如何在饼图中显示两个值

我是新手。我有一个名为dailyPortfolioPrices一个NSObject类，并在接口文件我声明3种性质如何在饼图中显示两个值

在dailyPortfolioPrices.h

@interface dailyPortfolioPrices : NSObject 

@property (nonatomic, weak) NSDecimalNumber *num1; 

@property (nonatomic, weak) NSDecimalNumber *num2; 

@property (nonatomic, weak) NSDecimalNumber *num3;

在dailyPortfolioPrices.m文件

我合成上述声明的属性。我创建了一个名为PageContentViewController的UIViewController类，用于显示。

在PageContentViewController.m文件的voidDidAppear我宣布为dailyPortfolioPrices值一样

dailyPortfolioPrices *dailyPortfolioPrices1 = [dailyPortfolioPrices new]; 
dailyPortfolioPrices1.num1 = @"586.13"; 
dailyPortfolioPrices1.num2 = @"606.53"; 
dailyPortfolioPrices1.num3 = @"32.03"; 


dailyPortfolioPrices *dailyPortfolioPrices2 = [dailyPortfolioPrices new]; 
dailyPortfolioPrices2.num1 = @"426.13"; 
dailyPortfolioPrices2.num2 = @"506.53"; 
dailyPortfolioPrices2.num3 = @"22.03"; 


dailyPortfolio = [NSArray arrayWithObjects: dailyPortfolioPrices1, dailyPortfolioPrices2, nil];

，并做了值编码为

！[在这里输入的形象描述] [2]

用于计算百分比值

NSDecimalNumber *price = [dailyPortfolio objectAtIndex:index]; 

NSDecimalNumber *percent = [price decimalNumberByDividingBy:portfolioSum];

用于设置显示标签

NSString *labelValue = [NSString stringWithFormat:@"$%0.2f USD (%0.1f %%)", [price floatValue], ([percent floatValue] * 100.0f)];

创建和标签文本

return [[CPTTextLayer alloc] initWithText:labelValue style:labelText]; } 

-(NSString *)legendTitleForPieChart:(CPTPieChart *)pieChart recordIndex:(NSUInteger)index { 

    if (index < [[[CPDStockPriceStore sharedInstance] tickerSymbols] count]) { 

     return [[[CPDStockPriceStore sharedInstance] tickerSymbols] objectAtIndex:index]; 

     } 

    return @"N/A"; 
}

但我的图表没有显示任何数据返回层。任何人都可以告诉我犯了什么错误。我想用index

感谢您的帮助，以显示UIViewController的pie chart提前

来源

2015-10-19 Jestin Saji Chacko