MZSegmentController

Description

类似AppStore详情页结构，左右视图可滑动，可tab切换 可自定义segmentHeaderView，多视图共用，header纵向可滑动

Examples

• init初始化

    BaseViewController *tabViewVC1 = [[BaseViewController alloc] initWithNibName:@"BaseViewController"   bundle:nil];
    BaseViewController *tabViewVC2 = [[BaseViewController alloc] initWithNibName:@"BaseViewController" bundle:nil];
    BaseViewController *tabViewVC3 = [[BaseViewController alloc] initWithNibName:@"BaseViewController" bundle:nil];
    
    self.pager = [[MZSegmentController alloc] initWithControllers:tabViewVC1,tabViewVC2,tabViewVC3,nil];
    
    [self.view addSubview:_pager.view];

• BaseViewController都带有UITableView（UIScrollview）  

  • 给tableview设置一个跟SegmentController中HeaderView一样高度的headerView，
  • 保证滑动tableView时SegmentController中HeaderView的frame.origin.y的值与tableView.contentOffSet.y改变保持一致(障眼法)
  • @return UIView

   	 -(UIView *)setTableHeaderView
   	 {
        
   	 }
  

• #pragma mark - MZSegmentControllerDelegate

      /**
 	*  确保MZSegmentController的scrollView上的多个controller实现同步隐藏headerView，或露出的高度一致
  	*
   	*  @param offset visiable controller contentOffset.y的值
  	*/
  
       - (void)setTableContentOffSet:(CGFloat)offset
       {
      
       }

• #pragma mark - obsever delegate methods

//headerView  跟随当前显示tableView滑动而滑动
  
  -(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
  {
    if (context == _MZSEGMENTPAGE_CURRNTPAGE_SCROLLVIEWOFFSET) {
        CGPoint offset = [change[NSKeyValueChangeNewKey] CGPointValue];
        CGFloat offsetY = offset.y;
        
        if (offsetY < (self.segmentHeight + self.headerHeight + _topBarHeight)) {
            CGRect frame = _headerView.frame;
            frame.origin.y = -offsetY+_topBarHeight;
            _headerView.frame = frame;
            
            frame = _segmentView.frame;
            frame.origin.y = _headerView.bottom;
            _segmentView.frame = frame;
            [self.delegate showIvLogo:YES];
        }
        else {  //完全隐藏HeaderView
            
            CGRect frame = _headerView.frame;
            frame.origin.y = -(self.segmentHeight + self.headerHeight + _topBarHeight);
            _headerView.frame = frame;
            
            frame = _segmentView.frame;
            frame.origin.y = _headerView.bottom;
            _segmentView.frame = frame;
            
            [self.delegate showIvLogo:NO];
        }
    }
 }