A neat little trick I've just been shown when implementing a singleton within Obj-c/ Xcode. We can forget about the sharedInstance method and simply call the singleton by [UsersSettingsInstance method:parameters].
.h Header File
#import <Foundation/Foundation.h>
#define UsersSettingsInstance ((UsersSettingsModel *)[UsersSettingsModel sharedInstance])
@protocol UsersSettingsModelDelegate
@end
@interface UsersSettingsModel : NSObject
{
id delegate;
}
@property id delegate;
+ (UsersSettingsModel *)sharedInstance;
@end
.m Implementation File
#import "UsersSettingsModel.h"
@implementation UsersSettingsModel
static UsersSettingsModel * _sharedInstance = nil;
+ (UsersSettingsModel*)sharedInstance
{
static dispatch_once_t once;
dispatch_once(&once, ^ {
_sharedInstance = [[UsersSettingsModel alloc] init];
});
return _sharedInstance;
}
@end
Published by: nick in Code Sample, IOS/ XCode, Objective-C