iPhone: Confused about what this method declaration is saying

I am new to iPhone. Can someone explain this method declaration to me:

- (void)locationManager:(CLLocationManager *)manager
       didFailWithError:(NSError *) error{

Here is what I am guessing:

• (void) - method does not return anything
• locationManager: - ???
• (CLLocationManager *)manager - this looks like a parameter. To a CLLocationManager.
• didFailWithError: - This seems like the method name
• (NSError *) error - This also seems like a parameter开发者_JAVA百科. I am somewhat confused about why there are parameters in two locations.

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This is Objective C, not regular C, so the function name is interspersed with the parameters. locationManager and didFailWithError are both part of the function name.

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Have a a look here: http://cocoadevcentral.com/d/learn_objectivec/