我试图让我的代码拿起用户的当前位置并将其发送到服务器。当我运行我的代码时,LocationManager
函数似乎仅在startload
函数中的所有内容都完成后触发。我在将数据发送到服务器之前尝试获取用户的位置。
class ViewController: .....
var currentLoc = "0"
[...]
func startload(place: String){ // Starts the process, send recording data and location to node
// GETS LOCATION
print(place)
locationManager.requestWhenInUseAuthorization()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestLocation()
print("Just req location")
// GETS LOCATION
// SENDS REQUEST
// create the request & response
let request = NSMutableURLRequest(URL: NSURL(string: "https://4890adf2.ngrok.io/ios")!, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 5)
var response: NSURLResponse?
// create some JSON data and configure the request
print("preping json")
let jsonString = "json={\"location\":\"\(currentLoc)\", \"Place\": \" \(place) \"}"
request.HTTPBody = jsonString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPMethod = "POST"
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
// send the request
print("Sending the request")
do{
let data = try NSURLConnection.sendSynchronousRequest(request, returningResponse: &response)
let datastring = NSString(data: data, encoding:NSUTF8StringEncoding)
print("Datastring: \(datastring!)")
} catch let error {
print(error)
}
// look at the response
//print("The response: \(response)")
if let httpResponse = response as? NSHTTPURLResponse {
print("HTTP response: \(httpResponse.statusCode)")
} else {
print("No HTTP response")
}
// SENDS REQUEST
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Inside LocationManager")
if let location = locations.first {
currentLoc = String(location)
} else {
// ...
}
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("Error finding location: \(error.localizedDescription)")
}
我尝试在sleep()
之后添加locationManager.requestLocation()
,看看我是否可以尝试暂停执行,直到locationManager
功能被解雇,但即使在睡觉时它仍然没有&#39} ; t触发器。
控制台输出如下:
First hit
restaurant
Just req location
preping json
Sending the request
Datastring: HTTP 200
HTTP response: 200
Inside LocationManager
答案 0 :(得分:1)
我认为你弄错了。 LocationManager
是一个异步API,一旦有需要告诉你,它就会让你回调委托方法。
不要按顺序编写程序,因为它会立即为您提供数据。
按照LocationManager
实施的方式将您的代码与iOS对齐,然后在didUpdateLocations
API中移动您的服务器调用。 请注意,此方法会根据位置更改被多次调用,因此,您可能需要仔细检查何时以及要将哪些数据发送到服务器。