Positioning label on CPTBarPlot (Core-Plot)

问题

I am trying to change default position of labels in Bar chart with Core-Plot. I am using this method:

-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)idx;

And I return:

return textLayer = [[CPTTextLayer alloc] initWithText:@"2222" style:textStyle];

I get this result:

But I want to appear as follows:

Any idea? I tried to find answer on documentation, but I has been impossible.

回答1:

Use a negative labelOffset for the bar plot. The default is +10 which puts the labels 10 pixels above the bars. This property is inherited from CPTPlot so it works for all plot types, although the default value and behavior varies somewhat.

来源：https://stackoverflow.com/questions/13475573/positioning-label-on-cptbarplot-core-plot