我目前正致力于开发一个从php Web服务中提取数据（地址和位置信息）的应用程序，并在tableview单元格中将数据显示为字符串。我的tableview嵌入在导航控制器中，当单击一个单元格时，segue会链接到地图上带有几个硬编码引脚的地图。
我有兴趣创建一个segue，它将tableview单元格（Address）链接到地图中的特定pin / annotation，作为对地址的直接引用。
此外，我有兴趣创建一个自定义注释，显示有关其位置的数据（名称，地址，照片等）。
理想情况下，我正在尝试重新创建一个更简单的SpotHero版本。
谢谢！
Heres我的一些代码：
TableController：
class TableController：UITableViewController {
var TableData:Array< String > = Array < String >()
var garagedata :Array<String> = Array < String >()
override func viewDidLoad() {
super.viewDidLoad()
get_data_from_url("http://cgi.soic.indiana.edu/~team20/service.php")
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return TableData.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "BasicCell", for: indexPath)
cell.textLabel?.text = TableData[indexPath.row]
//Wrap text in tableview
cell.textLabel?.numberOfLines=0
return cell
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
//Automatic sizing of tableviewcells
return UITableViewAutomaticDimension
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// Segue to the second view controller
self.performSegue(withIdentifier: "detailSegue", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// get a reference to the second view controller
let mapController = segue.destination as! MapController
// set a variable in the second view controller with the data to pass
mapController.receivedData = "Hello"
}
func get_data_from_url(_ link:String)
{
let url:URL = URL(string: link)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "GET"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let task = session.dataTask(with: request as URLRequest, completionHandler: {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else {
return
}
self.extract_json(data!)
})
task.resume()
}
func extract_json(_ data: Data)
{
let json: Any?
do
{
json = try JSONSerialization.jsonObject(with: data, options: [])
}
catch
{
return
}
guard let data_list = json as? NSArray else
{
return
}
if let garages_list = json as? NSArray
{
let locations: NSMutableArray = NSMutableArray()
for i in 0 ..< data_list.count
/*{
print(TableData)
if let garage_obj = garages_list[i] as? NSDictionary
{
if let garage_name = garage_obj["GName"] as? String
{
if let garage_address = garage_obj["Address"] as? String
{
if let garage_code = garage_obj["Count"] as? String
{
if let garage_cap = garage_obj["Capacity"] as? String
{
TableData.append(garage_name + "\n"
+ garage_address + " [" + garage_code + "/" + garage_cap+"]")
garagedata.append(garage_name + "\n"
+ garage_address + " [" + garage_code + "/" + garage_cap+"]")
}
}
}
}
}}*/
{
let location = GarageModel()
if let garage_obj = garages_list[i] as? NSDictionary
{
//the following insures none of the JsonElement values are nil through optional binding
if let name = garage_obj["GName"] as? String,
let address = garage_obj["Address"] as? String,
let latitude = garage_obj["Latitude"] as? String,
let longitude = garage_obj["Longitude"] as? String,
let count = garage_obj["Count"] as? String
{
location.name = name
location.address = address
location.latitude = latitude
location.longitude = longitude
location.count = count
}
locations.add(location)
print(locations)
}
}}
DispatchQueue.main.async(execute: {self.do_table_refresh()})
}
func do_table_refresh()
{
self.tableView.reloadData()
}
}
GarageModel：
类GarageModel：NSObject {
//properties
var name: String?
var address: String?
var latitude: String?
var longitude: String?
var count: String?
var capacity: String?
//empty constructor
override init()
{
}
//construct with @name, @address, @latitude, and @longitude parameters
init(name: String, address: String, latitude: String, longitude: String, count: String, capacity: String) {
self.name = name
self.address = address
self.latitude = latitude
self.longitude = longitude
self.count = count
self.capacity = capacity
}
//prints object's current state
override var description: String {
return "Name: \(name), Address: \(address), Latitude: \(latitude), Longitude: \(longitude), Count: \(count), Capacity: \(capacity)"
}
}
我为了审美/测试目的而对一些引脚进行了硬编码，但我没有动态显示这些引脚。
地图控制器：
类MapController：UIViewController {
@IBOutlet weak var mapView: MKMapView!
var receivedData = ""
override func viewDidLoad() {
super.viewDidLoad()
print(receivedData)
let latitude: CLLocationDegrees = 39.173294
let longitude: CLLocationDegrees = -86.520244
let latitude2: CLLocationDegrees = 39.163589
let longitude2: CLLocationDegrees = -86.526266
let latitude3: CLLocationDegrees = 39.167250
let longitude3: CLLocationDegrees = -86.515059
let latDelta: CLLocationDegrees = 0.05
let lonDelta: CLLocationDegrees = 0.05
let span = MKCoordinateSpan(latitudeDelta: latDelta, longitudeDelta: lonDelta)
let location = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
let location2 = CLLocationCoordinate2D(latitude: latitude2, longitude: longitude2)
let location3 = CLLocationCoordinate2D(latitude: latitude3, longitude: longitude3)
let region = MKCoordinateRegion(center: location, span: span)
mapView.setRegion(region, animated: true)
let garage1 = MKPointAnnotation()
garage1.title = "Fee Lane Parking Garage"
garage1.subtitle = "Count XX/150 \n 11th and Fee"
garage1.coordinate = location
mapView.addAnnotation(garage1)
let garage2 = MKPointAnnotation()
garage2.title = "Henderson Parking Garage"
garage2.subtitle = "Count XX/150 Fess and Atwater"
garage2.coordinate = location2
mapView.addAnnotation(garage2)
let garage3 = MKPointAnnotation()
garage3.title = "Jordan Parking Garage"
garage3.subtitle = "Count XX/150 North Jordan Street"
garage3.coordinate = location3
mapView.addAnnotation(garage3)
}
}