Core Plot中DataSource和Delegate
最近探究在IOS中，折线图，饼图，柱形图等数据统计方面的显示和操作。
选择了开源的Core Plot框架
最近探究在IOS中，折线图，饼图，柱形图等数据统计方面的显示和操作。
选择了开源的Core Plot框架
现在将框架中的delegate和data source做一个简单的陈列，作为自己的备忘之用。
首先是delegate
1.<CPTAxisDelegate> 关于坐标系（轴线Axis）的delegate
(a) -(BOOL)axis:(CPTAxis *)axis shouldUpdateAxisLabelAtLocations:(NSSet *)locations
(b) -(BOOL)axis:(CPTAxis *)axis shouldUpdateMinorAxisLabelAtLocations:(NSSet *)locations
(c) -(void)axisDidRelabel:(CPTAxis *)axis
(d) -(BOOL)axisShouldRelabel:(CPTAxis *)axis
2.<CPTPlotSpaceDelegate> 关于点空间的delegate
(a) -(void)plotSpace:(CPTPlotSpace *)space didChangePlotRangeForCoordinate:(CPTCoordinate)coordinate
(b) -(BOOL)plotSpace:(CPTPlotSpace *)space shouldHandlePointingDeviceCancelledEvent:(id)event
(c) -(BOOL)plotSpace:(CPTPlotSpace *)space shouldHandelPointingDeviceDownEvent:(id) event atPoint:(CGPoint) point
(d) -(BOOL)plotSpace:(CPTPlotSpace *)space shouldHandlePointingDeviceDraggedEvent:(id) event atPoint:(CGPoint) point
(e) -(BOOL)plotSpace:(CPTPlotSpace *)space shouldHandelPointingDeviceUpEvent:(id) event atPoint:(CGPoint) point
(f) -(BOOL)plotSpace:(CPTPlotSpace *)space shouldScaleBy:(CGPoint) interactionScale aboutPoint:(CGPoint) interactionPoint
(g) -(CPTPlotRange *) plotSpace:(CPTPlotSpace *)space willChangePlotRangeTo:(CPTPlotRange *)newRange forCoordinate:(CPTCoordinate)coordinate
(h) -(CGpoint)plotSpace:(CPTPlotSpace *)space willDisplaceBy:(CGPoint) proposedDisplacementVector
3.<CPTLegendDelegate> 关于图例Legend的delegate
(a) -(BOOL)legend:(CPTLegend *)legend shouldDrawSwatchAtIndex:(NSUInteger)index forPlot:(CPTPlot *) plot inRect:(CGRect) rect inContext:(CGContextRef)context
4.<CPTBarPlotDelegate> 关于柱形图 Plot的delegate
(a) -(void)barPlot:(CPTBarPlot *)plot barWasSelectedAtRecordIndex:(NSUInteger) index
5.<CPTPieChartDelegate> 关于饼图的delegate
(a) -(void)pieChart:(CPTPieChart *) plot sliceWasSelectedAtRecordIndex:(NSUInteger )index
6.<CPTScatterPlotDelegate> 关于散列点的Scatter的delegate
(a) -(void)scatterPlot:(CPTScatterPlot *) plot plotSymbolWasSelectedAtRecordIndex:(NSUInteger )index
下面是几个data source
1.<CPTPlotDataSource>
(a) -(CPTNumericData *)dataForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange) indexRange
(b) -(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
(c) -(double)doubleForPlot:(CPTPlot *)plot field:(NSUInteger) fieldEnum recordIndex:(NSUInteger) index
(d) -(double *)doublesForPlot:(CPTPlot *) plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange
(e) -(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
(f) -(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
(g) -(NSArray *)numbersForPlot:(CPTPlot *) plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange
1.1<CPTBarPlotDataSource> 柱形图
1.2<CPTPieChartDataSource> 饼图
