Objective-c 创建单例

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface Singleton : NSObject

/*
* 创建单例
*/
+ (Singleton *) shareManager;

@end

#import "Singleton.h"

@implementation Singleton

+ (Singleton *)shareManager{
static Singleton *_Singleton;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_Singleton = [[Singleton alloc]init];
});
return _Singleton;
}

@end