如何检测双击的标签栏？

Question

在Tabbar DidSelectItem中使用NSNotification来调用向上滚动方法。

-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
   [[NSNotificationCenter defaultCenter] postNotificationName:@"homeScrollUp" object:nil];
}

它工作得很好但是如何通过点击索引标签0两次来检测它？例如？

Answer 1

如何链接此内容？确保在清理课程时使计时器无效。

-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
   NSUInteger indexOfTab = [[theTabBar items] indexOfObject:item];
   if(indexOfTab==0) {
      self.chosenIndexTapped++
   }
  self.tabPressTimer = [NSTimer scheduledTimerWithTimeInterval:smallTimeToAllowTap
                                                              target:self
                                                            selector:@selector(handleRecognisedTap)
                                                            userInfo:nil
                                                             repeats:NO];
  [[NSRunLoop currentRunLoop] addTimer:self.tabPressTimer forMode:NSRunLoopCommonModes]; 
}

-(void)handleRecognisedTap {
    if(self.chosenIndexTapped>1){
        //Scroll to top
    }
    self.chosenIndexTapped = 0 //Reset the taps on your chosen index
}