我遇到了一个问题,即GPS服务在iOS 7上可以完美地工作,但在iOS 8上却从未收到权限请求,也无法使用以下方法:
- (void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
从未被调用。
我的代码在这里:
#import "Locator.h"
@implementation Locator
- (instancetype) init {
if (self = [super init]) {
// Start up the location manager
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.distanceFilter = 3;
// New property for iOS6
if ([self.locationManager respondsToSelector:@selector(activityType)]) {
self.locationManager.activityType = CLActivityTypeFitness;
}
// New method for iOS8
if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
[self.locationManager requestAlwaysAuthorization];
}
}
return self;
}
- (void) startMonitoring:(LocationChangeCallback)callback {
if ([CLLocationManager locationServicesEnabled] && [CLLocationManager significantLocationChangeMonitoringAvailable]) {
// Register an observer for if/when this app goes into background & comes back to foreground
// NOTE: THIS CODE IS iOS4.0+ ONLY.
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(switchToLowEnergyMode) name:UIApplicationDidEnterBackgroundNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(switchToAccurateMode) name:UIApplicationDidFinishLaunchingNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(switchToAccurateMode) name:UIApplicationWillEnterForegroundNotification object:nil];
UIApplicationState state = [[UIApplication sharedApplication] applicationState];
self.locationUpdateCallback = callback;
if (state == UIApplicationStateActive) {
[self switchToAccurateMode];
} else {
[self switchToLowEnergyMode];
}
}
}
- (void) switchToAccurateMode {
NSLog(@"Accurate");
[self.locationManager stopMonitoringSignificantLocationChanges];
// Find the current location
[self.locationManager startUpdatingLocation];
}
- (void) switchToLowEnergyMode {
NSLog(@"Low Energy");
[self.locationManager stopUpdatingLocation];
// Find the current location
[self.locationManager startMonitoringSignificantLocationChanges];
}
#pragma mark - CLLocationDelegate Methods
- (void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
// locations contains an array of recent locations, but this app only cares about the most recent
// which is also "manager.location"
if (self.locationUpdateCallback != nil) {
self.locationUpdateCallback(manager.location);
}
}
- (void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
NSLog(@"Location manager failed with error: %@", error);
if ([error.domain isEqualToString:kCLErrorDomain] && error.code == kCLErrorDenied) {
//user denied location services so stop updating manager
[manager stopUpdatingLocation];
}
}
@end
我还在位置设置下检查了一下,但我的应用名称后面没有任何内容。其他应用程序都有(“始终”,“从不”或“使用时”)。