由于公司的项目是OC实现的，现在自己又在学swift，所以自己抽空写了swift版本的，目前整个项目完成了1/3吧。先看下今天要说的效果图：
联动.gif
这是基于上次iOS将数据从controller里分离出来减轻controller的压力这篇文章中的效果做的，只是那边是OC，现在用swift实现，这里就不分离数据了。
联动的原理：点击左边的tableView的时候刷新右边collectionView的数据源。
下面是代码实现（有几句关键代码我会提取出来以及重现几个开发中遇到的问题）：
关键代码
一开始默认选中tableview的第0个row
self.tableView(self.tableview, didSelectRowAt: NSIndexPath.init(row: 0, section: 0) as IndexPath)
tableview的didSelectRowAt indexPath代理实现
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
///cell单选
for i :Int in 0 ..< self.dataArr.count{
let j:NSIndexPath = NSIndexPath.init(row: i, section: indexPath.section)
let cell :UITableViewCell = tableView.cellForRow(at: j as IndexPath)!
cell.backgroundColor = BACKGROUND_Color
cell.textLabel?.textColor = .black
}
let cell :UITableViewCell = tableView.cellForRow(at: indexPath)!
cell.backgroundColor = .clear
cell.textLabel?.textColor = .red
loadRightData(menuId: (self.leftData?.data?[indexPath.row].id)!)//获取到参数并加载右边数据
}
开发中遇到的问题（可能是没去看swift的说明[尴尬]）
由于右边的collectionView的section只需头部不需要尾部，所以只注册了header，在实现UICollectionViewDelegateFlowLayout代理的时候只实现了header的大小（和OC做法一致），然后Xcode给我报了个错，如下图：
error.jpeg
于是我除了返回header的大小，还返回了footer的大小
//section头部高度
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width:self.collection.frame.size.width,height:30)
}
//section尾部高度
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize {
return CGSize(width:self.collection.frame.size.width,height:0)
}
具体代码实现
controller.swift代码
import UIKit
import HandyJSON
let ZLMCollectID = "item"
let ZLMHeaderID = "header"
class ZLMCategoryViewController: ZLMBaseViewController {
var dataArr:Array<ZLMCateDataModel?> = []{ didSet { setDataSource() }
}
var rightDataArr:Array<CategoryModelList?> = []
var leftData:ZLMCategoryModel?
var rightData:ZLMCategoryRightModel?
lazy var tableview :UITableView = {[weak self](result) in
let tab = UITableView(frame: CGRect(x:0,y:64,width:ScreenW/4, height:ScreenH-49))
tab.delegate = self
tab.dataSource = self
tab.backgroundColor = BACKGROUND_Color
tab.tableFooterView = UIView()//去除无数据的空tableViewCell
return tab
}()
lazy var collection :UICollectionView = {
let defaultLayout = UICollectionViewFlowLayout()
defaultLayout.scrollDirection = UICollectionViewScrollDirection.vertical//设置垂直显示
defaultLayout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0)//设置边距
defaultLayout.itemSize = CGSize(width:(ScreenW/4*3-10)/3, height: 100)
defaultLayout.minimumLineSpacing = 5.0 //每个相邻的layout的上下间隔
defaultLayout.minimumInteritemSpacing = 5.0 //每个相邻layout的左右间隔
defaultLayout.headerReferenceSize = CGSize(width: 0, height: 0)
defaultLayout.footerReferenceSize = CGSize(width: 0, height: 15)
let collect = UICollectionView(frame:CGRect(x:ScreenW/4,y:64,width:ScreenW/4*3,height:ScreenH-49-64),collectionViewLayout: defaultLayout)
collect.backgroundColor = .white
//注册cell
collect.register(UINib(nibName: "ZLMCateCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: ZLMCollectID)
//注册头部
// collect.register(ZLMHeaderCollectionReusableView.self, forSupplementaryViewOfKind:UICollectionElementKindSectionHeader, withReuseIdentifier: ZLMHeaderID) //用代码实现的view
collect.register(UINib(nibName: "ZLMHeaderCollectionReusableView", bundle: nil), forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: ZLMHeaderID)//用xib实现的view
collect.delegate = self
collect.dataSource = self
return collect
}()
override func viewDidLoad() {
super.viewDidLoad()
//自定义的一个自定义controller导航栏方法
configNavigationBar(controllerTitle:"分类",leftBtnHidden: true, rightBtnHidden: true, rightBtnTitle: "")
view.addSubview(tableview)
view.addSubview(collection)
loadLeftData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension ZLMCategoryViewController:UITableViewDelegate,UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.dataArr.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cellID = "cellId"
var cell = tableView.dequeueReusableCell(withIdentifier: cellID)
if cell == nil {
cell = UITableViewCell(style: .default,reuseIdentifier:cellID)
}
cell?.backgroundColor = BACKGROUND_Color
cell?.textLabel?.text = self.dataArr[indexPath.row]?.appCategoryName
cell?.textLabel?.textAlignment = NSTextAlignment(rawValue: 1)!
