Support for Objective-C blocks

[faxioman]

Support for Objective-C blocks would be great...
So we could use methods like animateWithDuration:animations:

Bye!

[iamdaiyuan]

agree，should support for blocks

[mysteriouss]

I was just wondering how to invoke the 'NSGlobalBlock' if I make it through from Objc to Lua as a parameter. Help!

[probablycorey]

I'm not actively maintaining Wax anymore, so I'm not sure if that is possible. But I have a hunch that it is.

[mysteriouss]

void *wax_copyToObjc(lua_State *L, const char *typeDescription, int stackIndex, int *outsize)
there is a prob. about this function, I think, that stops the NSStackBlock from copying from Lua to Objc.
So I gave up passing blocks into Lua and made a class named 'NSBlockInvacation'.
@interface NSBlockInvocation : NSObject
@Property (nonatomic,copy) void(^block)();
+(NSBlockInvocation *)invocationWithBlock:(void(^)())ablock;
-(void)invoke;
-(void)invoke:(id)anObject;
-(void)invoke:(id)anObject :(id)anotherObject;
@EnD
@implementation NSBlockInvocation
+(NSBlockInvocation *)invocationWithBlock:(void(^)())ablock{
NSBlockInvocation * invo = [[[NSBlockInvocation alloc] init] autorelease];
[invo setBlock:ablock];
return invo;
}
-(void)invoke{
self.block();
}
-(void)invoke:(id)anObject{
self.block(anObject);
}
-(void)invoke:(id)anObject :(id)anotherObject{
self.block(anObject,anotherObject);
}
-(void)dealloc{
[_block release];
[super dealloc];
}
//immobSDK.h
@protocol immobSDK
@optional
+(void)getScore:(NSString *)adunitID :(NSDictionary *)info :(NSBlockInvocation *)handler;
@EnD
@interface immobSDK ()
+(void)getScore:(NSString *)adunitID
accountInfo:(NSDictionary *)info
completionHandler:(void (^)(id result)) handler;
@EnD

//immobSDK.m
@implementation immobSDK
+(void)getScore:(NSString *)adunitID
accountInfo:(NSDictionary *)info
completionHandler:(void (^)(id result)) handler{
if ([self instancesRespondToSelector:@selector(getScore:::)]) {
[self getScore:adunitID:info:[NSBlockInvocation invocationWithBlock:handler]];
}
}
@EnD
--immobSDK.lua
function immobSDK:getScore__(adu,aid,handler)
url = self:QUERYSCORE(adu,aid)
wax.http.request{url, format = "json",callback = function(body,response)
--puts(url)
--puts(body)
if response == nil or body == nil then
handler:invoke(nil)
return
end
if response:statusCode() == 200 then
handler:invoke(body) end
end}
end

_older__no use__see above*_***************************
This is my stupid way for Objc to call the method declared in the Lua code.

typedef void(^completionHandler)(id); //only used for this kind of NSGlobalBlock
int wax_call(id aObserver, SEL aSelector, const char *aName, id aObject,completionHandler handler);

int wax_call(id aObserver, SEL aSelector, const char *aName,id aObject, completionHandler handler){

if ([aObserver respondsToSelector:aSelector]) {
    NSString * name = [NSString stringWithUTF8String:aName];
    [[NSNotificationCenter defaultCenter] addObserver:aObserver selector:aSelector name:name object:nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:name object:aObject];
    [[NSNotificationCenter defaultCenter] removeObserver:aObserver name:name object:nil];
    if (handler) {
        __block id observer = [[NSNotificationCenter defaultCenter] addObserverForName:name object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
            handler([note object]);
            [[NSNotificationCenter defaultCenter] removeObserver:observer name:name object:nil];
        }];
    }
    return 1;
}
return 0;

}

And the Lua code should post the notification to return.
NSNotificationCenter:defaultCenter() :postNotificationName_object(notification:name(),aObjct);

e.g.

[immobSDK getScore:@"123456" :^(id score) {
NSLog(@"%@",score);
}];

@interface immobSDK : NSObject

+(void)getScore:(NSString *)adunitID :(void (^)(id score)) handler;

@EnD

@implementation immobSDK
+(void)initialize{
wax_start("immobSDK.lua",luaopen_wax_http,nil);
}

+(void)getScore:(NSString *)adunitID :(void (^)(id score)) handler{
wax_call(self, @selector(Score:),FUNCTION,adunitID,handler);
}
@EnD

immobSDK.lua

function immobSDK:Score(adunitID)
--puts(adunitID:object())
wax.http.request{"http://www.google.com", callback = function(body,response)
if response:statusCode() == 200 then
NSNotificationCenter:defaultCenter()
:postNotificationName_object(adunitID:name(),200);
end
end}
end

Better ideas? Thank U

I've tried the NSStackBlock,and it cannnot be forced to NSGlobalBlock,otherwise there will be a crash.