Question

我正在使用objective-c中的滑出菜单栏。我使用了这个链接https://github.com/arturdev/AMSlideMenu中的一些类。我做了左菜单。现在我遇到的问题是左侧菜单中的项目是Home，AboutUs，Login / Register和Contact。如果用户登录该项登录/注册应该更改为注销并在主页上方，它们应该出现用户配置文件或用户的单元格，直到它保持登录状态。如果用户按下注销项目，则应该注销并将我们带到主屏幕。有谁能够帮我？我从Web服务登录用户数据。左侧菜单栏项目是在静态单元格中生成的。

Answer 1

在左侧菜单中，您应该编写一个函数，根据用户状态（登录/注销）和注销菜单重新加载表视图为表视图准备数据源。

例如，一个给你一个想法的伪代码：

var dataSource: [CustomMenuItemObject] = []
func prepareDataSource()
{
    dataSource = []
    if(MySessionManager.current.isUserLoggedIn())
    {
         dataSource.append (createMyProfileMenu())
         dataSource.append (createAboutUsMenu())
         dataSource.append (createLogoutMenu())
         dataSource.append (createContactMenu())
    }
    else
    { 
         dataSource.append (createHomeMenu())
         dataSource.append (createAboutUsMenu())
         dataSource.append (createLoginRegisterMenu())  
         dataSource.append (createContactMenu())
    }

    myTableView.reloadData()
}

func tableView(....numberOfRows...)
{
   return dataSource.count
}

func tableView(....cellForRow...)
{
   let cell == tableView.dequeue...
   ... 
   ...
   cell.updateCustomCellUsing(dataSource[indexPath.row])
   ...
   ...
   return cell
}

func createMyProfileMenu() -> CustomMenuItemModel
{
    let item = CustomMenuItemModel()
    item.titleText = "Profile"
    ...
    ...
    return item
}

..
.. // Further menu item creation code


func userDidLogout() // Delegate or NSNotification callback
{
   MySessionManager.current.clearUserDataFromSession()
   prepareDataSource()
   myTableView.reloadData() 
}

func userDidLogIn() // Delegate or NSNotification callback
{
   MySessionManager.current.setupUserInSession()
   prepareDataSource()
   myTableView.reloadData() 
}

在按下注销时，使用NSNotification或委托在左侧菜单视图控制器中重新加载tableview。

编辑：Objective-C版本

NSMutableArray dataSource = [NSMutableArray new];
-(void)prepareDataSource
{
    dataSource = [NSMutableArray new];
    if([[MySessionManager current] isUserLoggedIn])
    {
         [dataSource addObject:[self createMyProfileMenu]];
         [dataSource addObject:[self createAboutUsMenu]];
         [dataSource addObject:[self createLogoutMenu]];
         [dataSource addObject:[self createContactMenu]];
    }
    else
    { 
         [dataSource addObject:[self createHomeMenu]];
         [dataSource addObject:[self createAboutUsMenu]];
         [dataSource addObject:[self createLoginRegisterMenu]]; 
         [dataSource addObject:[self createContactMenu]];
    }

    [myTableView reloadData];
}

-(void)tableView(....numberOfRows...)
{
    return dataSource.count;
}

-(void)tableView(....cellForRow...)
{
   let cell == tableView.dequeue...
   ... 
   ...
   [cell updateCustomCellUsing(dataSource[indexPath.row])];
   ...
   ...
   return cell
}

-(CustomMenuItemModel *)createMyProfileMenu
{
    CustomMenuItemModel *item = [CustomMenuItemModel new];
    item.titleText = "Profile";
    ...
    ...
    return item
}

..
.. // Further menu item creation code


-(void)userDidLogout // Delegate or NSNotification callback
{
   [[MySessionManager current] clearUserDataFromSession];
   [self prepareDataSource];
   [myTableView reloadData];
}

-(void)userDidLogIn // Delegate or NSNotification callback
{
   [[MySessionManager current] setupUserInSession];
   [self prepareDataSource];
   [myTableView reloadData]; 
}

Answer 2

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(refreshList)
                                                 name:@"refreshList"
                                               object:nil];


if ([[[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] allKeys] containsObject:@"userlogging"]) {
        NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"userlogging"];
        if ([login isEqualToString:@"loggedin"]) {
            NSArray *titles = @[@"Search Restaurants",@"Change Language",@"Sellers click here",@"Login"];
            checklogin = YES;
        }
    }
    else
    {
         NSArray *titles = @[@"Search Restaurants", @"My Cart", @"Favorite Restaurants",  @"Previous Orders",@"Change Language",@"Sellers click here", @"My Profile", @"Logout"];
         checklogin = NO;
    }
    [self.tableView reloadData];

在IOS中滑出菜单栏

2 个答案: