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Re: Guidelines on using NSJSONSerialization
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Re: Guidelines on using NSJSONSerialization


  • Subject: Re: Guidelines on using NSJSONSerialization
  • From: Fritz Anderson <email@hidden>
  • Date: Thu, 19 Apr 2012 12:39:35 -0500

On 19 Apr 2012, at 12:01 PM, Alex Zavatone wrote:

> Yeah, it was the fact that the CLLocationDegrees in the CLLocationCoordinate2D struct were doubles, or that CLLocationCoordinate2D was a struct.

Likely both. structs are not wrapped NSNumbers, NSStrings, NSArrays, NSDictionaries, or NSNulls, and doubles are not NSNumbers.

> The other possibility might be if the mapView.annotations array  is nil terminated, that might cause the premature death.

This confuses me. MKMapView.annotations is an NSArray. How can an NSArray be nil-terminated? It has a count and there's no way to index into it that would return anything but an object. There's no need and no way to terminate it.

> Still think that NSJSONSerialization dataWithJSONObject:jAnnotations options:NSJSONWritingPrettyPrinted error:&error should throw an error rather than just crashing. Seems odd to have the error option there, but not usable.

It's not magic. All methods that expect objects crash if you give them some other kind of pointer instead.

If, however, jAnnotations is an NSArray, the method should be able to detect that its contents are not of the supported type. The method shouldn't crash.

	— F


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  • Follow-Ups:
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References: 
 >Guidelines on using NSJSONSerialization (From: Alex Zavatone <email@hidden>)
 >Re: Guidelines on using NSJSONSerialization (From: Alex Zavatone <email@hidden>)

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