iPhone需要更新多个控制器中的位置
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我试图在多个控制器上获取用户的当前位置，它们是导航控制器，tabbarcontroller，presentmodel控制器的一部分，因此基本上我真的不能做诸如self.navigationcontroller或self.tabBarController之类的事情。
我所做的是我创建了LocationHelper和LocationHelperDelegate
@protocol LocationHelperDelegate
@required
- (void)locationUpdate:(CLLocation *)location; // Our location updates are sent here
- (void)locationError:(NSError *)error; // Any errors are sent here
@end
@interface LocationHelper : NSObject <CLLocationManagerDelegate>{
CLLocationManager *locationManager;
CLLocation *currentLocation;
id delegate;
}
@property (nonatomic, retain) CLLocation *currentLocation;
@property (nonatomic, retain) CLLocationManager *locationManager;
@property (nonatomic, assign) id delegate;
@end
-(id) init {
self = [super init];
if(self != nil){
self.locationManager = [[[CLLocationManager alloc] init] autorelease];
self.locationManager.delegate = self;
}
return self;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation
*)newLocation fromLocation:(CLLocation *)oldLocation {
if([self.delegate conformsToProtocol:@protocol(LocationHelperDelegate)]) {
[self.delegate locationUpdate:newLocation];
}
}
LocationHelper* locationHelper = [[LocationHelper alloc]init];
locationHelper.delegate = self;
[locationHelper.locationManager startUpdatingLocation];
- (void)locationUpdate:(CLLocation *)location {
latitude = location.coordinate.latitude;
longitude = location.coordinate.longitude;
[locationHelper.locationManager stopUpdatingLocation];
}
没有找到相关结果
已邀请:
3 个回复
凸晴
[[NSNotificationCenter defaultCenter] postNotificationName:@\"requestFinished\" object:self userInfo:resultDictionary];[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(requestFinishedHandler:) name:@\"requestFinished\" object:nil];- (void)requestFinishedHandler:(NSNotification *)notification { resultDictionary = [notification userInfo]; }帆攀缺锯欧
这样，您所有的位置获取/管理/存储位置都可以在一个位置上找到，您可以从应用程序中的任何位置访问该位置，并使所有内容保持整洁 编辑：在回答问题“按键值观察，您是指通知”时，答案是否定的。它们是完全不同的东西。 在任何视图控制器中-可能在viewDidLoad中-您可以说：然后执行：- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { MyAppDelegate *del = (MyAppDelegate *)object; CLLocation *hereIAm = del.currentLocation; // and then do whatever with that }唤副埂侧壬