IOS_使用core plot实现曲线图（可点击）

#import "CPTAnnotationHostLayer.h" #import "CPTDefinitions.h" #import "CPTNumericDataType.h" /// @file @class CPTLegend; @class CPTMutableNumericData; @class CPTNumericData; @class CPTPlot; @class CPTPlotArea; @class CPTPlotSpace; @class CPTPlotSpaceAnnotation; @class CPTPlotRange; @class CPTTextStyle; /// @ingroup plotBindingsAllPlots /// @{ extern NSString *const CPTPlotBindingDataLabels; /// @} /** * @brief Enumeration of cache precisions. **/ typedef enum _CPTPlotCachePrecision { CPTPlotCachePrecisionAuto, ///< Cache precision is determined automatically from the data. All cached data will be converted to match the last data loaded. CPTPlotCachePrecisionDouble, ///< All cached data will be converted to double precision. CPTPlotCachePrecisionDecimal ///< All cached data will be converted to @ref NSDecimal. } CPTPlotCachePrecision; #pragma mark - /** * @brief A plot data source. **/ @protocol CPTPlotDataSource<NSObject> /// @name Data Values /// @{ /** @brief @required The number of data points for the plot. * @param plot The plot. * @return The number of data points for the plot. **/ -(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot; @optional /** @brief @optional Gets a range of plot data for the given plot and field. * Implement one and only one of the optional methods in this section. * @param plot The plot. * @param fieldEnum The field index. * @param indexRange The range of the data indexes of interest. * @return An array of data points. **/ -(NSArray *)numbersForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange; /** @brief @optional Gets a plot data value for the given plot and field. * Implement one and only one of the optional methods in this section. * @param plot The plot. * @param fieldEnum The field index. * @param idx The data index of interest. * @return A data point. **/ -(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)idx; /** @brief @optional Gets a range of plot data for the given plot and field. * Implement one and only one of the optional methods in this section. * @param plot The plot. * @param fieldEnum The field index. * @param indexRange The range of the data indexes of interest. * @return A retained C array of data points. **/ -(double *)doublesForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange; /** @brief @optional Gets a plot data value for the given plot and field. * Implement one and only one of the optional methods in this section. * @param plot The plot. * @param fieldEnum The field index. * @param idx The data index of interest. * @return A data point. **/ -(double)doubleForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)idx; /** @brief @optional Gets a range of plot data for the given plot and field. * Implement one and only one of the optional methods in this section. * @param plot The plot. * @param fieldEnum The field index. * @param indexRange The range of the data indexes of interest. * @return A one-dimensional array of data points. **/ -(CPTNumericData *)dataForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndexRange:(NSRange)indexRange; /** @brief @optional Gets a range of plot data for all fields of the given plot simultaneously. * Implement one and only one of the optional methods in this section. * * The data returned from this method should be a two-dimensional array. It can be arranged * in row- or column-major order although column-major will load faster, especially for large arrays. * The array should have the same number of rows as the length of @par{indexRange}. * The number of columns should be equal to the number of plot fields required by the plot. * The column index (zero-based) corresponds with the field index. * The data type will be converted to match the @link CPTPlot::cachePrecision cachePrecision @endlink if needed. * * @param plot The plot. * @param indexRange The range of the data indexes of interest. * @return A two-dimensional array of data points. **/ -(CPTNumericData *)dataForPlot:(CPTPlot *)plot recordIndexRange:(NSRange)indexRange; /// @} /// @name Data Labels /// @{ /** @brief @optional Gets a range of data labels for the given plot. * @param plot The plot. * @param indexRange The range of the data indexes of interest. * @return An array of data labels. **/ -(NSArray *)dataLabelsForPlot:(CPTPlot *)plot recordIndexRange:(NSRange)indexRange; /** @brief @optional Gets a data label for the given plot. * This method will not be called if * @link CPTPlotDataSource::dataLabelsForPlot:recordIndexRange: -dataLabelsForPlot:recordIndexRange: @endlink * is also implemented in the datasource. * @param plot The plot. * @param idx The data index of interest. * @return The data label for the point with the given index. * If you return @nil, the default data label will be used. If you return an instance of NSNull, * no label will be shown for the index in question. **/ -(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)idx; /// @} @end #pragma mark - /** * @brief Plot delegate. **/ @protocol CPTPlotDelegate<NSObject> @optional /// @name Point Selection /// @{ /** @brief @optional Informs the delegate that a data label was * @if MacOnly clicked. @endif * @if iOSOnly touched. @endif * @param plot The plot. * @param idx The index of the * @if MacOnly clicked data label. @endif * @if iOSOnly touched data label. @endif **/ -(void)plot:(CPTPlot *)plot dataLabelWasSelectedAtRecordIndex:(NSUInteger)idx; /** @brief @optional Informs the delegate that a data label was * @if MacOnly clicked. @endif * @if iOSOnly touched. @endif * @param plot The plot. * @param idx The index of the * @if MacOnly clicked data label. @endif * @if iOSOnly touched data label. @endif * @param event The event that triggered the selection. **/ -(void)plot:(CPTPlot *)plot dataLabelWasSelectedAtRecordIndex:(NSUInteger)idx withEvent:(CPTNativeEvent *)event; /// @} /// @name Drawing /// @{ /** * @brief @optional Informs the delegate that plot drawing is finished. * @param plot The plot. **/ -(void)didFinishDrawing:(CPTPlot *)plot; /// @} @end #pragma mark - @interface CPTPlot : CPTAnnotationHostLayer { @private __cpt_weak id<CPTPlotDataSource> dataSource; NSString *title; CPTPlotSpace *plotSpace; BOOL dataNeedsReloading; NSMutableDictionary *cachedData; NSUInteger cachedDataCount; CPTPlotCachePrecision cachePrecision; BOOL needsRelabel; CGFloat labelOffset; CGFloat labelRotation; NSUInteger labelField; CPTTextStyle *labelTextStyle; NSFormatter *labelFormatter; NSRange labelIndexRange; NSMutableArray *labelAnnotations; CPTShadow *labelShadow; BOOL alignsPointsToPixels; } /// @name Data Source /// @{ @property (nonatomic, readwrite, cpt_weak_property) __cpt_weak id<CPTPlotDataSource> dataSource; /// @} /// @name Identification /// @{ @property (nonatomic, readwrite, copy) NSString *title; /// @} /// @name Plot Space /// @{ @property (nonatomic, readwrite, retain) CPTPlotSpace *plotSpace; /// @} /// @name Plot Area /// @{ @property (nonatomic, readonly, retain) CPTPlotArea *plotArea; /// @} /// @name Data Loading /// @{ @property (nonatomic, readonly, assign) BOOL dataNeedsReloading; /// @} /// @name Data Cache /// @{ @property (nonatomic, readonly, assign) NSUInteger cachedDataCount; @property (nonatomic, readonly, assign) BOOL doublePrecisionCache; @property (nonatomic, readwrite, assign) CPTPlotCachePrecision cachePrecision; @property (nonatomic, readonly, assign) CPTNumericDataType doubleDataType; @property (nonatomic, readonly, assign) CPTNumericDataType decimalDataType; /// @} /// @name Data Labels /// @{ @property (nonatomic, readonly, assign) BOOL needsRelabel; @property (nonatomic, read