cell?.textLabel?.font = UIFont.systemFont(ofSize: 12)
cell?.textLabel?.textColor = RGBA(r:0.0,g:0.0,b:0.0,a:1.0)
cell?.accessoryType = .none
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
///cell单选
for i :Int in 0 ..< self.dataArr.count{
let j:NSIndexPath = NSIndexPath.init(row: i, section: indexPath.section)
let cell :UITableViewCell = tableView.cellForRow(at: j as IndexPath)!
cell.backgroundColor = BACKGROUND_Color
cell.textLabel?.textColor = .black
}
let cell :UITableViewCell = tableView.cellForRow(at: indexPath)!
cell.backgroundColor = .clear
cell.textLabel?.textColor = .red
loadRightData(menuId: (self.leftData?.data?[indexPath.row].id)!)
}
}
extension ZLMCategoryViewController:UICollectionViewDelegate,UICollectionViewDataSource{
func numberOfSections(in collectionView: UICollectionView) -> Int {
return rightDataArr.count
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return (rightDataArr[section]?.categoryModels!.count)!
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell:ZLMCateCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: ZLMCollectID, for: indexPath as IndexPath) as! ZLMCateCollectionViewCell
cell.model = rightDataArr[indexPath.section]?.categoryModels?[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView{
var sectionView = ZLMHeaderCollectionReusableView()
if kind == UICollectionElementKindSectionHeader{
sectionView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: ZLMHeaderID, for: indexPath) as! ZLMHeaderCollectionReusableView
sectionView.model = rightDataArr[indexPath.section]
}
return sectionView
}
}
extension ZLMCategoryViewController:UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let side :CGFloat = (self.collection.frame.size.width-6*8)/3.0-8.0
return CGSize(width:side,height:side+20)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsetsMake(0, 8, 0, 8)
}
//section头部高度
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width:self.collection.frame.size.width,height:30)
}
//section尾部高度
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize {
return CGSize(width:self.collection.frame.size.width,height:0)
}
}
extension ZLMCategoryViewController{
// func loadLeftData(){
// NetworkTools.sharedInstance.loadCateLeft { (response) in
// //response现在就是data
// //遍历或是直接取就好了
// self.dataArr = response
// }
// }
func loadLeftData(){
let url = host+"categorys/findByGrade"
let parameter = ["grade":"1"]
NetworkTools.sharedInstance.request(type:.GET,url: url, parameters: parameter){ (response) in
self.leftData = JSONDeserializer<ZLMCategoryModel>.deserializeFrom(json: response)
if (self.leftData?.data?.count)! > 0{
self.leftData?.data?.forEach({
self.dataArr.append($0)
})
self.tableview.reloadData()
self.tableview.selectRow(at: NSIndexPath.init(row: 0, section: 0) as IndexPath, animated: true, scrollPosition: .bottom)
self.tableView(self.tableview, didSelectRowAt: NSIndexPath.init(row: 0, section: 0) as IndexPath)
}
}
}
func loadRightData(menuId:Int) {
let url = host+"categorys/"+"\(menuId)"+"/childs"
NetworkTools.sharedInstance.request(type:.GET,url: url){ (response) in
self.rightData = JSONDeserializer<ZLMCategoryRightModel>.deserializeFrom(json: response)
if self.rightData?.code == 1{
self.rightDataArr.removeAll()
self.rightData?.data?.categoryModelList?.forEach({
self.rightDataArr.append($0)
})
self.collection.reloadData()
}
}
}
func setDataSource() {
tableview.reloadData()
}
}
cell中的代码就不写了，
分类.jpeg
由于是公司项目，就不方便贴上demo了，有问题可评论留言哦。
以上。
