TTLauncherItem:立即更改徽章(或:如何刷新TTLauncherView)

Question

我有一个TTLauncherView和一些TTLauncherItems。这些显示标记，表示来自网络的消息。我在viewWillAppear:中设置了徽章，所以如果切换到另一个视图，然后返回，就会显示正确的徽章。但我想在收到信息后更新徽章。

打电话给setNeedsDisplay on TTLauncherView没有帮助吗？

如何刷新TTLauncherView

在我的MessageReceiver课程中，我这样做：

TTNavigator* navigator = [TTNavigator navigator];

            [(OverviewController *)[navigator viewControllerForURL:@"tt://launcher"] reloadLauncherView] ;

我的TTViewController派生的OverviewController

@implementation OverviewController


- (id)init {
  if (self = [super init]) {
    self.title = OverviewTitle;
  }
  return self;
}

- (void)dealloc {
    [items release];
    [overView release];
    [super dealloc];
}


-(void)viewDidLoad
{
    [super viewDidLoad];

    overView = [[TTLauncherView alloc] initWithFrame:self.view.bounds];
    overView.backgroundColor = [UIColor whiteColor];
    overView.delegate = self;
    overView.columnCount = 4;

    items = [[NSMutableArray alloc] init];
    for(int i = 1; i <= NumberOfBars; ++i){
        NSString *barID = [NSString stringWithFormat:NameFormat, IDPrefix, i];
        TTLauncherItem *item = [[[TTLauncherItem alloc] initWithTitle:barID
                                                                image:LogoPath
                                                                  URL:[NSString stringWithFormat:@"tt://item/%d", i]
                                                            canDelete:NO] autorelease];
        [barItems addObject: item];


    }
    overView.pages = [NSArray arrayWithObject:items];
    [self.view addSubview:overView];

}

-(void)viewWillAppear:(BOOL)animated
{


    for(int i = 0; i <[barItems count]; i++){
        TTLauncherItem *item = [items objectAtIndex:i];
        NSString *barID = [NSString stringWithFormat:NameFormat, IDPrefix, i+1];
        P1LOrderDispatcher *dispatcher = [OrderDispatcher sharedInstance];
        P1LBarInbox *barInbox = [dispatcher.barInboxMap objectForKey:barID];
        item.badgeNumber = [[barInbox ordersWithState:OrderState_New]count];
    }
    [super viewWillAppear:animated];
}


- (void)launcherView:(TTLauncherView*)launcher didSelectItem:(TTLauncherItem*)item 
{
    TTDPRINT(@"%@", item);
    TTNavigator *navigator = [TTNavigator navigator];
    [navigator openURLAction:[TTURLAction actionWithURLPath:item.URL]];
}

-(void)reloadLauncherView
{

    [overView setNeedsDisplay];//This doesn't work
}
@end

Answer 1

我在LauncherView上注册了控制器，在AppDelegate上注册。在我的消息类中，我调用了[appDelegate reloadLauncherView];，它将再次调用这个

-(void)reloadLauncherView
{
    [self viewWillAppear:NO ];
}

在包含LauncherView的控制器上。

Answer 2

今天我遇到了一个非常类似的问题，(修改TTLauncherItem，没有直接看到我的更改)，并且在修改TTLauncherItem之前通过调用[myLauncherView layoutSubviews];来解决这个问题。实际上，我在代码中跟踪了它，这是因为layoutSubviews将重新创建LauncherView的_buttons数组(在我的例子中，这是需要实现的)。