Question

I had added labels to the pie chart like this -(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index {

CPTTextLayer *newLayer = nil;
UIFont *theFont;

static CPTMutableTextStyle *whiteText = nil;

if ( !whiteText )
{
    whiteText = [[CPTMutableTextStyle alloc] init];
    whiteText.color = [CPTColor blackColor];
    whiteText.textAlignment = CPTTextAlignmentCenter;
    whiteText.fontName = @"Helvetica-Bold";
    whiteText.fontSize =  10.0f;
   theFont = [UIFont fontWithName:whiteText.fontName size:whiteText.fontSize];


}
if ( [plot isKindOfClass:[CPTPieChart class]] ) 
{
    newLayer.delegate = self;
    newLayer = [[[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%@", [pieChartData2 objectAtIndex:index]] style:whiteText] autorelease];
      }

return newLayer;
    }

What I want here is (1)I want to wrap the text which is too long. (2) I want to display the the Slice title and and its value . (3) I need to draw a line to title and Slice . Please any one help me.

预先感谢

Answer 1

You can insert newline characters ( ) in the text to wrap to the next line. Core Plot does not auto-wrap any text.
这是一个数据来源方法——它应当能够获取数据价值和标题。两者都用于建立标识。
绘制标签的线图尚未得到支持。你可以把CPTText Layer的习俗分门,除案文外,还照此行,而不是用CPTText Layer来贴标签。

友情链接