blob: 282baffc58fb6239356d0a78eee800bd0a10c898 (
plain)
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
|
@interface RootObject
+ (instancetype)alloc;
- (instancetype)init;
@end
@interface BaseClass : RootObject
+ (instancetype)sharedInstance;
- (instancetype)initWithFoo:(int)foo;
@end
static BaseClass *sharedInstance = (void *)0;
static int counter = 0;
@implementation BaseClass
+ (instancetype)sharedInstance {
if (sharedInstance) {
return sharedInstance;
}
sharedInstance = [[BaseClass alloc] initWithFoo:3];
return sharedInstance;
}
- (instancetype)initWithFoo:(int)foo {
self = [super init];
if (self) {
counter += foo;
}
return self;
}
@end
|
