ios CLGeocoder reverseGeocodeLocation 返回“kCLErrorDomain 错误 9”
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CLGeocoder reverseGeocodeLocation returns 'kCLErrorDomain error 9'
提问by goofansu
I'm developing an iOS app with reverse geocoding features according to this article: geocoding tutorial
我正在根据本文开发具有反向地理编码功能的 iOS 应用程序：地理编码教程
But when I test like this on simulator, I get 'kCLErrorDomain error 9'. I've searched a lot and there are only error 0 or 1 not 9.
但是当我在模拟器上进行这样的测试时，我得到了“kCLErrorDomain 错误 9”。我搜索了很多，只有错误 0 或 1 而不是 9。
Here is my code in viewDidLoad:
这是我的代码viewDidLoad：
self.locationManager = [[CLLocationManager alloc]init];
self.locationManager.delegate = self;
self.locationManager.distanceFilter = 80.0;
[self.locationManager startUpdatingLocation];
CLGeocoder *geocoder = [[[CLGeocoder alloc] init] autorelease];
[geocoder reverseGeocodeLocation:self.locationManager.location
completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(@"reverseGeocodeLocation:completionHandler: Completion Handler called!");
if (error){
NSLog(@"Geocode failed with error: %@", error);
return;
}
if(placemarks && placemarks.count > 0)
{
//do something
CLPlacemark *topResult = [placemarks objectAtIndex:0];
NSString *addressTxt = [NSString stringWithFormat:@"%@ %@,%@ %@",
[topResult subThoroughfare],[topResult thoroughfare],
[topResult locality], [topResult administrativeArea]];
NSLog(@"%@",addressTxt);
}
}];
Thank you very much.
非常感谢。
回答by
The Core Location error codes are documented here.
此处记录了核心位置错误代码。
Code values 8, 9, and 10 are:
代码值 8、9 和 10 是：
kCLErrorGeocodeFoundNoResult,
kCLErrorGeocodeFoundPartialResult,
kCLErrorGeocodeCanceled
Based on the code shown, the most likely reason you'd get error 8 is that it's trying to use locationimmediately after calling startUpdatingLocationat which time it might still be nil.
根据显示的代码，您收到错误 8 的最可能原因是它location在调用后立即尝试使用startUpdatingLocation，而此时它可能仍然是nil.
It usually takes a few seconds to obtain the current location and it will most likely be niluntil then (resulting in geocode error 8 or kCLErrorGeocodeFoundNoResult). I'm not sure what error code 9 means by "FoundPartialResult" but Apple's GeocoderDemo sample app treats both the same way (as "No Result").
获取当前位置通常需要几秒钟的时间，而且很可能要nil等到那时（导致地理编码错误 8 或kCLErrorGeocodeFoundNoResult）。我不确定“FoundPartialResult”的错误代码 9 是什么意思，但 Apple 的 GeocoderDemo 示例应用程序以相同的方式处理这两者（作为“No Result”）。
Try moving the geocoding code (all the code after the startUpdatingLocationcall) to the delegate method locationManager:didUpdateToLocation:fromLocation:. The location manager will call that delegate method when it actually has a location and only then is it safe to use location.
尝试将地理编码代码（startUpdatingLocation调用后的所有代码）移动到委托方法locationManager:didUpdateToLocation:fromLocation:。位置管理器将在实际拥有位置时调用该委托方法，然后才可以安全使用location。
There, after the geocoding is successful (or not), you may want to call stopUpdatingLocationotherwise it will try geocoding every time the user location is updated.
在那里，在地理编码成功（或不成功）之后，您可能想要调用stopUpdatingLocation否则它会在每次用户位置更新时尝试地理编码。
You may also want to check the accuracy (newLocation.horizontalAccuracy) and age (newLocation.timestamp) of the received location before trying to geocode it.
在尝试对其进行地理编码之前，您可能还想检查接收位置的准确性 ( newLocation.horizontalAccuracy) 和年龄 ( newLocation.timestamp)。
回答by Jim
It turns out I mixed up the longitute and latitude when creating the location. Thought I'd add this as something for people to check.
事实证明，我在创建位置时混淆了经度和纬度。以为我会添加这个作为人们检查的东西。
