嗨，我有一个应用程序，它在解析服务器中存储带有名称的地理点，我能够将数据检索到控制台，但我无法用它们填充 tableView。我怎么能这样做呢？谢谢!
这是我用来存储数据的代码:
let geoPoint = PFObject(className: "location")
geoPoint["location"] = activePlace
geoPoint["spot"] = places
geoPoint.saveInBackgroundWithBlock { (succes, error) -> Void in
print("place has been saved")
}
这是我用来检索它的代码:
let query = PFQuery(className: "location")
query.findObjectsInBackgroundWithBlock { (object, error) in
if error != nil {
print(error)
}else {
print(object)
self.tableView.reloadData()
}
}
这就是我确定我的 tableView 的方式:
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = places[indexPath.row]["name"]
return cell
}
这就是“地点”的确定方式:
var places = [Dictionary<String,String>()]
这是我在解析服务器上的内容:
感谢您的帮助!
编辑:这是我在控制台中得到的:
Optional([<location: 0x7fd383e34940, objectId: K4E1Dn0qqV, localId: (null)> {
ACL = "<PFACL: 0x7fd383f2e070>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
}
);
}, <location: 0x7fd383f30600, objectId: D4tdDJcA4x, localId: (null)> {
ACL = "<PFACL: 0x7fd383f14370>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
}
);
}, <location: 0x7fd383f328c0, objectId: aEyiGvNmze, localId: (null)> {
ACL = "<PFACL: 0x7fd383f32c00>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
}
);
}, <location: 0x7fd383f32f80, objectId: r9DVe2KJde, localId: (null)> {
ACL = "<PFACL: 0x7fd383f33320>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
}
);
}, <location: 0x7fd383f336a0, objectId: 9LwM4ATHFC, localId: (null)> {
ACL = "<PFACL: 0x7fd383f14140>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
},
{
lat = "37.3246293922446";
lon = "-122.023606373578";
name = other;
}
);
}, <location: 0x7fd383f33c00, objectId: QM8rg2NKNf, localId: (null)> {
ACL = "<PFACL: 0x7fd383f34040>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = place;
},
{
lat = "37.3313521358974";
lon = "-122.030724242466";
name = house;
},
{
lat = "37.3246293922446";
lon = "-122.023606373578";
name = other;
}
);
}, <location: 0x7fd383f343c0, objectId: NjlsykJtTf, localId: (null)> {
ACL = "<PFACL: 0x7fd383f34690>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
}
);
}, <location: 0x7fd383f34a10, objectId: qdOPtRVzew, localId: (null)> {
ACL = "<PFACL: 0x7fd383f34c70>";
location = "-1";
spot = (
);
}, <location: 0x7fd383f34ff0, objectId: DC5ZW7WRNO, localId: (null)> {
ACL = "<PFACL: 0x7fd383f35250>";
location = "-1";
spot = (
);
}, <location: 0x7fd383f355d0, objectId: rCZIaHlceC, localId: (null)> {
ACL = "<PFACL: 0x7fd383f358a0>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
}
);
}, <location: 0x7fd383f35c20, objectId: 2LI1u9KyNt, localId: (null)> {
ACL = "<PFACL: 0x7fd383f35ef0>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
}
);
}, <location: 0x7fd383f36270, objectId: YKd0q9uQcY, localId: (null)> {
ACL = "<PFACL: 0x7fd383f365b0>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
},
{
lat = "37.3263892401666";
lon = "-122.019776452882";
name = "new one";
}
);
}, <location: 0x7fd383f36930, objectId: rGd3ChyOcV, localId: (null)> {
ACL = "<PFACL: 0x7fd383f36d60>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
},
{
lat = "37.3263892401666";
lon = "-122.019776452882";
name = "new one";
},
{
lat = "37.3247014690037";
lon = "-122.020914298787";
name = "mc laren";
}
);
}, <location: 0x7fd383f37110, objectId: aunhPqs1Ww, localId: (null)> {
ACL = "<PFACL: 0x7fd383f375a0>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
},
{
lat = "37.3263892401666";
lon = "-122.019776452882";
name = "new one";
},
{
lat = "37.3247014690037";
lon = "-122.020914298787";
name = "mc laren";
},
{
lat = "37.3246335613548";
lon = "-122.023146659295";
name = boom;
}
);
}, <location: 0x7fd383f37950, objectId: CtWCmwuZHv, localId: (null)> {
ACL = "<PFACL: 0x7fd383f37c60>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
}
);
}, <location: 0x7fd383cc37a0, objectId: AHHsEyrCJk, localId: (null)> {
ACL = "<PFACL: 0x7fd383e228d0>";
location = "-1";
spot = (
{
lat = 90;
lon = 90;
name = "GO to map to add spot";
},
{
lat = "37.3306871385499";
lon = "-122.03026490349";
name = "20405\U201320449 Mariani Ave";
}
);
}])
编辑2:这是整个tableView代码:
import UIKit
import Parse
var rideSpots = [""]
//test start
class Place {
var ACL : String
var location : String
init(ACL : String, location : String) {
self.ACL = ACL
self.location = location
}
}
let places2 : [Place] = []
//test stop
var places = [Dictionary<String,String>()]
var activePlace = -1
class TableViewController: UITableViewController {
@available(iOS 8.0, *)
func companyNameUpdatedAlert(title: String, error: String, indexPath: Int) {
let alert = UIAlertController(title: title, message: error, preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler { (textField) -> Void in
textField.placeholder = "Enter new text"
}
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
let lat = places[indexPath]["lat"]!
