需求：獲取經緯度。
方案：我自定義了一個類模塊CLLocationModule.swift
備注以下代碼里
let IS_IOS8 = (UIDevice.currentDevice().systemVersion as NSString).doubleValue >= 8.0
最開始的代碼
import UIKit
import CoreLocation
class CLLocationModule: NSObject ,CLLocationManagerDelegate{
var latitude:Double?
var longitude:Double?
var city:NSString?
func GetLatitudeLongitudeAndCity(){
if CLLocationManager.locationServicesEnabled() == false {
print("此設備不能定位")
return
}
var locManager = CLLocationManager()
locManager.delegate = self
locManager.desiredAccuracy = kCLLocationAccuracyBest
locManager.distanceFilter = 1000.0
//設置定位權限僅ios8有意義
if IS_IOS8 {
locManager.requestWhenInUseAuthorization()// 前台定位
locManager.requestAlwaysAuthorization()
}
locManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
print("緯度：%g",location.coordinate.latitude);
print("經度：%g",location.coordinate.longitude);
latitude = location.coordinate.latitude
longitude = location.coordinate.longitude
self.saveLatitude(latitude!.description)
self.saveLongitude(longitude!.description)
let geocoder: CLGeocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(location) { (placemarks, error) in
if error != nil {
print("reverse geodcode fail: \(error!.localizedDescription)")
return
}
let pm = placemarks! as [CLPlacemark]
if (pm.count > 0){
for placemark :CLPlacemark in placemarks! {
let placemarkDict = placemark.addressDictionary
let placemarkStr = placemarkDict!["State"]
self.city = placemarkStr?.substringToIndex((placemarkStr?.length)!-1)
self.saveCity(self.city!)
}
}else{
print("No Placemarks!")
}
}
}
manager.stopUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didFailWithError error:NSError) {
print("locationManager error");
}
func saveLatitude(latitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(latitude, forKey: "latitude")
defaults.synchronize()
}
func readLatitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let latitude = defaults.objectForKey("latitude") as! NSString
return latitude;
}
func saveLongitude(longitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(longitude, forKey: "longitude")
defaults.synchronize()
}
func readLongitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let longitude = defaults.objectForKey("longitude") as! NSString
return longitude;
}
func saveCity(city: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(city, forKey: "city")
defaults.synchronize()
}
func readCity() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let city = defaults.objectForKey("city") as! NSString
return city;
}
}
外部調用是：
CLLocationModule().GetLatitudeLongitudeAndCity()
結果：定位框一閃而過 （允許 不允許那個彈出框） 導致不走代理方法didUpdateLocations 最后查閱網頁 知道
（a）locManager沒定義為全局變量
（b）自定義的CLLocationModule.swift這個類 由於ARC的緣故 自動釋放了
針對以上（a）問題的解決辦法為自定義類CLLocationModule.swift中將var locManager = CLLocationManager() 改為全局變量
var locManager: CLLocationManager!
locManager = CLLocationManager()
針對以上（b）問題的解決方案有兩種
(1)外部調用時改為：(改為強引用)
var aCLLocationModule = CLLocationModule()
self.aCLLocationModule.GetLatitudeLongitudeAndCity()
(2)自定義的類CLLocationModule.swift改為單例
//單例
private static let aSharedInstance: CLLocationModule = CLLocationModule()
private override init() {}
class func sharedInstance() -> CLLocationModule {
return aSharedInstance
}
外部調用時改為：
CLLocationModule.sharedInstance().GetLatitudeLongitudeAndCity()
成功的代碼附上兩份
(1)單例
import UIKit
import CoreLocation
class CLLocationModule: NSObject ,CLLocationManagerDelegate{
//單例
private static let aSharedInstance: CLLocationModule = CLLocationModule()
private override init() {}
class func sharedInstance() -> CLLocationModule {
return aSharedInstance
}
var locManager: CLLocationManager!
var latitude:Double?
var longitude:Double?
var city:NSString?
