ios - Does the location manager's limit of 20 regions mean 20 total geofence AND beacon regions?

Question

I am afraid I know the answer to this.

Apple's location manager docs for the startMonitoringForRegion method say that you can monitor a maximum of 20 regions at a time.

I have a client app that makes heavy use of both geofence regions and beacon regions.

I had assumed that there were separate 20 region limits for geofence regions and beacon regions, but I fear that the limit is actually 20 regions total for both types.

Can somebody confirm my fears based on actual experience?

Answer 1

是的，20 个区域限制是 CoreLocation 允许您同时监控CLBeaconRegions 和CLCircularRegions（地理围栏）的最大值。当 iOS 7 添加信标支持时，由于 API 的定义方式，信标区域继承了地理围栏的相同限制。正如您所怀疑的，该限制适用于您要监控的任何类型的区域。因此，您可以监控 10CLBeaconRegion秒和 10CLCircularRegion秒，但每种类型的组合不超过 20 个。

Answer 2

每种类型的限制为 20 个CLRegion。这意味着您可以监控 20CLCircularRegion和 20 CLBeaconRegion。

这没有记录，但我做了一些测试并添加了超过 20CLBeaconRegion和超过 20 CLCircularRegion。结果self.locationManager.monitoredRegions.count是40有 20monitoredRegions个 typeCLCircularRegion和另外 20 个 type CLBeaconRegion。

一旦达到每种类型的限制CLRegion并尝试监视（该类型的）新区域，它们就会被忽略并使用错误代码locationManager:monitoringDidFailForRegion:withError:调用。kCLErrorRegionMonitoringFailure