ios - 区域监控(地理围栏)会消耗电池电量(iOS)
<p><p>我已经在我的应用中实现了 <code>CLLocationManager</code> 的区域监控功能，它可以工作但它会耗尽我的电池:</p>
<p>-</p>
<p> <a href="/image/qGxQ4.png" rel="noreferrer noopener nofollow"><img src="/image/qGxQ4.png" alt="Image"/></a> </p>
<p>-</p>
<p>应该这样吗？</p>
<p>我的代码:</p>
<p><strong>monitorLocationViewController.m</strong>(请滚动查看完整代码):</p>
<pre><code>-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
//If "allStores"(NSMutableArray) isn't nil - calling "locationChangeHandler" to update monitoring
if (self.allStores!=nil) {
;
}
CLLocation *currentLocation=(CLLocation*);
NSSet *monitoredRegionsSet=self.locationManager.monitoredRegions;
[monitoredRegionsSet enumerateObjectsUsingBlock:^(CLCircularRegion *region, BOOL *stop) {
if () {
;
;
}
}];
}
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
Store *store=;
if (store.alreadySendNotification==NO) {
UILocalNotification *notification=[ init];
notification.alertTitle=@"Arounder";
notification.alertBody=[ address];
[ scheduleLocalNotification:notification];
store.alreadySendNotification=YES;
}
}
//For updating monitoring
-(void)locationChangeHandler
{
//If "allStores"(NSMutableArray) isn't nil
if (self.allStores!=nil) {
//Finding the 20 closest stores to he user's location and adding it to "twentyClosestStores"(NSMutableArray)
;
//Stop monitoring "previousTwentyStores"(NSMutableArray) (20 closest stores before user's locationupdated)
;
//Start monitoring "twentyClosestStores"(NSMutableArray)
;
}
}
//Start monitoring "twentyClosestStores"(NSMutableArray)
-(void)startMonitoringClosestStores
{
//If monitoring isn't availible for "CLCircularRegion"
if (!]) {
NSLog(@"Monitoring is not available for CLCircularRegion class");
return;
}
//Run on all "twentyClosestStores"(NSMutableArray)'s objects
for (Store *currentStore in self.twentyClosestStores) {
//Start monitoring "region"(CLCircularRegion)
;
}
}
//Stop monitoring "previousTwentyStores"(NSMutableArray) (20 closest stores before user's locationupdated)
-(void)stopMonitoringStores
{
//Run on all "monitoredRegions"(NSSet) of "locationManager"(CLLocationManager) objects
for (CLCircularRegion *currentRegion in self.locationManager.monitoredRegions) {
//Stop monitoring "region"(CLCircularRegion)
;
}
}
//Finding a store for region
-(Store*)storeForRegion:(CLCircularRegion*)region
{
//Run on all "allStores"(NSMutableArray)'s objects
for (Store *currentStore in self.allStores) {
//If "currentStore"(Store)'s "circularRegion"'s identifier is equal to "region"(CLCircularRegion)'s identifier
if () {
//Returning "currentStore"(Store)
return currentStore;
}
}
//Store not found - returning nil
NSLog(@"No store found for this region: %f,%f",region.center.latitude,region.center.longitude);
return nil;
}
</code></pre>
<p><strong>AppDelegate.m</strong>:</p>
<pre><code>-(BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.monitorLocationVC=[ init];
self.monitorLocationVC.locationManager=self.locationManager;
;
;
return YES;
}
-(void)configureLocationManager
{
//Initializing locationManager
self.locationManager=[ init];
//setting "locationManager"'s(CLLocationManager) delegate to "self"
self.locationManager.delegate=self.monitorLocationVC;
//Setting "locationManager"'s(CLLocationManager)'s distance filter to none
self.locationManager.distanceFilter=kCLDistanceFilterNone;
//Setting "locationManager"'s(CLLocationManager)'s activityType to navigation
self.locationManager.activityType=CLActivityTypeAutomotiveNavigation;
//setting "locationManager"'s(CLLocationManager) desiredAccuracy to "best"
self.locationManager.desiredAccuracy=kCLLocationAccuracyBestForNavigation;
self.locationManager.pausesLocationUpdatesAutomatically=NO;
//If OS version is 9 or above - setting "allowsBackgroundLocationUpdates" to YES
if ([[ systemVersion] floatValue] >= 9) {
self.locationManager.allowsBackgroundLocationUpdates = YES;
}
}
</code></pre>
<p>谢谢!</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您只想监控区域，而不是在后台不断更新它们的位置。</p>
<p>试试这个:</p>
<pre><code>self.locationManager.desiredAccuracy=kCLLocationAccuracyBest;
</code></pre>
<p>你真的需要将 distanceFilter 设置为 <code>kCLDistanceFilterNone</code> 吗？这将导致使用更多的电池电量。您可能想尝试将其设置为 10、20、50 甚至 100 米左右。</p>
<p>另外，为了不经常更新位置，而不是:</p>
<pre><code>;
</code></pre>
<p>尝试使用:</p>
<pre><code>;
</code></pre>
<p>所有这些都应该有助于减少电池使用量。当您将精度和距离过滤器设置为尽可能高的设置时，电池将会耗尽。</p>
<p><strong>编辑:</strong>
由于您的应用程序的目的，无论您做什么，都会消耗大量电池。我之前针对类似问题所做的一个解决方案是使用 NSTimer 创建算法或公式，该 NSTimer 每 x 分钟触发一次以更新用户的位置。 (但仅在区域移动 x 米时才更新区域)。</p>
<ul>
<li>在 NSTimer 触发之间停止位置更新，这样您就不会不断更新位置。</li>
<li>当计时器触发时，恢复位置更新，抓取大约 10 个位置(这样您就可以获得准确的位置)，然后关闭位置更新，直到下次触发计时器时</li>
</ul></p>
<p style="font-size: 20px;">关于ios - 区域监控(地理围栏)会消耗电池电量(iOS)，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/35208989/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/35208989/
</a>
</p>
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