我在这里有这个代码：
for (int i=0; i<N; i++)
{
pid = fork();
if (pid == -1) { // handle error }
else if (pid == 0) {
// son process (NO FORK INSIDE THIS ELSE IF!)
}
else { // parent process
wait(NULL);
exit(0);
}
}
}
我的代码运行了大约3秒钟，然后它就像我不能再刷卡一样挂断（还有另一个用于滑动的脚本）。然后大约5秒后，我的应用程序崩溃了。那有什么不对？
编辑代码
using UnityEngine;
using Assets.Helpers; //DONT COPY
using System;
using System.Collections;
public class TileManager : MonoBehaviour {
[SerializeField]
private Settings _settings;
[SerializeField]
private Transform target;
[SerializeField]
private Texture2D texture;
private GameObject tile;
[SerializeField]//DONT COPY
private GameObject service;//DONT COPY
private float oldLat = 0f, oldLon = 0f;
private float lat = 0f, lon = 0f;
public PokemonManager pokeManager;
public float getLat {
get {
return lat;
}
}
public float getLon {
get {
return lon;
}
}
IEnumerator Start()
{
while (!Input.location.isEnabledByUser) {
print ("Activate gps");
yield return new WaitForSeconds (1f);
}
Debug.Log ("1");
Input.location.Start(10f, 5f);
int maxWait = 20;
while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
{
yield return new WaitForSeconds(1);
maxWait--;
Debug.Log ("2");
}
if (maxWait < 1)
{
print("Timed out");
yield break;
}
if (Input.location.status == LocationServiceStatus.Failed)
{
print("Unable to determine device location");
yield break;
}
else
{
print("Location: " + Input.location.lastData.latitude + " " + Input.location.lastData.longitude + " " + Input.location.lastData.altitude + " " + Input.location.lastData.horizontalAccuracy + " " + Input.location.lastData.timestamp);
}
lat = Input.location.lastData.latitude;
lon = Input.location.lastData.longitude;
StartCoroutine (loadTiles (_settings.zoom));
while (Input.location.isEnabledByUser) {
yield return new WaitForSeconds (1f);
}
yield return StartCoroutine (Start ());
yield break;
}
public IEnumerator loadTiles(int zoom) {
int size = _settings.size;
string key = _settings.key;
string style = _settings.style;
lat = Input.location.lastData.latitude;
lon = Input.location.lastData.longitude;
string url = String.Format ("https://api.mapbox.com/v4/mapbox.{5}/{0},{1},{2}/{3}x{3}@2x.png?access_token={4}", lon, lat, zoom, size, key, style);
WWW www = new WWW (url);
yield return www;
texture = www.texture;
if (tile == null) {
tile = GameObject.CreatePrimitive (PrimitiveType.Plane);
tile.name = "Tile " + lat + "" + lon;
tile.transform.localScale = Vector3.one * _settings.scale;
tile.GetComponent<Renderer> ().material = _settings.material;
tile.transform.parent = transform;
}
if (oldLat != 0 && oldLon != 0) {
float x, y;
Vector3 position = Vector3.zero;
geodeticOffsetInv (lat * Mathf.Deg2Rad, lon * Mathf.Deg2Rad, oldLat * Mathf.Deg2Rad, oldLon * Mathf.Deg2Rad, out x, out y);
if ((oldLat - lat) < 0 && (oldLon - lon) > 0 || (oldLat - lat) > 0 && (oldLon - lon) < 0) {
position = new Vector3 (x, .5f, y);
} else {
position = new Vector3 (-x, .5f, -y);
}
position.x *= 0.300122f;
position.z *= 0.123043f;
target.position = position;
Debug.Log ("called");
/*float[] ll = px (lat, lon, _settings.zoom);
float[] oll = px (oldLat, oldLon, _settings.zoom);
x = ll [0] - oll [0];
y = ll [0] - oll [0];
float ps = 10 * _settings.scale / _settings.size;
x *= ps;
y *= ps;
Debug.Log (x + " / " + y);*/
}
pokeManager.UpdatePokemonPosition ();
tile.GetComponent<Renderer> ().material.mainTexture = texture;
yield return new WaitForSeconds (1f);
oldLat = lat;
oldLon = lon;
while (oldLat == lat && oldLon == lon) {
lat = Input.location.lastData.latitude;
lon = Input.location.lastData.longitude;
yield return new WaitForSeconds (0.5f);
}
yield return new WaitUntil ( () => (oldLat != lat || oldLon != lon) );
yield return StartCoroutine (loadTiles (_settings.zoom));
yield break;
}
/*float[] px (float lat, float lon, int zoom) {
float d = (_settings.size / 2 * Mathf.Pow (2, _settings.zoom));
