本文介绍了快速将String转换为CLLocationCoordinate2D的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
使用Firebase作为后端,我得到了一系列的经纬度坐标字符串,如何将它们转换为CLLocationCoordinate2D以便可以将其用于注释?
这是每次更新后都会从Firebase获取信息的代码
using Firebase as my backend, I've got a series of strings that are latitude and longitude coordinates, how can I convert them to CLLocationCoordinate2D so that I can use them for annotations?Here is the code that gets the info from Firebase every time its updated
var UpdateRef = Firebase(url:"https://ici.firebaseio.com/users")
UpdateRef.observeEventType(.ChildChanged, withBlock: { (snapshot) in
let MomentaryLatitude = snapshot.value["latitude"] as? String
let MomentaryLongitude = snapshot.value["longitude"] as? String
let ID = snapshot.value["ID"] as? String
println("\(MomentaryLatitude)")
var Coordinates = CLLocationCoordinate2D(latitude: MomentaryLatitude as
CLLocationDegrees, longitude: MomentaryLongitude as CLLocationDegrees)
}
最后一行不起作用,应该改用什么?
The last line doesn't work, what should I use instead?
推荐答案
使用 doubleValue
属性:
let MomentaryLatitude = (snapshot.value["latitude"] as NSString).doubleValue
let MomentaryLongitude = (snapshot.value["longitude"] as NSString).doubleValue
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