let lon = places[indexPath]["lon"]!
places.removeAtIndex(indexPath)
places.insert(["name" : alert.textFields![0].text!, "lat" : lat, "lon" : lon], atIndex: indexPath)
self.tableView.reloadData()
NSUserDefaults.standardUserDefaults().setObject(places, forKey: "places")
NSUserDefaults.standardUserDefaults().synchronize()
}))
self.presentViewController(alert, animated: true, completion: nil)
}
@available(iOS 8.0, *)
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? {
let changeText = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Change spot name" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
self.companyNameUpdatedAlert("Update text", error: "enter text below", indexPath: indexPath.row)
})
/*
let deleteAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
places.removeAtIndex(indexPath.row)
tableView.reloadData()
NSUserDefaults.standardUserDefaults().setObject(places, forKey: "places")
NSUserDefaults.standardUserDefaults().synchronize()
})
*/
return [changeText]
}
override func viewDidLoad() {
super.viewDidLoad()
//retrieve the data from parse start
//first start of test retrieving
let query = PFQuery(className: "location")
query.findObjectsInBackgroundWithBlock { (objects, error) in
if error != nil {
print(error)
}else {
print(object)
for object in (objects)! {
// Retrieve data needed and add to places (example ACL and location)
let ACL : String = object["ACL"] as! String
let location : String = object["location"] as! String
let place : Place = Place(ACL : ACL, location : location)
self.places.append(place)
}
self.tableView.reloadData()
}
}
//end of test retrieving
/*
let query = PFQuery(className: "location")
query.findObjectsInBackgroundWithBlock { (object, error) in
if error != nil {
print(error)
}else {
print(object)
self.tableView.reloadData()
}
}
*/
//retrieve the data from parse stop
if places.count == 1 {
places.removeAtIndex(0)
places.append(["name":"GO to map to add spot","lat":"90","lon":"90"])
}
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
}
}
override func didReceiveMemoryWarning() {
didReceiveMemoryWarning()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = places[indexPath.row]["name"]
return cell
}
override func tableView(tableView: UITableView, willSelectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? {
activePlace = indexPath.row
return indexPath
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "newPlace" {
activePlace = -1
}
}
override func viewWillAppear(animated: Bool) {
tableView.reloadData()
}
}
最佳答案
经过一番审查后，我会创建一个名为地方的对象而不是字典。这样你就可以创建一个对象数组而不是字典，这很奇怪。
class Place {
var ACL : String
var location : String
init(ACL : String, location : String) {
self.ACL = ACL
self.location = location
}
}
添加
var places : [Place] = []
在查询中，而不是仅仅打印对象并重新加载 tableView。每次重新加载时，您的数据源都没有改变。
let query = PFQuery(className: "location")
query.findObjectsInBackgroundWithBlock { (objects, error) in
if error != nil {
print(error)
}else {
print(object)
for object in objects {
// Retrieve data needed and add to places (example ACL and location)
let ACL : String = object["ACL"] as String
let location : String = object["location"] as String
let place : Place = Place(ACL : ACL, location : location)
self.places.append(place)
}
self.tableView.reloadData()
}
}
关于swift - 如何从解析中检索 geoPoints 并将其存储在 tableView 中？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36404257/