float f = Mathf.Min(Mathf.Max(Mathf.Sin(Mathf.Deg2Rad * lat), -0.9999f), 0.9999f);
float x = Mathf.Round(d + lon * (_settings.size / 360 * Mathf.Pow (2, _settings.zoom)));
float y = Mathf.Round(d + 0.5f * Mathf.Log((1 + f) / (1 - f)) * (-(_settings.size / (2 * Mathf.PI) * Mathf.Pow (2, _settings.zoom))));
float[] result = new float[2];
result [0] = x;
result [1] = y;
return result;
}*/
//SOURCE: http://stackoverflow.com/questions/4953150/convert-lat-longs-to-x-y-co-ordinates
float GD_semiMajorAxis = 6378137.000000f;
float GD_TranMercB = 6356752.314245f;
float GD_geocentF = 0.003352810664f;
void geodeticOffsetInv( float refLat, float refLon,
float lat, float lon,
out float xOffset, out float yOffset )
{
float a = GD_semiMajorAxis;
float b = GD_TranMercB;
float f = GD_geocentF;
float L = lon - refLon;
float U1 = Mathf.Atan((1-f) * Mathf.Tan(refLat));
float U2 = Mathf.Atan((1-f) * Mathf.Tan(lat));
float sinU1 = Mathf.Sin(U1);
float cosU1 = Mathf.Cos(U1);
float sinU2 = Mathf.Sin(U2);
float cosU2 = Mathf.Cos(U2);
float lambda = L;
float lambdaP;
float sinSigma;
float sigma;
float cosSigma;
float cosSqAlpha;
float cos2SigmaM;
float sinLambda;
float cosLambda;
float sinAlpha;
int iterLimit = 100;
do {
sinLambda = Mathf.Sin(lambda);
cosLambda = Mathf.Cos(lambda);
sinSigma = Mathf.Sqrt((cosU2*sinLambda) * (cosU2*sinLambda) +
(cosU1*sinU2-sinU1*cosU2*cosLambda) *
(cosU1*sinU2-sinU1*cosU2*cosLambda) );
if (sinSigma==0)
{
xOffset = 0.0f;
yOffset = 0.0f;
return ; // co-incident points
}
cosSigma = sinU1*sinU2 + cosU1*cosU2*cosLambda;
sigma = Mathf.Atan2(sinSigma, cosSigma);
sinAlpha = cosU1 * cosU2 * sinLambda / sinSigma;
cosSqAlpha = 1 - sinAlpha*sinAlpha;
cos2SigmaM = cosSigma - 2*sinU1*sinU2/cosSqAlpha;
if (cos2SigmaM != cos2SigmaM) //isNaN
{
cos2SigmaM = 0; // equatorial line: cosSqAlpha=0 (ยง6)
}
float C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
lambdaP = lambda;
lambda = L + (1-C) * f * sinAlpha *
(sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
} while (Mathf.Abs(lambda-lambdaP) > 1e-12 && --iterLimit>0);
if (iterLimit==0)
{
xOffset = 0.0f;
yOffset = 0.0f;
return; // formula failed to converge
}
float uSq = cosSqAlpha * (a*a - b*b) / (b*b);
float A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
float B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
float deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
float s = b*A*(sigma-deltaSigma);
float bearing = Mathf.Atan2(cosU2*sinLambda, cosU1*sinU2-sinU1*cosU2*cosLambda);
xOffset = Mathf.Sin(bearing)*s;
yOffset = Mathf.Cos(bearing)*s;
}
void Update() {
service.SetActive (!Input.location.isEnabledByUser);//DONT COPY
target.position = Vector3.Lerp (target.position, new Vector3 (0,.5f, 0), 2.0f * Time.deltaTime);
Debug.Log ("lerped");
}
[Serializable]
public class Settings {
[SerializeField]
public Vector2 centerPosition;
[SerializeField]
public Material material;
[SerializeField]
public int zoom = 18;
[SerializeField]
public int size = 640;
[SerializeField]
public float scale = 1f;
[SerializeField]
public int range = 1;
[SerializeField]
public string key = "KEY_HERE";
[SerializeField]
public string style = "emerald";
}
答案 0 :(得分：1)
你正在进入无限循环。
问题在于：
yield return StartCoroutine (Start ());
当你执行yield return StartCoroutine (Start ())时，它会启动新的协同程序，然后等待以便旧程序完成（这将永远不会发生）然后它将启动另一个corutine而第一个正在运行
yield break;之后的yield return StartCoroutine (Start ()) 甚至会被调用。您可以在Debug.LogWarning("Finished coroutine!");之后添加yield break;来证明这一点。 <{1}}消息永远不会显示。
这里最大的问题是那些协同程序实际上都没有停止。他们Debug.Log然后开始另一个然后等待那个完成然后再开始另一个。 由于这个原因，您可以轻松地运行数千个协同程序。
要解决此问题需要做两件事：
1 。删除yield以便协程可以退出。
因此，请使用yield return代替StartCoroutine (Start ());。
2 。在yield return StartCoroutine (Start ())之前输入yield return null;。你必须这样做，因为如果StartCoroutine (Start ());协程中的所有逻辑（例如Start()）都无法运行，那么就不会产生/等待，你将再次获得无限循环。
为您的while (Input.location.isEnabledByUser)协程做同样的事情。