iOS: Tapjoy全屏广告打开多个屏幕

Question

我试图在我的应用程序中使用Tapjoy，我使用以下代码

-(void)getTapJoyAd{
    [Tapjoy getFullScreenAd];

    // A notification method must be set to retrieve the fullscreen ad object.
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(getFullScreenAd:)
                                                 name:TJC_FULL_SCREEN_AD_RESPONSE_NOTIFICATION
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(fullscreenAdClosed:)
                                                 name:TJC_VIEW_CLOSED_NOTIFICATION
                                               object:nil];

    // This method requests the tapjoy server for current virtual currency of the user.
    [Tapjoy getTapPoints];
    // A notification method must be set to retrieve the points.
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getUpdatedPoints:) name:TJC_TAP_POINTS_RESPONSE_NOTIFICATION object:nil];
}

问题是，当我再次回忆起这个方法时，它会同时打开两个屏幕。我越叫这个方法，屏幕就越打开。

Answer 1

基本上，问题在于您的notification被观察了多少次，然后您的方法正在执行。因此，防止此问题的一种方法是，一旦发布并观察到notification，然后删除notification observer。另外，这也取决于您的代码，您是如何处理notification部件的。因此，尝试remove observer并检查如下：

-(void)viewDidDisappear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter]removeObserver:self name:TJC_FULL_SCREEN_AD_RESPONSE_NOTIFICATION object:nil];
    [[NSNotificationCenter defaultCenter]removeObserver:self name:TJC_VIEW_CLOSED_NOTIFICATION object:nil];
    [[NSNotificationCenter defaultCenter]removeObserver:self name:TJC_TAP_POINTS_RESPONSE_NOTIFICATION object:nil];
}