CLLocationManager startUpdatingLocation不起作用

问题描述

所以现在我至少得到了以下代码的回调...

So now I'm at least getting callbacks with the following code...

- (void)viewDidLoad {

[super viewDidLoad];
mapView=[[MKMapView alloc] initWithFrame:self.view.frame];
//mapView.showsUserLocation=TRUE;
mapView.delegate=self;
[self.view insertSubview:mapView atIndex:0];

NSLog(@"locationServicesEnabled: %@", [CLLocationManager locationServicesEnabled] ? @"YES":@"NO");
    CLLocationManager *newLocationManager = [[CLLocationManager alloc] init];
    [newLocationManager setDesiredAccuracy:kCLLocationAccuracyBest];
    [newLocationManager setDistanceFilter:kCLDistanceFilterNone];
    [self setLocationManager:newLocationManager];


[[self locationManager] setDelegate:self];
[[self locationManager] startUpdatingLocation];
NSLog(@"Started updating Location");

}


- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

NSLog(@"Did update to location");
mStoreLocationButton.hidden=FALSE;
location=newLocation.coordinate;

MKCoordinateRegion region;
region.center=location;
MKCoordinateSpan span;
span.latitudeDelta=0.01;
span.longitudeDelta=0.01;
region.span=span;


[mapView setRegion:region animated:TRUE];


}

我可以在第二种方法中设置断点和NSLog报告持续的位置更新，但由于某种原因，带有跨度的缩放不起作用。知道为什么吗？它有我的坐标和一切。在这个问题上划个不停。

I can set breakpoints in the second method and NSLog is reporting continual location updates, but for some reason the zoom with span isn't working. Any idea why? It's got my coordinates and everything. Sort of scratching my head on this one.

推荐答案

将CLLocationManager分配给班级的（强）属性。 （我假设你正在使用ARC BTW。）现在CLLocationManager没有超过viewDidLoad方法的结尾，所以它也不会调用你的委托方法。

Assign the CLLocationManager to a (strong) property on your class. (I assume you're using ARC BTW.) Right now the CLLocationManager doesn't live past the end of the viewDidLoad method, so it won't get to call your delegate method either.

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