Fixed iOS 7 test breakage and crash from #1382

These APIs were introduced in iOS 8+, hence the `-respondsToSelector:` check. But I saw that, thinking it was just redundant, and removed it in #1382, leading to a crash on launch on iOS 7.

1 files changed, 8 insertions, 2 deletions

diff --git a/platform/ios/MGLMetricsLocationManager.m b/platform/ios/MGLMetricsLocationManager.m
index 2a31d77d3f..a193d9b6ec 100644
--- a/platform/ios/MGLMetricsLocationManager.m
+++ b/platform/ios/MGLMetricsLocationManager.m
@@ -49,11 +49,17 @@
 }
 
 - (void)startMonitoringVisits {
-    [self.locationManager startMonitoringVisits];
+    // -[CLLocationManager startMonitoringVisits] is only available in iOS 8+.
+    if ([self.locationManager respondsToSelector:@selector(startMonitoringVisits)]) {
+        [self.locationManager startMonitoringVisits];
+    }
 }
 
 - (void)stopMonitoringVisits {
-    [self.locationManager stopMonitoringVisits];
+    // -[CLLocationManager stopMonitoringVisits] is only available in iOS 8+.
+    if ([self.locationManager respondsToSelector:@selector(stopMonitoringVisits)]) {
+        [self.locationManager stopMonitoringVisits];
+    }
 }
 
 #pragma mark CLLocationManagerDelegate