我试图用下面的代码显示保存在Mysql中的多个位置。数据正在加载，但我不知道如何根据纬度和经度显示多个位置。
Mysql通过PHP文件连接到应用程序。
这是我的代码，我从NSObject调用的部分：
func downloadItems() {
// the download function
// return the nsuserdefaults which hold the lati and longi from the notification table
UserDefaults.standard.string(forKey: "test");
let myUrl = UserDefaults.standard.string(forKey: "test");
let urlPath: String = myUrl!
let url: URL = URL(string: urlPath)!
let defaultSession = Foundation.URLSession(configuration: URLSessionConfiguration.default)
let task = defaultSession.dataTask(with: url) { (data, response, error) in
if error != nil {
print("Failed to download data")
}else {
print("Data downloaded")
self.parseJSON(data!)
}
}
task.resume()
}
func parseJSON(_ data:Data) {
var jsonResult = NSArray()
do{
jsonResult = try JSONSerialization.jsonObject(with: data, options:JSONSerialization.ReadingOptions.allowFragments) as! NSArray
} catch let error as NSError {
print(error)
}
var jsonElement = NSDictionary()
let locations = NSMutableArray()
for i in 0 ..< jsonResult.count
{
jsonElement = jsonResult[i] as! NSDictionary
let location = LocationModel()
//the following insures none of the JsonElement values are nil through optional binding
if let evIdL = jsonElement["id"] as? String,
let evUserNameL = jsonElement["username"] as? String,
let evNotikindL = jsonElement["notikind"] as? String,
let evLatiL = jsonElement["lati"] as? String,
let evLongiL = jsonElement["longi"] as? String,
let evLocatL = jsonElement["locat"] as? String,
let evTimedateL = jsonElement["timedate"] as? String,
let evDistanceL = jsonElement["distance"] as? String
{
location.evId = evIdL
location.evUsername = evUserNameL
location.evNotikind = evNotikindL
location.evLati = evLatiL
location.evLongi = evLongiL
location.evLocat = evDistanceL
location.evTimedate = evTimedateL
location.evDisatnce = evDistanceL
location.evLocat = evLocatL
}
locations.add(location)
}
DispatchQueue.main.async(execute: { () -> Void in
self.delegate.itemsDownloaded(items: locations)
})
}
}
我不知道如何在地图上标出几个位置。
最佳答案
试试这个代码。。。。
var locations = NSMutableArray()
var mapView = GMSMapView()
for i in 0..< location.count{
let obj = location[i]
lat = obj["lati"] as? Double
lng = obj["longi"] as? Double
let markerPoint = GMSMarker()
markerPoint.position = CLLocationCoordinate2D(latitude: lat!, longitude: lng!)
markerPoint.iconView = self.avtarImage() // Your image name
markerPoint.map = mapView // your mapview object name
markerPoint.zIndex = Int32(i)
markerPoint.infoWindowAnchor = CGPoint(x: 0, y: 0)
markerPoint.accessibilityLabel = String(format: "%d", i)
}