Skip to content

Instantly share code, notes, and snippets.

@DanielKoehler

DanielKoehler/Apple's strict singleton implementation

Created January 30, 2014 21:25
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save DanielKoehler/8720193 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save DanielKoehler/8720193 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
Apple's strict singleton implementation
+ (instancetype)singleton {
static id singletonInstance = nil;
if (!singletonInstance) {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
singletonInstance = [[super allocWithZone:NULL] init];
});
}
return singletonInstance;
}
+ (id)allocWithZone:(NSZone *)zone {
return [self singleton];
}
- (id)copyWithZone:(NSZone *)zone {
return self;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment