仿高德地图搜索结果页面

pan.swift

func someMethod(){
   vc.panGesstrueCallBack { [weak self](offset, ges, vc ,tableView ,isDragUp) in
            
            guard let strongSelf = self else { return }
            guard let targetV = self?.targetView else { return }
            
            var isScrollingTableView = false //正在滚动
            
            if vc.view.frame.size.height >= targetV.frame.size.height  && isDragUp {
                isScrollingTableView = true
            }else if vc.view.frame.size.height >= targetV.frame.size.height && tableView.contentOffset.y != 0 {
                isScrollingTableView = true
            }else {
                isScrollingTableView = false
            }
            
            tableView.canScroll = isScrollingTableView
            
            switch ges.state {
            case .began:
                
                self?.originHeight = vc.view.frame.height
                self?.originTableOffset = tableView.contentOffset.y
                
            case .changed:
                
                if tableView.canScroll /*isScrollEnabled*/ {
                    return
                }
                
                let originHeight  = strongSelf.originHeight
                var currentHeight = originHeight - (offset - strongSelf.originTableOffset)
                
                //限制最大高度
                if currentHeight > targetV.frame.size.height {
                    currentHeight = targetV.frame.size.height
                }
 
                vc.view.snp.remakeConstraints({ (make) in
                    make.left.right.bottom.equalTo(targetV)
                    make.height.equalTo(currentHeight)
                })

            case .ended:
                
                let originHeight = strongSelf.originHeight
                if tableView.canScroll {
                    return
                }
                
                //滚动的生效阈值,不满足条件返回原始值
                if abs(offset) < 30 {
                    vc.view.snp.remakeConstraints({ (make) in
                        make.left.right.bottom.equalTo(targetV)
                        make.height.equalTo(originHeight)
                    })
                    UIView.animate(withDuration: 0.3) {
                        targetV.layoutIfNeeded()
                    }
                    
                }else {
                    
                    //原始比例
                    let origPercent = originHeight/targetV.frame.size.height
                    let isDragUp = (offset - strongSelf.originTableOffset) < 0 //上拉
                    
                    //三段式 33.33%  66.67%
                    var finalHeight:CGFloat = 30
                    if origPercent > 0.667 {

                        if isDragUp {
                            finalHeight = targetV.frame.size.height
                        }else {
                            finalHeight = targetV.frame.size.height/2
                        }
                        
                    }else if origPercent > 0.33 {
                        
                        if isDragUp {
                            finalHeight = targetV.frame.size.height
                        }else {
                            finalHeight = 30
                        }
                        
                    }else{
                        
                        if isDragUp {
                            finalHeight = targetV.frame.size.height/2
                        }else {
                            finalHeight = 30
                        }
                    }
                    
                    vc.view.snp.remakeConstraints({ (make) in
                        make.left.right.bottom.equalTo(targetV)
                        make.height.equalTo(finalHeight)
                    })

                    UIView.animate(withDuration: 0.3, animations: {
                        targetV.layoutIfNeeded()
                    }, completion: { (finish) in
                    })
                }
        
            default:
                return
            }
        }
}

tableview.swift

class MapSearchDisplayTableView: BaseTableView {
    
    //是否可以滚动
    var canScroll:Bool = false{
        didSet{
            self.showsVerticalScrollIndicator = canScroll
        }
    }
   
   //代理方法略。。
   
   
   
   //监听滚动
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        
        if canScroll == false {
            scrollView.contentOffset = CGPoint.zero
        }
        //滑动到顶端
        if scrollView.contentOffset.y <= 0 {
            canScroll = false
        }
    }
}