/
MultiDelegate.m
60 lines (49 loc) · 1.18 KB
/
MultiDelegate.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
//
// MultiDelegate.m
// iNfrared
//
// Created by George Dean on 1/19/09.
// Copyright 2009 Perceptive Development. All rights reserved.
//
#import "MultiDelegate.h"
#import <objc/runtime.h>
@implementation MultiDelegate
- (id) initWithProtocol:(Protocol*)p
{
if(self = [super init])
{
proto = p;
}
return self;
}
- (void) addDelegate:(id)delegate
{
if(!delegateSet)
delegateSet = [[NSMutableSet alloc] init];
[delegateSet addObject:delegate];
}
- (NSMethodSignature*) methodSignatureForSelector:(SEL)selector
{
if([delegateSet count])
return [[delegateSet anyObject] methodSignatureForSelector:selector];
if(proto)
{
struct objc_method_description desc = protocol_getMethodDescription(proto, selector, YES, YES);
return [NSMethodSignature signatureWithObjCTypes:desc.types];
}
// return void-void signature by default
return [self methodSignatureForSelector:@selector(dealloc)];
}
- (void) forwardInvocation:(NSInvocation*)invocation
{
if(delegateSet) for (id delegate in delegateSet) {
if([delegate respondsToSelector:[invocation selector]])
[invocation invokeWithTarget:delegate];
}
}
- (void) dealloc
{
[delegateSet release];
[super dealloc];
}
@end