需求:獲取經緯度。ios
方案:我自定義了一個類模塊CLLocationModule.swiftgit
備註如下代碼裏 swift
let IS_IOS8 = (UIDevice.currentDevice().systemVersion as NSString).doubleValue >= 8.0ide
最開始的代碼spa
import UIKit代理
import CoreLocationcode
class CLLocationModule: NSObject ,CLLocationManagerDelegate{ip
var latitude:Double?
ci
var longitude:Double?
string
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()// 前臺定位
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 (容許 不容許那個彈出框) 致使不走代理方法didUpdateLocations 最後查閱網頁 知道
(a)locManager沒定義爲全局變量
(b)自定義的CLLocationModule.swift這個類 因爲ARC的緣故 自動釋放了
針對以上(a)問題的解決辦法爲自定義類CLLocationModule.swift中將var locManager = CLLocationManager() 改成全局變量
var locManager: CLLocationManager!
locManager = CLLocationManager()
針對以上(b)問題的解決方案有兩種
(1)外部調用時改成:(改成強引用)
var aCLLocationModule = CLLocationModule()
self.aCLLocationModule.GetLatitudeLongitudeAndCity()
(2)自定義的類CLLocationModule.swift改成單例
//單例
private static let aSharedInstance: CLLocationModule = CLLocationModule()
private override init() {}
class func sharedInstance() -> CLLocationModule {
return aSharedInstance
}
外部調用時改成:
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()// 前臺定位
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()// 前臺定位
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()