7
我所有的代碼是在AppDelegate.m：顯著改變位置委託方法不會被調用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
_locationMgr = [[CLLocationManager alloc] init];
[_locationMgr setDelegate:self];
if([_locationMgr respondsToSelector:@selector(setAllowsBackgroundLocationUpdates:)])
[_locationMgr setAllowsBackgroundLocationUpdates:YES];
CLAuthorizationStatus authorizationStatus= [CLLocationManager authorizationStatus];
if([launchOptions valueForKey:UIApplicationLaunchOptionsLocationKey] != nil) {
NSLog(@"relaunching because of significant location change - restarting SLC");
[_locationMgr startMonitoringSignificantLocationChanges];
}
else
{
if (authorizationStatus == kCLAuthorizationStatusAuthorizedAlways) {
NSLog(@"launching with authorization to always use location - starting SLC");
[_locationMgr startMonitoringSignificantLocationChanges];
}
else
{
NSLog(@"launching with no authorization to always use location - requesting authorization");
if([_locationMgr respondsToSelector:@selector(requestAlwaysAuthorization)])
[_locationMgr requestAlwaysAuthorization];
}
}
if([userdefaults objectForKey:@"pfuser"] == nil) {
NSLog(@"in delegate signup");
SignUpController *signup = [[SignUpController alloc] init];
[self.window setRootViewController:signup];
}
else {
ViewController *map = [[ViewController alloc] init];
[self.window setRootViewController:map];
}
[self.window makeKeyAndVisible];
return YES;
}
- (void)startSignificantChangeUpdates
{
deviceNotFoundAlertController = [UIAlertController alertControllerWithTitle:@"START" message:@"startSignificantChangeUpdates called" preferredStyle:UIAlertControllerStyleAlert];
[deviceNotFoundAlertController addAction:deviceNotFoundAlert];
// Create the location manager if this object does not
// already have one.
if (nil == _locationMgr) {
_locationMgr = [[CLLocationManager alloc] init];
_locationMgr.delegate = self;
}
[CLLocationManager significantLocationChangeMonitoringAvailable];
[_locationMgr startMonitoringSignificantLocationChanges];
}
-(void)locationManger:(CLLocationManager *)manager didFailWithError:(NSError *)error {
NSLog(@"didFailWithError: %@", error);
deviceNotFoundAlertController = [UIAlertController alertControllerWithTitle:@"LOCATION FAIL" message:@"didFailWithError" preferredStyle:UIAlertControllerStyleAlert];
[deviceNotFoundAlertController addAction:deviceNotFoundAlert];
}
// Delegate method from the CLLocationManagerDelegate protocol.
- (void)_locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations {
deviceNotFoundAlertController = [UIAlertController alertControllerWithTitle:@"LOCATION UPDATE" message:@"didUpdateLocations called" preferredStyle:UIAlertControllerStyleAlert];
[deviceNotFoundAlertController addAction:deviceNotFoundAlert];
// If it's a relatively recent event, turn off updates to save power.
CLLocation* location = [locations lastObject];
NSDate* eventDate = location.timestamp;
NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
if (fabs(howRecent) < 15.0) {
// If the event is recent, do something with it.
NSLog(@"latitude %+.6f, longitude %+.6f\n",
location.coordinate.latitude,
location.coordinate.longitude);
}
}
警報都沒有發生，似乎沒有被稱爲委託方法。
UPDATE
現在我有：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
deviceNotFoundAlert = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
...
}
// Delegate method from the CLLocationManagerDelegate protocol.
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations {
deviceNotFoundAlertController = [UIAlertController alertControllerWithTitle:@"LOCATION UPDATE" message:@"didUpdateLocations called" preferredStyle:UIAlertControllerStyleAlert];
[deviceNotFoundAlertController addAction:deviceNotFoundAlert];
// If it's a relatively recent event, turn off updates to save power.
CLLocation* location = [locations lastObject];
NSDate* eventDate = location.timestamp;
NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
if (fabs(howRecent) < 15.0) {
// If the event is recent, do something with it.
