testing GPS in iPhone simulator problem

问题

I found some various articles about testing the GPS (corelocation) in the iPhone simulator. It seems pretty straightforward, but i can't get it to work.

The error message i'am getting is:

2010-07-30 11:20:16.372 appname[50954:207] *** +[CLLocation initWithCoordinate:altitude:horizontalAccuracy:verticalAccuracy:timestamp:]: unrecognized selector sent to class 0x32081320

2010-07-30 11:20:16.373 appname[50954:207] CoreAnimation: ignoring exception: *** +[CLLocation initWithCoordinate:altitude:horizontalAccuracy:verticalAccuracy:timestamp:]: unrecognized selector sent to class 0x32081320

the code i'am using is:

self.locationManager = [[[CLLocationManager alloc] init] autorelease];
locationManager.delegate = self;
locationManager.distanceFilter = 100.0f;
locationManager.desiredAccuracy= kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];

// test simulator location once
[NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(updateTestLocation) userInfo:nil repeats:NO];


-(void)updateTestLocation{

CLLocationCoordinate2D newlocation;
newlocation.latitude = 37.0;
newlocation.longitude = 127.0;

CLLocation *sampleLocationUpdate = [[CLLocation init] initWithCoordinate:newlocation altitude:100 horizontalAccuracy:100 verticalAccuracy:100 timestamp:[NSDate date]];             

[self locationManager:nil didUpdateToLocation: sampleLocationUpdate fromLocation: nil];
//[self locationManager:locationManager didUpdateToLocation: sampleLocationUpdate fromLocation: nil];

i hope someone can help me fix this, because it sure will save a lot of time testing

回答1:

Shouldn't it be [[CLLocation alloc] init...]; and not [[CLLocation init] init...];?

回答2:

It turn out the next line was causing the error

CLLocationCoordinate2D newlocation; 
newlocation.latitude = 37.0;
newlocation.longitude = 127.0;

CLLocation *sampleLocationUpdate = [[CLLocation alloc] initWithCoordinate: newlocation altitude:100 horizontalAccuracy:100 verticalAccuracy:100 timestamp:[NSDate date]];

i changed it to:

CLLocation *sampleLocationUpdate = [[CLLocation alloc] initWithLatitude:37.0 longitude:127.0];

来源：https://stackoverflow.com/questions/3370289/testing-gps-in-iphone-simulator-problem