coreplot - 总是同样的阴谋

Question

即时与coreplot工作的第一次 - 并得到它运行到目前为止。现在我偶然发现了一个奇怪的问题。

我担心我错过了一个重要的功能或coreplot的概念=）

即时实现：

numberofRecords 
doubleForPlot 

并已调试（尤其doubleForPlot）反复并且100％肯定doubleforplot实际上会返回给定索引的正确double。

但是：显示的图是总是一样。我得到一条线（问题底部的屏幕截图）。

我想： 调试 doubleForPlot - 它返回正确的号码 不同的数据我尝试总是返回相同的号码，希望看到一个不断线，结果：一个空的阴谋。 不同的数据我试着返回一些其他的值（不是常量），但后来我得到了所示的截图重复一遍。

这里是我的代码：

IBAction为 - 调用数据inizalisation并建立graphview

-(IBAction)displayDayBalanceGraph:(id)sender{ 
if (hasSubView) { 

    //[[expenseTable subviews] makeObjectsPerformSelector: @selector(removeFromSuperview)]; 
    [self updateView]; 
    NSLog(@"%@",expenseTable.subviews); 
} 

else{ 

    [self initializeMonthArray]; 

    CPTGraphHostingView *host = [self buildGraphView]; 

    [expenseTable addSubview:host]; 

    graph = [[CPTXYGraph alloc ]initWithFrame:host.frame]; 
    [graph setDelegate:self]; 


    // CPTTheme *theme = [CPTTheme themeNamed:kCPTDarkGradientTheme]; 
    // [graph applyTheme:theme]; 
    host.hostedGraph = graph; 


    CPTScatterPlot *plot = [[CPTScatterPlot alloc]init ]; 
    plot.dataSource = self; 
    [plot setIdentifier:@"balanceChart"]; 

    [plot setTitle:@"Balance History"]; 


    [graph addPlot:plot]; 


    hasSubView = !hasSubView; 
} 

} 

创建视图 - 初始化与合适的尺寸

-(CPTGraphHostingView *)buildGraphView{ 

CPTGraphHostingView *view = [[CPTGraphHostingView alloc]initWithFrame:CGRectMake(0, 0, 312, 220)]; 
[view setBackgroundColor:[self grayColor]]; 

return view; 
} 

托管视图

数据初始化 - 当IBAction为被击中以显示图形

-(void)initializeMonthArray{ 

[dataHandler updateData]; 

if (!allMonthExpenses) { 
    allMonthExpenses = [[NSMutableArray alloc]initWithCapacity:31]; 
} 

for (NSMutableArray *temp in allMonthExpenses) { 
    [temp removeAllObjects]; 
} 

[allMonthExpenses removeAllObjects]; 

for (int j = 0; j < 31; j++) {   //fill with 31 empty mutuable arrays 
    NSMutableArray *tempArray = [[NSMutableArray alloc]init]; 
    [allMonthExpenses addObject:tempArray]; 
} 

for (Expense *exp in dataHandler.allMonthExpenses) { 
    if (exp.expenseType.boolValue == 0) { 
     [[allMonthExpenses objectAtIndex:(exp.day.intValue-1)]addObject:exp]; 
    } 
} 
} 

doubleForPlot被调用 - 返回右双的索引

-(double)doubleForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index{ 

if (fieldEnum == 0) { 

    NSLog(@"Axis: %d and Value: %d",fieldEnum, index+1); 
    return (double)(index+1); 
} 

if (fieldEnum == 1) { 

    int dayInt = [dataHandler getDayNumber:[NSDate date]].intValue; 
    double total = 0; 
    for (Expense *exp in [allMonthExpenses objectAtIndex:index]) { 
     total = total + exp.value.doubleValue; 
    } 

    NSDate *date = [NSDate dateWithTimeIntervalSinceNow:(-(dayInt-(int)index-1)*(60*60*24))]; 

    double budgetValue = [dataHandler getSpecificBudgetForDate:[NSDate dateWithTimeIntervalSinceNow:(-(dayInt-(int)index-1)*(60*60*24))] ]; 
    total = budgetValue+total;  

    NSLog(@"\n Axis:%d \n Record for Day: %@ \n IndexForPlot: %d \n Value: %.2f \n",fieldEnum, date,index,total); 

    return total; 
} 

else 
    return 0; 
} 

numberOfRecords - 返回项

适量

-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot{  
return [dataHandler getDayNumber:[NSDate date]].intValue; 

} 

屏幕截图 - 这显示无论输入怎样的数据剧情

LOG - 该日志的末尾的doubleforplot方法证明正确的结果返回创建：

NSLog(@"\n Record for Day: %@ \n IndexForPlot: %d \n Value: %.2f \n",date,index,total); 

出来：

2012-03-20 10:29:55.834 DailyBudget[9493:fb03] 
Record for Day: 2012-03-01 09:29:55 +0000 
IndexForPlot: 0 
Value: 34.35 
2012-03-20 10:29:55.841 DailyBudget[9493:fb03] 
Record for Day: 2012-03-02 09:29:55 +0000 
IndexForPlot: 1 
Value: 8.35 
2012-03-20 10:29:55.848 DailyBudget[9493:fb03] 
Record for Day: 2012-03-03 09:29:55 +0000 
IndexForPlot: 2 
Value: 35.83 
2012-03-20 10:29:55.856 DailyBudget[9493:fb03] 
Record for Day: 2012-03-04 09:29:55 +0000 
IndexForPlot: 3 
Value: -14.89 
2012-03-20 10:29:55.863 DailyBudget[9493:fb03] 
Record for Day: 2012-03-05 09:29:55 +0000 
IndexForPlot: 4 
Value: 36.56 
2012-03-20 10:29:55.869 DailyBudget[9493:fb03] 
Record for Day: 2012-03-06 09:29:55 +0000 
IndexForPlot: 5 
Value: 8.96 

.... sparing you a lot of other log except the last. 

2012-03-20 10:29:55.980 DailyBudget[9493:fb03] 
Record for Day: 2012-03-20 09:29:55 +0000 
IndexForPlot: 19 
Value: 14.33 

Answer 1

我认为这是一个简单的错误。图中绘制的线中的每个点应具有x和y值。你为x和y返回相同的值。您可以通过方法中的磷含量来区分它

-(double)doubleForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index; 

。对于CPTScatterPlotFieldX，将为零，对于CPTScatterPlotFieldY，则为1。