我目前正在为应用创建一个图表,使用coreplot并且有一个我无法解释的问题。
我读过(并没有帮助): core-plot, unable to plot two graphs
问题:为什么只显示第二个添加的图?如果我改变顺序我将它们添加到hostView,只显示我添加的最后一个。看代码&截图如下。
图表将包含2个不同的图
PROBLEM:
- both plots show perfectly if added alone.
- if i add both plots, only the second (last) one added gets displayed.
- to assure you that both are well on their own i added screenshots on the bottom.
第一个地块一个0行
identifier : @"nullLine"
name: nullPlot
第二个绘图我存储的数据的散点图
identifier : @"balanceChart"
name: plot
这是我的一些代码:
CPTGraphHostingView *host = [self buildGraphView]; //returns a viewwithframe
[view addSubview:host];
graph = [[CPTXYGraph alloc ]initWithFrame:host.frame];
host.hostedGraph = graph;
CPTScatterPlot *plot = [[CPTScatterPlot alloc]init ];
plot.dataSource = self;
[plot setIdentifier:@"balanceChart"];
// Setup plot space
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = YES;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(1.0) length:CPTDecimalFromFloat(20.0)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(-200.0) length:CPTDecimalFromFloat(400.0)];
CPTScatterPlot *nullPlot = [[CPTScatterPlot alloc]init ];
nullPlot.dataSource = self;
[nullPlot setIdentifier:@"nullLine"];
[nullPlot setPlotSpace:plotSpace];
[plot setPlotSpace:plotSpace];
[graph addPlot:nullPlot];
[graph addPlot:plot];
和我的doubleForPlot
功能:
注意:我只添加此功能以完成 - 它绝对可以100%为两个图形返回正确的值!
-(double)doubleForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index{
// NULL CHART
if ([(NSString *)plot.identifier isEqualToString:@"nullLine"]) {
if (fieldEnum == CPTScatterPlotFieldX) {
NSLog(@"Plot: %@,fieldEnum: %d, index: %d",plot,fieldEnum,index);
return index+1;
}
if (fieldEnum == CPTScatterPlotFieldY) {
NSLog(@"Plot: %@,fieldEnum: %d, index: %d",plot,fieldEnum,index);
double zero = 0;
return zero;
}
}
// BALANCE CHART
if ([(NSString *)plot.identifier isEqualToString:@"balanceChart"]) {
if (fieldEnum == CPTScatterPlotFieldX) {
NSLog(@"Axis: %d and Value: %d",fieldEnum, index+1);
return (double)(index+1);
}
if (fieldEnum == CPTScatterPlotFieldY) {
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;
}
}
return 0;
}
这里是numberOfRecordsForPlot
方法:
注意两个地块都有相同数量的记录。这也会返回正确的数字。
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot{
return [dataHandler getDayNumber:[NSDate date]].intValue;
}
旁注请不要介意图的格式; - )
答案 0 :(得分:1)
我在测试应用程序中尝试了您的代码并且工作正常 - 两个图都出现了。您的代码中必定还有其他内容。