iphone - remove Annotation removes random amount of annotations at a time -

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i've got code erase annotations (pins) in mkmapview without erasing blue dot (userlocation). problem erasing pins i've added in seemingly random numbers. when it's called through ibaction removes first 5 click again removes next 3, next 2, last one.

when pressed need remove latest pin...etc. etc.

for (int = 0;       < [mapview.annotations count];       i++       )    { if ([[mapview.annotations objectatindex:i] iskindofclass:[myannotation class]])     {  [mapview removeannotation:[mapview.annotations objectatindex:i]];      }  }

the problem modifying annotation collection while iterating on it. @ every execution of loop, loop's termination condition [mapview.annotations count] changes value. lead unforeseen behavior. should

  • either put annotations want remove empty mutable array inside loop call removeannotations: array parameter after exit loop,
  • or count down annotation highest index 0.

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