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POCorePlot - CPTTimeFormatter gives me the same time for every element of my bar plot
 

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  1. POCorePlot - CPTTimeFormatter gives me the same time for every element of my bar plot
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    <p>I have a graph using Core-plot (CPTBarPlot) and I want to show days on the X axis, a different day for each bar in order. I have tried to set up CPTTimeFormatter as follows where x is my x axis.</p> <pre><code> NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init] ; dateFormatter.dateStyle = kCFDateFormatterMediumStyle; CPTTimeFormatter *timeFormatter = [[CPTTimeFormatter alloc] initWithDateFormatter:dateFormatter]; NSDate *refDate = [NSDate date]; timeFormatter.referenceDate = refDate; x.labelFormatter = timeFormatter; </code></pre> <p>Inside of numbersForPlot I am returning a set of numbers representing the elapsed seconds, and since I want to have sequential days it looks like 0, 86400, 172800, 259200, 345600, 432000, 518400 etc. </p> <p>I expected the X axis labels in this case to be sequential list of dates starting at refDate and going up by the number of seconds in numbersForPlot. Instead all I see is the same date repeating over and over for every bar on the x axis. Can anybody explain to me what I am doing wrong and how I might be able to fix it? thanks.</p> <p>EDIT: this is what my numbersForPlot function looks like inside my datasource:</p> <pre><code>-(NSArray *)numbersForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange { NSArray *nums = nil; switch ( fieldEnum ) { case CPTBarPlotFieldBarLocation: nums = [NSMutableArray arrayWithCapacity:indexRange.length]; for ( NSUInteger i = indexRange.location; i &lt; NSMaxRange(indexRange); i++ ) { [(NSMutableArray *)nums addObject :[NSDecimalNumber numberWithUnsignedInteger:i*secondsPerDay]]; } NSLog(@"NUMS = %@",nums); break; case CPTBarPlotFieldBarTip: nums = [stepsPerDay objectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:indexRange]]; break; default: break; } return nums; } </code></pre> <p>The relevant part is case CPTBarPlotFieldBarLocation which returns n array of values which I believe is correct...</p> <p>NUMS = ( 0, 86400, 172800, 259200, 345600, 432000, 518400 )</p>
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