iOS单例的创建与销毁

#import "WSFAPPRouteManager.h"

@implementation WSFAPPRouteManager

static WSFAPPRouteManager *shareManager;
static dispatch_once_t onceToken = 0;

+ (instancetype)shareManager
{
    dispatch_once(&onceToken, ^{
        shareManager = [[WSFAPPRouteManager alloc] init];
    });
    return shareManager;
}

+ (instancetype)allocWithZone:(struct _NSZone *)zone
{
    if (!shareManager) {
        shareManager = [super allocWithZone:zone];
    }
    return shareManager;
}

+ (void)deallocManager
{
    shareManager = nil;
    onceToken = 0;
}

- (id)copyWithZone:(NSZone *)zone
{
    return shareManager;
}

- (id)copy
{
    return shareManager;
}

@end