *)userInfo;

In my own queue that I subclassed from FCOfflineQueue , am having trouble declaring this in Swift. I am doing the following-

override func executeOperation(opcode: Int64, userInfo: NSDictionary) -> Bool

It says- this method does not override any method from its superclass.

If instead I do the following-

@objc override func executeOperation(opcode: Int64, userInfo: NSDictionary) -> Bool

It says- Overriding method with selector 'executeOperation:userInfo:' has incompatible type '(Int64, NSDictionary) -> Bool'

I thought int64_t is equivalent to Int64 in Swift. Is it something to do with the conversion?

Any help is appreciated.

Answer 1

try to override like this:

override func executeOperation(opcode: Int64, userInfo: [NSObject : AnyObject]!) -> Bool {
    return false
}

When you bridge from an NSDictionary object with parameterized types to a Swift dictionary, the resulting dictionary is of type [ObjectType]. If an NSDictionary object does not specify parameterized types, it is bridged to a Swift dictionary of type [NSObject: AnyObject].

https://developer.apple.com/library/mac/documentation/Swift/Conceptual/BuildingCocoaApps/WorkingWithCocoaDataTypes.html