Swift blocks not working
It has something to do with how Swift implement closure. You need to use @convention(block)
to annotate that the closure is ObjC block. Use unsafeBitCast
to force cast it
var block : @convention(block) (NSString!) -> Void = {
(string : NSString!) -> Void in
println("test")
}
ctx.setObject(unsafeBitCast(block, AnyObject.self), forKeyedSubscript: "test")
from REPL
swift
Welcome to Swift! Type :help for assistance.
1> import Foundation
2> var block : @convention(block)(NSString!) -> Void = {(string : NSString!) -> Void in println("test")}
block: @convention(block)(NSString!) -> Void =
3> var obj: AnyObject = reinterpretCast(block) as AnyObject
obj: __NSMallocBlock__ = {} // familiar block type