-(void)widgetActiveDisplayModeDidChange:(NCWidgetDisplayMode)activeDisplayMode withMaximumSize:(CGSize)maxSize
{
    if (activeDisplayMode == NCWidgetDisplayModeCompact){
        [UIView animateWithDuration:0.25 animations:^{
            self.preferredContentSize = maxSize;
            [self.view layoutIfNeeded];
        }];
    }
    else if (activeDisplayMode == NCWidgetDisplayModeExpanded){
        newHeight = [self getNewWidgetHeight];
        [UIView animateWithDuration:0.25 animations:^{
            self.preferredContentSize = CGSizeMake(0,newHeight);
            [self.view layoutIfNeeded];
        }];
    }
}

一切正常.但是如果我将小部件保持在紧凑模式(显示更多选项)并且如果我重新运行/重新打开小部件屏幕,并且如果我点击“显示更多”按钮,即使触发委托方法也没有任何反应.我应该按2次显示更多/更少,直到小部件开始扩展.
我也收到这个错误：没有活动的动画块！