func GetLatitudeLongitudeAndCity(){
if CLLocationManager.locationServicesEnabled() == false {
print("此設備不能定位")
return
}
locManager = CLLocationManager()
locManager.delegate = self
locManager.desiredAccuracy = kCLLocationAccuracyBest
locManager.distanceFilter = 1000.0
//設置定位權限僅ios8有意義
if IS_IOS8 {
locManager.requestWhenInUseAuthorization()// 前台定位
locManager.requestAlwaysAuthorization()
}
locManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
print("緯度：%g",location.coordinate.latitude);
print("經度：%g",location.coordinate.longitude);
latitude = location.coordinate.latitude
longitude = location.coordinate.longitude
self.saveLatitude(latitude!.description)
self.saveLongitude(longitude!.description)
let geocoder: CLGeocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(location) { (placemarks, error) in
if error != nil {
print("reverse geodcode fail: \(error!.localizedDescription)")
return
}
let pm = placemarks! as [CLPlacemark]
if (pm.count > 0){
for placemark :CLPlacemark in placemarks! {
let placemarkDict = placemark.addressDictionary
let placemarkStr = placemarkDict!["State"]
self.city = placemarkStr?.substringToIndex((placemarkStr?.length)!-1)
self.saveCity(self.city!)
}
}else{
print("No Placemarks!")
}
}
}
manager.stopUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didFailWithError error:NSError) {
print("locationManager error");
}
func saveLatitude(latitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(latitude, forKey: "latitude")
defaults.synchronize()
}
func readLatitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let latitude = defaults.objectForKey("latitude") as! NSString
return latitude;
}
func saveLongitude(longitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(longitude, forKey: "longitude")
defaults.synchronize()
}
func readLongitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let longitude = defaults.objectForKey("longitude") as! NSString
return longitude;
}
func saveCity(city: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(city, forKey: "city")
defaults.synchronize()
}
func readCity() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let city = defaults.objectForKey("city") as! NSString
return city;
}
}
外部調用：
CLLocationModule.sharedInstance().GetLatitudeLongitudeAndCity()
(2)強引用
import UIKit
import CoreLocation
class CLLocationModule: NSObject ,CLLocationManagerDelegate{
var locManager: CLLocationManager!
var latitude:Double?
var longitude:Double?
var city:NSString?
func GetLatitudeLongitudeAndCity(){
if CLLocationManager.locationServicesEnabled() == false {
print("此設備不能定位")
return
}
locManager = CLLocationManager()
locManager.delegate = self
locManager.desiredAccuracy = kCLLocationAccuracyBest
locManager.distanceFilter = 1000.0
//設置定位權限僅ios8有意義
if IS_IOS8 {
locManager.requestWhenInUseAuthorization()// 前台定位
locManager.requestAlwaysAuthorization()
}
locManager.startUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations {
print("緯度：%g",location.coordinate.latitude);
print("經度：%g",location.coordinate.longitude);
latitude = location.coordinate.latitude
longitude = location.coordinate.longitude
self.saveLatitude(latitude!.description)
self.saveLongitude(longitude!.description)
let geocoder: CLGeocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(location) { (placemarks, error) in
if error != nil {
print("reverse geodcode fail: \(error!.localizedDescription)")
return
}
let pm = placemarks! as [CLPlacemark]
if (pm.count > 0){
for placemark :CLPlacemark in placemarks! {
let placemarkDict = placemark.addressDictionary
let placemarkStr = placemarkDict!["State"]
self.city = placemarkStr?.substringToIndex((placemarkStr?.length)!-1)
self.saveCity(self.city!)
}
}else{
print("No Placemarks!")
}
}
}
manager.stopUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didFailWithError error:NSError) {
print("locationManager error");
}
func saveLatitude(latitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(latitude, forKey: "latitude")
defaults.synchronize()
}
func readLatitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let latitude = defaults.objectForKey("latitude") as! NSString
return latitude;
}
func saveLongitude(longitude: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(longitude, forKey: "longitude")
defaults.synchronize()
}
func readLongitude() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let longitude = defaults.objectForKey("longitude") as! NSString
return longitude;
}
func saveCity(city: NSString) {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(city, forKey: "city")
defaults.synchronize()
}
func readCity() -> NSString {
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
let city = defaults.objectForKey("city") as! NSString
return city;
}
}
外部調用：
var aCLLocationModule = CLLocationModule()
self.aCLLocationModule.GetLatitudeLongitudeAndCity()