我目前正在使用coreplot为应用程序创建图形,并且有一个我无法解释的问题。
我读了(它没有帮助):
core-plot, unable to plot two graphs
问题:为什么只显示第二个添加的图?如果我更改了将它们添加到hostView的顺序,则仅显示我添加的最后一个。请参见下面的代码和屏幕截图。
该图将包含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.
第一图单个0行
identifier : @"nullLine"
name: nullPlot
第二个图我已存储的数据散点图
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
函数:注意:我只添加此功能来完成-绝对会100%返回两个图的正确值!
-(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;
}
这是
numberOfRecordsForPlot
方法:注意这两个图都有相同数量的记录。这也将返回正确的数字。
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot{
return [dataHandler getDayNumber:[NSDate date]].intValue;
}
旁注不介意地块的格式;-)
最佳答案
我在一个测试应用程序中尝试了您的代码,并且效果很好-都显示了两个图。您的代码中肯定还有其他情况。
关于iphone - coreplot 2图中的图,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/9819761/