Re: Array annotation strangeness
Re: Array annotation strangeness
- Subject: Re: Array annotation strangeness
- From: Alex Zavatone <email@hidden>
- Date: Wed, 09 May 2012 14:29:34 -0400
This is what I get for copying and pasting code.
Thank you.
On May 9, 2012, at 2:28 PM, John Pannell wrote:
> Hi Alex-
>
> When enumerating the array, you've defined the objects in the collection as NSDictionary (which doesn't have that method)...
>
> for (NSDictionary * myAnnotation in self.mapView.annotations)
>
> Change the above to:
>
> for (MyLocation * myAnnotation in self.mapView.annotations)
>
> And the compiler should be happier...
>
> Hope this helps!
>
> John
>
>
> On May 9, 2012, at 12:09 PM, Alex Zavatone wrote:
>
>> Back on iterating through a mapKit annotation array, I'm bending my brain cell on this one.
>>
>> All my annotations are instances of the MyLocation class
>>
>> I added a method to expose the properties I want to save by returning a dict to the class.
>>
>> After all annotations are added, and I want to walk the array and build an array of annotations, I do this:
>>
>> - (IBAction)saveData:(id)sender
>> {
>> for (NSDictionary * myAnnotation in self.mapView.annotations)
>> {
>> MyLocation *tempLocation = [[MyLocation alloc] init ];
>>
>> // test that the methods in the MyLocation objects actually work on an empty object
>> NSString *myString = [tempLocation name];
>> NSDictionary *myDict = [tempLocation returnCoordinatesInDict];
>> NSDictionary *myStuffDict = [tempLocation returnPropertiesInDict];
>> // Try it with one of the MyLocation objects in the annotation array
>> NSDictionary *myGoodsDict = [myAnnotation returnPropertiesInDict];
>>
>> Xcode will not let the last line compile with a "Receiver type 'NSDictionary' for instance message does not declare a method with selector 'returnPropertiesInDict'
>>
>> But if I comment out that line, set a breakpoint, it clearly shows that myAnnotation is a myLocation instance just like tempLocation.
>>
>> Does anyone know what I am missing here?
>>
>> Thanks,
>> - Alex
>>
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