各位大家好，我很想知道你是否可以更新按钮内的单元格？我已经按下了按钮的代码，它得到你的lat / lng并打印出来，但现在我正在尝试更新我的其他swift文件中的Lat和Lng单元格 CoordinatesAltitudeDegreesTableViewCell.swift 截至目前我的tableview函数似乎工作，我测试更新viewController函数中的单元格，它的工作原理。
我的问题是将这些函数放在按钮中，以便lat / lng变量在范围内
旁注：我一直在寻找解决方案两天，我似乎找到任何帮助我的页面，希望这不是一个转发，如果有事先抱歉
*再次，对不起，我对swift编程很陌生
import UIKit
import Alamofire
import SwiftyJSON
import CoreLocation
import MapKit
class myTableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, CLLocationManagerDelegate{
//----------------------
// Buttons and Variables
//----------------------
var lastLocation: CLLocation? = nil
@IBOutlet weak var tableView: UITableView!
@IBAction func generateInfo(sender: AnyObject) {
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
let lat: Double! = lastLocation?.coordinate.latitude
let lng: Double! = lastLocation?.coordinate.longitude
let alt: Double! = lastLocation?.altitude
print(lat)
print(lng)
print(alt)
locationManager.stopUpdatingLocation()
} // end of button
//--------------
// Main Function
//--------------
override func viewDidLoad(){
super.viewDidLoad()
print("Hello World")
self.tableView.dataSource = self
self.tableView.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//-------------------
// LOCATION FUNCTIONS
//-------------------
// Represents Location Manager
lazy var locationManager: CLLocationManager = {
let manager = CLLocationManager()
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
return manager
}()
// Location Authorization Function
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus){
if case .authorizedWhenInUse = status {
manager.requestLocation()
} else {
print("yeah... that didn't work")
}
}
// Location Error handle
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("that didn't work")
}
// Location Object
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]){
if let location = locations.first {
lastLocation = location
}
}
//--------------------
// TABLEVIEW FUNCTIONS
//--------------------
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "imageCellCustomCell", for: indexPath) as! ImageCellTableViewCell
return cell
}
else if indexPath.row == 1{
let cell = self.tableView.dequeueReusableCell(withIdentifier: "coordinatesAltitudeDegreesCustomCell", for: indexPath) as! CoordinatesAltitudeDegreesTableViewCell
cell.latLabel.text = "text"
return cell
}
else if indexPath.row == 2{
let cell = tableView.dequeueReusableCell(withIdentifier: "censusGeographyCustomCell", for: indexPath) as! CensusGeographyTableViewCell
return cell
}
else if indexPath.row == 3{
let cell = tableView.dequeueReusableCell(withIdentifier: "nearestAddressCustomCell", for: indexPath) as! NearestAddressTableViewCell
return cell
}
else if indexPath.row == 4{
let cell = tableView.dequeueReusableCell(withIdentifier: "populationCustomCell", for: indexPath) as! PopulationTableViewCell
return cell
}
else if indexPath.row == 5{
let cell = tableView.dequeueReusableCell(withIdentifier: "ethnicityCustomCell", for: indexPath) as! EthnicityTableViewCell
return cell
}
else if indexPath.row == 6{
let cell = tableView.dequeueReusableCell(withIdentifier: "raceCustomCell", for: indexPath) as! RaceTableViewCell
return cell
}
else if indexPath.row == 7{
let cell = tableView.dequeueReusableCell(withIdentifier: "ageCustomCell", for: indexPath) as! AgeTableViewCell
return cell
}
else if indexPath.row == 8{
let cell = tableView.dequeueReusableCell(withIdentifier: "populationPyramidCustomCell", for: indexPath) as! PopulationPyramidTableViewCell
return cell
}
else {
let cell = tableView.dequeueReusableCell(withIdentifier: "houseHoldCustomCell", for: indexPath) as! HouseHoldTableViewCell
return cell
}
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if indexPath.row == 0 {
return 300
}
else if indexPath.row == 1{
return 130
}
else if indexPath.row == 2{
return 100
}
else if indexPath.row == 3{
return 100
}
else if indexPath.row == 4{
return 90
}
else if indexPath.row == 5{
return 110
}
else if indexPath.row == 6{
return 200
}
else if indexPath.row == 7{
return 300
}
else if indexPath.row == 8{
return 300
}
else {
return 360
}
}
}
答案 0 :(得分：0)
您的班级中应该有lat, long, alt的变量，而CoordinatesAltitudeDegreesTableViewCell中的变量也应该包含这些变量。
例如，这是一段代码片段。
class SomeViewController: UIViewController {
// Set these attributes here cause they will be used as your source of data for the UITableViewCell
var lat: Int = 0
var lon: Int = 0
var alt: Int = 0
@IBOutlet var tableView: UITableView!
@IBOutlet var someButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
someButton.addTarget(self, action: #selector(self.someButtonClicked(_:)), forControlEvents: .TouchUpInside)
}
func someButtonClicked(sender: UIButton) {
lat = 100 // set to different values
lon = 10 // set to different values
alt = 30 // set to different values
// when you reload the tableView all the `UITableViewDelegate, UITableViewDataSource` codes will be called again therefore refreshing your cells.
tableView.reloadData()
}
}
extension SomeViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "SomeCustomCell", for: indexPath) as! SomeCustomCell
// set the parameters
cell.lat = self.lat
cell.lon = self.lon
cell.alt = self.atl
return cell
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
}
class SomeCustomCell: UITableViewCell {
var lat: Int = 0 {
didSet { // just in case you don't know about didSet there's an explanation below
lblLat.text = "\(lat)"
}
}
var lon: Int = 0 {
didSet {
lblLon.text = "\(lon)"
}
}
var alt: Int = 0 {
didSet {
lblAlt.text = "\(alt)"
}
}
... insert some ui objects here
@IBOutlet var lblLat: UILabel!
@IBOutlet var lblLon: UILabel!
@IBOutlet var lblAlt: UILabel!
... insert some ui objects here
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
有很多方法可以做到这一点，但这是我能想到的最简单的方法。
didSet说明
var someVariable: <SomeDataType> = <SomeValue> {
didSet {
// this block is called whenever this variable's value is changed (i.e someVariable)
}
}
例如：
var name: String = "" {
didSet {
print(name)
}
}
init() {
name = "Capaldi"
name = "Tennant"
name = "Smith"
name = "Eccleston"
}
在你的调试器中，它会输出类似这样的内容，因为每次设置名称
时都会调用didSetCapaldi
Tennant
Smith
Eccleston