自定义单元格向所有位置发送一个坐标，

Question

我有一个ViewViewer里面有一个tableview，它创建一个包含我的json信息的自定义单元格，当单元格被录制时，它将信息发送到另一个视图，地图和注释上的位置名称。我的问题是细胞发送的信息，但在地图上显示每个细胞挖掘相同的纬度和经度坐标，我似乎无法理解为什么。

以下是我有：

这是我的自定义单元格视图控制器：

import UIKit 

class BusinessImgTableViewCell: UITableViewCell { 

@IBOutlet weak var businessImg:  UIImageView! 

@IBOutlet weak var businessNameLbl: UILabel! 
@IBOutlet weak var distanceLbl:  UILabel! 


override func awakeFromNib() { 
    super.awakeFromNib() 



    let view = UIView(frame: businessImg.frame) 
    let gradient = CAGradientLayer() 
    let arrayColors:Array<AnyObject> = [UIColor.clear.cgColor, UIColor.black.cgColor] 

    gradient.frame = view.frame 
    gradient.locations = [0.0, 1.0] 
    gradient.colors = arrayColors 


    view.layer.insertSublayer(gradient, at: 0) 
    businessImg.addSubview(view) 
    businessImg.bringSubview(toFront: view) 
    // Initialization code 
} 

override func setSelected(_ selected: Bool, animated: Bool) { 
    super.setSelected(selected, animated: animated) 

    // Configure the view for the selected state 
} 

} 

这是viewContoller与实现代码如下信息[因为我知道这个问题是不会增加JSON不存在]：

class SearchViewController: UIViewController, CLLocationManagerDelegate, UITableViewDelegate, UITableViewDataSource{ 


@IBOutlet weak var businessTableView: UITableView! 
@IBOutlet weak var menuBTN:   UIBarButtonItem! 

       var businessName:  String! 
       var currentLocation: CLLocationCoordinate2D? 




var BusinessInfo = [Business]()  

var locationManager = CLLocationManager() 


override func viewDidLoad() { 
    super.viewDidLoad() 


    self.locationManager.requestAlwaysAuthorization() 
    self.locationManager.requestWhenInUseAuthorization() 

    if CLLocationManager.locationServicesEnabled() { 

     locationManager.delegate = self 
     locationManager.desiredAccuracy = kCLLocationAccuracyBest 
     locationManager.requestLocation() 



    } 

    businessTableView.delegate = self 
    businessTableView.dataSource = self 

    // Do any additional setup after loading the view. 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 



struct Business { 

    let name: String 
    let image: NSURL 
    let city: String 
    let distance: String 
    let businessLoc: CLLocationCoordinate2D 

} 


func locationManager(_ manager: CLLocationManager, didFailWithError error: Error){ 

    // Handle errors here 
} 

FUNC的tableView（_的tableView：UITableView的，numberOfRowsInSection部的：int） - >内部{ // #warning后不完全implemen塔季翁，返回的行数 返回BusinessInfo.count }

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! BusinessImgTableViewCell 

    let businessInformation = BusinessInfo[indexPath.row] 
    let imgdirectory = businessInformation.image 

    let urlString: URL = imgdirectory as URL 
    let data = try? Data(contentsOf: urlString) 

    let myDistance = Double(businessInformation.distance) 

     cell.businessImg.image = UIImage(data: data!) 
     cell.businessNameLbl.text = businessInformation.name 
     cell.distanceLbl.text = String(format: "%.2f", myDistance!) + " mi." 
     cell.distanceLbl.sizeToFit() 
     cell.businessNameLbl.sizeToFit() 
     currentLocation = businessInformation.businessLoc 



    return cell 
} 

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 

    let indexPath = tableView.indexPathForSelectedRow 
    let currentCell = tableView.cellForRow(at: indexPath!) as! BusinessImgTableViewCell 


    let storyboard = UIStoryboard(name: "Main", bundle: nil) 
    let mydestination = storyboard.instantiateViewController(withIdentifier: "businessInfoView") as! BusinessInfoViewController 

    mydestination.businessCoor = currentLocation 
    mydestination.businessName = currentCell.businessNameLbl.text 
    self.navigationController!.pushViewController(mydestination, animated: true) 



} 

，这是示出了地图

class BusinessInfoViewController: UIViewController, MKMapViewDelegate { 

@IBOutlet weak var businessLoc: MKMapView! 
@IBOutlet weak var backBTN: UIBarButtonItem! 

@IBOutlet weak var backbtn: UIButton! 

var businessCoor: CLLocationCoordinate2D! 

    var businessName: String! 





override func viewDidLoad() { 
    super.viewDidLoad() 



    let initialLocation = CLLocationCoordinate2DMake(businessCoor.latitude, businessCoor.longitude) 

    let span = MKCoordinateSpanMake(0.01, 0.01) 
    let region = MKCoordinateRegionMake(initialLocation, span) 

    businessLoc.setRegion(region, animated: true) 

    let annotation = MKPointAnnotation() 
    annotation.coordinate = initialLocation 
    annotation.title = businessName 

    businessLoc.addAnnotation(annotation) 

    self.businessLoc.delegate = self 


// Do any additional setup after loading the view. 
} 

Answer 1

在didSelectRowAt正在使用的属性currentLocation，其位置为视图由cellForRowAt:提供的最后一个单元格。什么，你需要做的是在访问indexPath.row

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 

    let indexPath = tableView.indexPathForSelectedRow 
    let currentCell = tableView.cellForRow(at: indexPath!) as! BusinessImgTableViewCell 


    let storyboard = UIStoryboard(name: "Main", bundle: nil) 
    let mydestination = storyboard.instantiateViewController(withIdentifier: "businessInfoView") as! BusinessInfoViewController 
    let business = BusinessInfo[indexPath.row] 
    mydestination.businessCoor = business.businessLoc 
    mydestination.businessName = business.name 
    self.navigationController!.pushViewController(mydestination, animated: true) 

} 

的BusinessInfo阵列FYI你的阵列应该是businessInfo，不BusinessInfo - 变量，常量和属性应该用小写字母，而不是一个大写字母开头。