tableview按距离排序swift

我用视图和表视图构建视图混合，我希望我可以通过距离用户位置的距离来排序单元格，我尝试使用distanceFromLoaction方法，但它显示CLLocationCoordinate没有成员距离从Locaiton，还有另一种方法来做到或修复它？tableview按距离排序swift

这是我的阵列结构

import UIKit 
import MapKit 

class tripSpot: NSObject, MKAnnotation{ 
var title: String? 
var coordinate: CLLocationCoordinate2D 
var regionRadius: Double 
var location: String? 
var type: String? 


init(title:String , coordinate: CLLocationCoordinate2D , regionRadius: Double, location: String, type: String){ 
    self.title = title 
    self.coordinate = coordinate 
    self.regionRadius = regionRadius 
    self.location = location 
    self.type = type 
    } 

    }

和我tableviewcode

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
    let cell = tableView.dequeueReusableCellWithIdentifier("MapCell") as! mapTableViewCell 

    self.tripspot.sort({ $0.coordinate.distanceFromLoaction(self.coordinate) < $1.coordinate.distanceInKilometersTo(self.coordinate)}) 
    if searchController.active{ 
    cell.title.text = searchResults[indexPath.row].title 
    cell.location.text = searchResults[indexPath.row].location 
    return cell 
    }else{ 
    cell.title.text = tripspot[indexPath.row].title 
    cell.location.text = tripspot[indexPath.row].location 
    return cell 
    }

感谢您的任何意见。

来源

2016-07-08 Johnny Hsieh

'distanceFromLocation（）'是一个'CLLocation'方法不是一个'CLLocationCoordinate2D'之一。所以你必须把'CLLocationCoordinate2D'对象转换成'CLLocation'（很简单），然后调用'distanceFromLocation（）'。 – Larme

嗨@Larme你能教我如何将CLLocationCoordinate2d变成CLLocation吗？我搜索了所有的stackoverflow，但仍然可以得到它。你。 –

'var clLocationObject = CLLocation（纬度：cllocationCoordinate2D.latitude，经度：cllocationCoordinate2D.longitude）'或类似的东西。 – Larme

import UIKit 
import CoreLocation 

final class Places { 
var title: String? 
var cllocation: CLLocation 
var regionRadius: Double 
var location: String? 
var type: String? 
var distance : Double? 
var coordinate : CLLocationCoordinate2D 

init(title:String , cllocation: CLLocation , regionRadius: Double, location: String, type: String ,distance:Double!,coordinate: CLLocationCoordinate2D){ 
    self.title = title 
    self.cllocation = cllocation 
    self.coordinate = coordinate 
    self.regionRadius = regionRadius 
    self.location = location 
    self.type = type 
    self.distance = distance 
} 


// Function to calculate the distance from given location. 
func calculateDistance(fromLocation: CLLocation?) { 

    distance = cllocation.distanceFromLocation(fromLocation!) 
} 
} 


let fromLocation:CLLocation = CLLocation(latitude: 24.186965, longitude: 120.633268) 

var places:[Places] = [ 


Places(title: "Title1", cllocation: CLLocation(latitude :24.181143, longitude: 120.593158), regionRadius: 300.0, location: "LocationTitle1", type: "Food",distance : CLLocation(latitude :24.181143, longitude: 120.593158).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.181143,120.593158)), 
Places(title: "Title2", cllocation: CLLocation(latitude:24.14289,longitude:120.679901), regionRadius:150.0, location:"LocationTitle2",type: "Food",distance : CLLocation(latitude:24.14289,longitude:120.679901).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.14289,120.679901)), 
Places(title: "Title3", cllocation: CLLocation(latitude : 24.180407, longitude:120.645086), regionRadius: 300.0, location:"LocationTitle3", type: "Food",distance : CLLocation(latitude : 24.180407, longitude:120.645086).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.180407,120.645086)), 
Places(title: "Title4", cllocation: CLLocation(latitude: 24.149062,longitude:120.684891), regionRadius: 300.0, location: "LocationTitle4", type: "Food",distance : CLLocation(latitude: 24.149062,longitude:120.684891).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.149062,120.684891)), 
Places(title: "Title5", cllocation: CLLocation(latitude:24.138598,longitude:120.672096), regionRadius:150.0, location:"LocationTitle5",type: "Food",distance : CLLocation(latitude:24.138598,longitude:120.672096).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.138598,120.672096)), 
Places(title: "Title6", cllocation: CLLocation(latitude :24.1333434,longitude:120.680744), regionRadius:100.0, location:"LocationtTitle6",type: "Culture",distance : CLLocation(latitude :24.1333434,longitude:120.680744).distanceFromLocation(fromLocation),coordinate : CLLocationCoordinate2DMake(24.1333434,120.680744)) 

] 

for k in 0...(places.count-1) { 
     print("\(places[k].distance)") 
} 
for place in places { 
     place.calculateDistance(fromLocation) // Replace YOUR_LOCATION   with the location you want to calculate the distance to. 
} 


    places.sortInPlace({ $0.distance < $1.distance }) 

    for n in 0...(places.count-1) { 
    print("\(places[n].distance)") 
    }

输出：

//before sort array 
Optional(4126.1395817058) 
Optional(6803.61030342841) 
Optional(1403.39181021788) 
Optional(6718.92222011204) 
Optional(6653.47447563344) 
Optional(7651.92757760459) 


//after sort array 
Optional(1403.39181021788) 
Optional(4126.1395817058) 
Optional(6653.47447563344) 
Optional(6718.92222011204) 
Optional(6803.61030342841) 
Optional(7651.92757760459)

来源

2016-07-08 09:35:55

我使用你的方法，但仍然不能符合，你可以更具体吗？谢谢。 –

你无法比较距离吗？ –

我不知道如何获得距离两个CLLocationCooridinate2D –

tableview按距离排序swift

回答

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