CLLocationManager、MKReverseGeocoder、清理内存
在 More iPhone 3 开发书中，作者在使用 locationManager 委托方法获取更新后，将其放在该方法的末尾：
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
// some code here
manager.delegate = nil;
[manager stopUpdatingLocation];
[manager autorelease];
}
同样，在 MKReverseGeocoder 中em> 委托方法，当他完成后，他会这样做：
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark {
//some code here
geocoder.delegate = nil;
[geocoder autorelease];
}
为什么你需要这样做才能清理内存？我认为规则是如果你分配/初始化它，你需要释放它。他为什么要将locationManager和geocoder添加到自动释放池中？谢谢。
In the More iPhone 3 development book, after the author is done with the locationManager delegate method of getting updates, he puts this at the end of that method:
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
// some code here
manager.delegate = nil;
[manager stopUpdatingLocation];
[manager autorelease];
}
And similarly, in the MKReverseGeocoder delegate methods, when he's done he does this:
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark {
//some code here
geocoder.delegate = nil;
[geocoder autorelease];
}
Why do you need to do that in order to clean up memory? I thought the rule was if you alloc/init it, you need to release it. Why does he add the locationManager and geocoder to the autorelease pool? Thanks.
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这样做是为了避免调用委托方法
或
当您释放响应这些
CLLocationManager/MKReverseGeocoder协议的对象时This is done to avoid calling the delegate methods
or
when you dealloc the object that responds to those
CLLocationManager/MKReverseGeocoderprotocols