iOS适配各版本

    if (isBeforeIOS7)
    {
        UIButton *yes = [UIButton buttonWithType:UIButtonTypeCustom];
        yes.frame = CGRectMake(0,0,40,40);
        [yes setTitle:@"确定" forState:UIControlStateNormal];
        [yes setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        yes.titleLabel.font=[UIFont systemFontOfSize:16];
        [yes addTarget: self action: @selector(selectItemReturn:) forControlEvents: UIControlEventTouchUpInside];
        UIBarButtonItem*right=[[UIBarButtonItem alloc]initWithCustomView:yes];
        self.navigationItem.rightBarButtonItem=right;
    }else
    {
        UIBarButtonItem *editlButton = [[UIBarButtonItem alloc] initWithTitle:@"确定" style:UIBarButtonItemStyleBordered target:self action:@selector(selectItemReturn:)];
        self.navigationItem.rightBarButtonItem = editlButton;
        self.navigationItem.rightBarButtonItem.enabled = YES;
    }

if (isAfterIOS8)
    {
        [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings
                                                                                 settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge)
                                                                                 categories:nil]];
        [[UIApplication sharedApplication] registerForRemoteNotifications];
    }
    else
    {
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
             (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
    }