NSLog(@"latitude %+.6f, longitude %+.6f\n",
location.coordinate.latitude,
location.coordinate.longitude);
}
}
當我測試的應用程序，我打開它在我的房子，然後將其關閉，這樣，當我離開我的房子應該送（或3），但我沒有收到來自任何委託方法（我放置警報的位置）的警報。
我剛剛有一個想法，也許我必須顯示從主UIViewController，而不是AppDelegate警報？
這可能就是爲什麼我沒有看到警報：How do I add a UIAlertController in app delegate (obj-c)
UPDATE
這就是我正在做的警報現在：
deviceNotFoundAlertController = [UIAlertController alertControllerWithTitle:@"START" message:@"startSignificantChangeUpdates called" preferredStyle:UIAlertControllerStyleAlert];
[deviceNotFoundAlertController addAction:deviceNotFoundAlert];
alertWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
alertWindow.rootViewController = [[UIViewController alloc] init];
alertWindow.windowLevel = UIWindowLevelAlert + 1;
[alertWindow makeKeyAndVisible];
[alertWindow.rootViewController presentViewController:deviceNotFoundAlertController animated:YES completion:nil];
UPDATE
警報似乎不是問題，麥芽酒rt startSignificantChangeUpdates從未出現。一旦我離開我的初始位置500米後，它會出現嗎？
UPDATE
誰能幫助我理解？
您的委託對象的方法是從您啓動相應位置服務的線程中調用的。該線程本身必須有一個活動的運行循環，就像在應用程序的主線程中找到的一樣。
UPDATE
我想我想通了什麼，以上報價是說......我有現在這樣 - 我明天將測試。
...
if([launchOptions valueForKey:UIApplicationLaunchOptionsLocationKey] != nil) {
NSLog(@"relaunching because of significant location change - restarting SLC");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[_locationMgr startMonitoringSignificantLocationChanges];
});
}
else
{
if (authorizationStatus == kCLAuthorizationStatusAuthorizedAlways) {
NSLog(@"launching with authorization to always use location - starting SLC");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[_locationMgr startMonitoringSignificantLocationChanges];
});
}
else
{
NSLog(@"launching with no authorization to always use location - requesting authorization");
if([_locationMgr respondsToSelector:@selector(requestAlwaysAuthorization)])
[_locationMgr requestAlwaysAuthorization];
}
}
...
我認爲代碼是在自己的線程上啓動位置服務。我注意到的一件事是，當我退出應用程序時，右上角的位置消失。我剛剛更新到了iOS 10.在iOS 9中，右上角的位置箭頭將停留在那裏，但當應用程序未運行時，它只會是黑色輪廓。這可能只是他們在iOS 10中改變的東西，或者現在因爲我已更新到10，現在還沒有其他工作。或者當位置服務在自己的線程上運行時會發生什麼情況。從這裏：iOS start Background Thread
UPDATE
也許我沒有正確地使用線程，但正如我所說的，現在當我關閉應用程序，位置服務退出。當我在沒有線程的情況下執行時，位置服務箭頭將保留在右上角，作爲大綱。
UPDATE
，我讀了服務應該在主線程啓動 - 所以我現在：
CLAuthorizationStatus authorizationStatus= [CLLocationManager authorizationStatus];
NSLog(@"launching with no authorization to always use location - requesting authorization");
if([_locationMgr respondsToSelector:@selector(requestAlwaysAuthorization)]) {
[_locationMgr requestAlwaysAuthorization];
}
if([launchOptions valueForKey:UIApplicationLaunchOptionsLocationKey] != nil) {
NSLog(@"relaunching because of significant location change - restarting SLC");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[_locationMgr startMonitoringSignificantLocationChanges];
});
}
else if (authorizationStatus == kCLAuthorizationStatusAuthorizedAlways) {
NSLog(@"launching with authorization to always use location - starting SLC");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[_locationMgr startMonitoringSignificantLocationChanges];
});
}
else {
//
}
中不顯示時，應用程序是右側的箭頭關閉，這是iOS 10的新功能，它們不再顯示它嗎？
UPDATE
我不小心刪除：_locationMgr = [[CLLocationManager alloc] init];我把現在的箭頭是永遠存在的，今天要測試。
UPDATE
我測試了，仍然沒有警報。
您是否配置了使用位置服務的plist？如果沒有，那麼你需要做到這一點。有兩個選項requestAlwaysAuthorization和requestWhenInUseAuthorization。讓我知道如果這可以解決您的問題 – Janmenjaya
嗨，是的，我有 - 當我輸入它時，更改爲「隱私 - 位置總是使用說明」，然後我在另一列中輸入消息...現在實際上有些不同了...我想我需要再次測試生病讓你知道 – ewizard
我也有'需要的背景模式'與'Item0'和'應用程序寄存器的位置更新' – ewizard