[英]Pass data from UITableView to UICollectionView
我想获得一个JSON响应并在我的viewcontroller中显示数据。
我有这个JSON响应:
{"status":1,"data":{"blocks":[{"name":"CustomBlock","description":"CustomDescription","items":[1]}], "items":[{"id:"1", name: "testgame"}]}
我有块名称,描述和项目数组。 此外,所有项目都在这里传递关键“项目”
我创建了这个tableview类
BlocksTableView.swift
class BlocksTableView : UITableView, UITableViewDataSource,
UITableViewDelegate
{
var blocks = [Block]()
var items : BlockItem!
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
self.loadBlocks()
}
func loadBlocks()
{
guard let url = URL(string : "myURL") else { return }
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else { return }
do {
let response = try JSONDecoder().decode(APIResponse.self, from: data)
self.blocks = response.data.blocks;
self.items = response.data.items;
DispatchQueue.main.async {
self.reloadData()
}
} catch let jsonErr {
print(jsonErr)
}
}.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return blocks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
cell.blockName.text = blocks[indexPath.row].name
cell.blockDescription.text = blocks[indexPath.row].description
cell.gameCollectionView.reloadData()
return cell
}
}
现在我想在tableviewcell里面的collectionview中显示项目,但我不知道如何做到这一点。 由于每个块具有不同的项目数,我需要将块和项变量传递给我的CollectionViewClass,对吧? 但如何正确地做到这一点?
这是我的collectionviewclass
class GameCollectionView : UICollectionView,
UICollectionViewDataSource, UICollectionViewDelegate
{
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
//here i need to return number of items in current block, something like blocks[0].items.count
return 0
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
UICollectionViewCell()
}
return cell
}
你可以试试
class BlocksTableView : UITableView, UITableViewDataSource,UITableViewDelegate,UICollectionViewDataSource, UICollectionViewDelegate {
var blocks = [Block]()
var items : BlockItem!
override func awakeFromNib() {
self.delegate = self
self.dataSource = self
self.loadBlocks()
}
func loadBlocks()
{
guard let url = URL(string : "myURL") else { return }
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else { return }
do {
let response = try JSONDecoder().decode(APIResponse.self, from: data)
self.blocks = response.data.blocks;
self.items = response.data.items;
DispatchQueue.main.async {
self.reloadData()
}
} catch let jsonErr {
print(jsonErr)
}
}.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return blocks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
cell.blockName.text = blocks[indexPath.row].name
cell.blockDescription.text = blocks[indexPath.row].description
cell.gameCollectionView.delegate = self
cell.gameCollectionView.dataSource = self
cell.gameCollectionView.tag = indexPath.row
cell.gameCollectionView.reloadData()
return cell
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return blocks[collectionView.tag].items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
UICollectionViewCell() }
// here use blocks[collectionView.tag].items[indexPath.row] for each item
return cell
}
}
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