如何删除标签的阴影添加到馅饼阴谋使用核心阴谋libraru在iphone sdk

Question

我已经添加了阴影的馅饼情节，但我也获得标签数据的阴影。我想删除那个影子。请帮帮我。 在此先感谢。

  piePlot.dataSource = self; 
    piePlot.pieRadius = 65.0; 
    piePlot.pieInnerRadius = 35.0; 
    piePlot.shadowColor = [[UIColor blackColor]CGColor]; 
    piePlot.shadowRadius = 3.0; 
    piePlot.shadowOffset = CGSizeMake(8,-3); 
    piePlot.shadowOpacity = 1.0; 
    piePlot.identifier = @"Current Year Credits By Type"; 
    piePlot.startAngle = M_PI_4; 
    piePlot.sliceDirection = CPTPieDirectionClockwise; 
    piePlot.borderLineStyle = [CPTLineStyle lineStyle]; 
    piePlot.sliceLabelOffset = 10.0; 

- （CPTLayer *）dataLabelForPlot：（CPTPlot *）情节recordIndex：（NSUInteger）指数 {

CPTTextLayer *newLayer = nil; 

static CPTMutableTextStyle *whiteText = nil; 

if (!whiteText) 
{ 
    whiteText = [[CPTMutableTextStyle alloc] init]; 
    whiteText.color = [CPTColor blackColor]; 
} 

if ([plot isKindOfClass:[CPTPieChart class]]) 
{ 
    NSString *str = [NSString stringWithFormat:@"%@",[pieChartData1 objectAtIndex:index]]; 

    newLayer = [[[CPTTextLayer alloc] initWithText:str style:whiteText] autorelease]; 

} 

return newLayer; 

}

Answer 1

使用核心情节的CPTShadow类，而不是CALayer阴影属性。

CPTMutableShadow *blackShadow = [CPTMutableShadow shadow]; 
blackShadow.shadowOffset = CGSizeMake(8,-3); 
blackShadow.shadowColor = [CPTColor blackColor]; 

piePlot.shadow = blackShadow;