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a guest Mar 7th, 2013 23 Never
  1. char fourChar[4];
  2.     int* value = (int*)(&fourChar);
  3.     *value = (int)floatValueFromSlider;  // or the simple values from your picker
  4.     [appNote sendCharArray:fourChar];    // assuming the method wants a char[] of only 4 characters
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