ios - 基于标准位置的 iOS 应用程序在暂停 IOS 后未唤醒
<p><p>我正在开发一个基于位置的应用程序，它应该总是获取用户位置。我使用标准位置服务。但问题是，即使我们移动到其他位置，应用程序在后台保持空闲一段时间后也不会获取坐标。根据苹果文档，当一个新位置到达时，应用程序应该会自动唤醒，但这里不会发生这种情况。我正在共享代码并用于获取我的 plist 的位置和屏幕截图。 </p>
<pre><code>class SALocation: NSObject,CLLocationManagerDelegate
{
static let sharedInstance : SALocation = SALocation()
var locationManager : CLLocationManager!
var location : CLLocation!
var address : String!
var latitude : NSString?
var longitude : NSString?
var isAdderssLoaded : Bool = false
var locdictionary : NSMutableDictionary = NSMutableDictionary()
func startLocationManager()
{
if self.locationManager == nil
{
self.locationManager = CLLocationManager()
if CLLocationManager.locationServicesEnabled(){
print("location service enabled")
}
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.distanceFilter = kCLDistanceFilterNone
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
if ( Float (UIDevice.currentDevice().systemVersion) >= 9) {
if #available(iOS 9.0, *) {
self.locationManager.allowsBackgroundLocationUpdates = true
} else {
// Fallback on earlier versions
};
}
self.locationManager.startUpdatingLocation()
//self.locationManager.stopMonitoringSignificantLocationChanges()
}
else
{
self.locationManager.startUpdatingLocation()
}
}
// MARK: CLLocationManagerDelegate
func locationManager(manager: CLLocationManager, didFailWithError error: NSError)
{
UIAlertView(title:"Alert", message:error.description, delegate: nil, cancelButtonTitle:nil, otherButtonTitles:"Ok").show()
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: )
{
if locations.count > 0
{
self.location = locations
/* storing date and location to plist
*/
let datenow = NSDate()
let dateformatternow = NSDateFormatter ()
dateformatternow.dateFormat = "yyyyMMdd HH:mm:ss"
let timenow:NSString = dateformatternow.stringFromDate(datenow)
let documetsdirectorypath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last
latitude = NSString(format: "%f",self.location.coordinate.latitude)
longitude = NSString (format: "%f",self.location.coordinate.longitude)
let latlong : NSString = NSString(format:"%@~%@",latitude!,longitude!)
NSUserDefaults.standardUserDefaults().setObject(latlong, forKey: "latlong")
let aFilePath =NSString(format: "%@/location.plist",documetsdirectorypath!)
locdictionary.setObject(latlong, forKey: timenow as String)
locdictionary.writeToFile(aFilePath as String, atomically: true)
///////////// ||storing date and location to plist code ends here||\\\\\\
// self.getAddressFromLocation(locations )
// if (NSUserDefaults.standardUserDefaults().objectForKey(SettingAppRefresh) != nil)
// {
// if (NSUserDefaults.standardUserDefaults().objectForKey(SettingAppRefresh) as! NSString).isEqualToString(FalseString)
// {
// // self.locationManager.stopUpdatingLocation()
// }
// }
}
}
}
</code></pre>
<p>我在这里所做的只是获取位置并将其写入 plist 文件。这适用于前景，背景等。但是当我让应用程序闲置 20 分钟时，即使我在应用程序暂停时移动到其他位置，也不会获取位置</p>
<p> <a href="/image/vRfok.png" rel="noreferrer noopener nofollow"><img src="/image/vRfok.png" alt="enter image description here"/></a> </p>
<p>功能选项卡如下所示 <a href="/image/nEMA2.png" rel="noreferrer noopener nofollow"><img src="/image/nEMA2.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>要在后台启动位置，您必须从以下路径启动后台服务</p>
<blockquote>
<p>Click on your name -> Click on your app name (target) -> goto capabilities -> find the background mode -> enable the location update mode</p>
</blockquote>
<p> <a href="/image/SLbgx.png" rel="noreferrer noopener nofollow"><img src="/image/SLbgx.png" alt="enter image description here"/></a> </p>
<p>我不确定你是否开始这样做，因为你没有放任何关于这个的截图。</p>
<p>还要检查您的用户是否在设置中启动了后台刷新。请参阅下面的链接。</p>
<p> <a href="https://stackoverflow.com/questions/20239829/background-app-refresh-checking-enabling-and-disabling-programatically-for-whol" rel="noreferrer noopener nofollow">Background App Refresh checking, enabling and disabling programatically for whole device and for each particular application in iOS 7</a> </p>
<p><strong>更新::</strong>
用于背景中的位置更新链接( objective-c )</p>
<p> <a href="http://www.creativeworkline.com/2014/12/core-location-manager-ios-8-fetching-location-background/" rel="noreferrer noopener nofollow">http://www.creativeworkline.com/2014/12/core-location-manager-ios-8-fetching-location-background/</a> </p></p>
<p style="font-size: 20px;">关于ios - 基于标准位置的 iOS 应用程序在暂停 IOS 后未唤醒，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/33820328/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/33820328/
</a>
</p>
页:
[1]