tableView 数据源的字典
dictionary for tableView datasource
我正在尝试为 tableView 数据源使用字典,我正在从数据库中获取一个对象,其中包含一个键和一个值数组,因此 [String: [String]]
var requestedList = [String]()
var keyArr = [String]()
var requestedDictionary = [String: [String]]()
let tQuery = PFQuery(className: "MyClass")
tQuery.whereKey("username", equalTo: PFUser.current()?.username as Any)
tQuery.selectKeys(["descContent", "header"])
do {
let returnedObjects = try tQuery.findObjects()
for object in returnedObjects {
let header = object["header"] as! String
keyArr.append(header)
if let arr = object["descContent"] as! [String]? {
requestedDictionary[header] = arr
requestedList += arr
}
}
} catch {
}
我似乎无法将值与 tableView 的行正确对应,但是有人建议我使用数组来存储值,这就是我对 keyArr 所做的。我的问题是如何在数据源方法中访问键的内容和相应的值?这是我到目前为止所拥有的,但我无法 link 相应的键和值
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return requestedList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "RequestViewCell", for: indexPath) as! RequestViewCell
cell.descLbl.text = "Your ticket has been requested by \(requestedList[indexPath.row])"
cell.refLbl.text = "for: \(keyArr[indexPath.row])"
cell.leftBtn.tag = (indexPath.section * 100) + indexPath.row
cell.leftBtn.addTarget(self, action: #selector(leftClick(sender:)), for: .touchUpInside)
cell.rightBtn.tag = (indexPath.section * 100) + indexPath.row
cell.rightBtn.addTarget(self, action: #selector(rightClick(sender:)), for: .touchUpInside)
return cell
}
您可以通过这种方式将 字典 转换为 tableView 可表示数据。
let requestedDictionary:[String: [String]] = [
"Key-1":["Value-1","Value-2","Value-3","Value-4"],
"Key-A":["Value-X","Value-Y","Value-Z"],
"Key-a":["Value-x","Value-y"],
]
lazy var data:[(key:String,values:[String])] = requestedDictionary.compactMap({(key:[=10=],values:)})
func numberOfSections(in tableView: UITableView) -> Int {
data.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data[section].values.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = data[indexPath.section].values[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return data[section].key
}
希望对您有所帮助。
我正在尝试为 tableView 数据源使用字典,我正在从数据库中获取一个对象,其中包含一个键和一个值数组,因此 [String: [String]]
var requestedList = [String]()
var keyArr = [String]()
var requestedDictionary = [String: [String]]()
let tQuery = PFQuery(className: "MyClass")
tQuery.whereKey("username", equalTo: PFUser.current()?.username as Any)
tQuery.selectKeys(["descContent", "header"])
do {
let returnedObjects = try tQuery.findObjects()
for object in returnedObjects {
let header = object["header"] as! String
keyArr.append(header)
if let arr = object["descContent"] as! [String]? {
requestedDictionary[header] = arr
requestedList += arr
}
}
} catch {
}
我似乎无法将值与 tableView 的行正确对应,但是有人建议我使用数组来存储值,这就是我对 keyArr 所做的。我的问题是如何在数据源方法中访问键的内容和相应的值?这是我到目前为止所拥有的,但我无法 link 相应的键和值
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return requestedList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "RequestViewCell", for: indexPath) as! RequestViewCell
cell.descLbl.text = "Your ticket has been requested by \(requestedList[indexPath.row])"
cell.refLbl.text = "for: \(keyArr[indexPath.row])"
cell.leftBtn.tag = (indexPath.section * 100) + indexPath.row
cell.leftBtn.addTarget(self, action: #selector(leftClick(sender:)), for: .touchUpInside)
cell.rightBtn.tag = (indexPath.section * 100) + indexPath.row
cell.rightBtn.addTarget(self, action: #selector(rightClick(sender:)), for: .touchUpInside)
return cell
}
您可以通过这种方式将 字典 转换为 tableView 可表示数据。
let requestedDictionary:[String: [String]] = [
"Key-1":["Value-1","Value-2","Value-3","Value-4"],
"Key-A":["Value-X","Value-Y","Value-Z"],
"Key-a":["Value-x","Value-y"],
]
lazy var data:[(key:String,values:[String])] = requestedDictionary.compactMap({(key:[=10=],values:)})
func numberOfSections(in tableView: UITableView) -> Int {
data.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data[section].values.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = data[indexPath.section].values[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return data[section].key
}
希望对您有所帮助。