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を使用してプロット記号をクリックすると注釈が表示されるようにしましたplotSymbolWasSelectedAtRecordIndexが、一部のプロット記号では非常に遠くに表示され、一部では記号の近くに表示されます。たとえば、グラフの最小点をクリックすると、CTPPlotSpaceAnnotiation点の近くではなく、画面の左側に が表示されます。

編集：問題が何であるかを理解しました。NSNumber x は値を取得しません。変数の日付は NSString であり、NSDate に変換してから NSNumber に変換する必要があると思います。変数のアンカー ポイントで使用するために、変数の日付から月数を取得する必要がありますか? 注釈がプロット シンボルの近くに表示されるようにします。

別の編集: 上記のように、NSString の日付を NSDate に変換してから NSNumber に変換しました。今デバッグすると、考えられる日数が表示されます。しかし、プロット記号をクリックすると、注釈が表示されなくなりました。たとえば、日付が 07.2010 の場合、x は値 299624400.0 を取得し、注釈は機能しなくなります。

これはコードです：

-(void)scatterPlot:(CPTScatterPlot *)plot plotSymbolWasSelectedAtRecordIndex:(NSUInteger)index
{
    if ( symbolTextAnnotation ) {
        [graph.plotAreaFrame.plotArea removeAnnotation:symbolTextAnnotation];
        symbolTextAnnotation = nil;
    }

    // Setup a style for the annotation
    CPTMutableTextStyle *hitAnnotationTextStyle = [CPTMutableTextStyle textStyle];
    hitAnnotationTextStyle.color    = [CPTColor whiteColor];
    hitAnnotationTextStyle.fontSize = 16.0f;
    hitAnnotationTextStyle.fontName = @"Helvetica-Bold";

    // Determine point of symbol in plot coordinates
    NSNumber *x          = [[CPDStockPriceStore sharedInstance].dates objectAtIndex:index];
    NSNumber *y          = [[CPDStockPriceStore sharedInstance].prices objectAtIndex:index];
    NSArray *anchorPoint = [NSArray arrayWithObjects:x, y, nil];

    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
    [formatter setMaximumFractionDigits:2];
    NSString *currentValue = [formatter stringFromNumber:[[CPDStockPriceStore sharedInstance].prices objectAtIndex:index]];
    currentValue = [currentValue stringByAppendingString:@"-"];

    NSString *currentValue1 = [[CPDStockPriceStore sharedInstance].dates objectAtIndex:index];

    // Now add the annotation to the plot area
    CPTTextLayer *textLayer = [[CPTTextLayer alloc] initWithText:[currentValue stringByAppendingString:currentValue1] style:hitAnnotationTextStyle];
    symbolTextAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:graph.defaultPlotSpace anchorPlotPoint:anchorPoint];
    symbolTextAnnotation.contentLayer = textLayer;
    symbolTextAnnotation.displacement = CGPointMake(0.0f, 10.0f);
    [graph.plotAreaFrame.plotArea addAnnotation:symbolTextAnnotation];

}

これは、プロット、x 軸、y 軸のコードです: -(void)configurePlots {

// 1 - Get graph and plot space
graph = self.hostView.hostedGraph;
plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
// 2 - Create the three plots

aaplPlot = [[CPTScatterPlot alloc] init];
aaplPlot.dataSource = self;

aaplPlot.delegate = self;
aaplPlot.plotSymbolMarginForHitDetection = 20.0f;

aaplPlot.identifier = CPDTickerSymbolAAPL;
CPTColor *aaplColor = [CPTColor redColor];
[graph addPlot:aaplPlot toPlotSpace:plotSpace];

msftPlot = [[CPTScatterPlot alloc] init];
msftPlot.dataSource = self;
msftPlot.identifier = CPDTickerSymbolMSFT;
CPTColor *msftColor = [CPTColor clearColor];
[graph addPlot:msftPlot toPlotSpace:plotSpace];
// 3 - Set up plot space

NSArray *array = [[NSArray alloc] initWithObjects:aaplPlot, msftPlot, nil];
[plotSpace scaleToFitPlots:array];

CPTMutablePlotRange *xRange = [plotSpace.xRange mutableCopy];
[xRange expandRangeByFactor:CPTDecimalFromCGFloat(1.1f)];
plotSpace.xRange = xRange;
CPTMutablePlotRange *yRange = [plotSpace.yRange mutableCopy];
[yRange expandRangeByFactor:CPTDecimalFromCGFloat(1.2f)];
plotSpace.yRange = yRange;

// 4 - Create styles and symbols
CPTMutableLineStyle *aaplLineStyle = [aaplPlot.dataLineStyle mutableCopy];
aaplLineStyle.lineWidth = 2.5;
aaplLineStyle.lineColor = aaplColor;
aaplPlot.dataLineStyle = aaplLineStyle;
CPTMutableLineStyle *aaplSymbolLineStyle = [CPTMutableLineStyle lineStyle];
aaplSymbolLineStyle.lineColor = aaplColor;
CPTPlotSymbol *aaplSymbol = [CPTPlotSymbol ellipsePlotSymbol];
aaplSymbol.fill = [CPTFill fillWithColor:aaplColor];
aaplSymbol.lineStyle = aaplSymbolLineStyle;
aaplSymbol.size = CGSizeMake(6.0f, 6.0f);
aaplPlot.plotSymbol = aaplSymbol;

}

-(void)configureAxes {

// 1 - Create styles
CPTMutableTextStyle *axisTitleStyle = [CPTMutableTextStyle textStyle];
axisTitleStyle.color = [CPTColor whiteColor];
axisTitleStyle.fontName = @"Helvetica-Bold";
axisTitleStyle.fontSize = 12.0f;
CPTMutableLineStyle *axisLineStyle = [CPTMutableLineStyle lineStyle];
axisLineStyle.lineWidth = 2.0f;
axisLineStyle.lineColor = [CPTColor whiteColor];
CPTMutableTextStyle *axisTextStyle = [[CPTMutableTextStyle alloc] init];
axisTextStyle.color = [CPTColor whiteColor];
axisTextStyle.fontName = @"Helvetica-Bold";
axisTextStyle.fontSize = 11.0f;
CPTMutableLineStyle *tickLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor whiteColor];
tickLineStyle.lineWidth = 2.0f;
CPTMutableLineStyle *gridLineStyle = [CPTMutableLineStyle lineStyle];
tickLineStyle.lineColor = [CPTColor blackColor];
tickLineStyle.lineWidth = 1.0f;
// 2 - Get axis set
CPTXYAxisSet *axisSet = (CPTXYAxisSet *) self.hostView.hostedGraph.axisSet;
// 3 - Configure x-axis
CPTAxis *x = axisSet.xAxis;
x.title = @"Ziua Lunii";
x.titleTextStyle = axisTitleStyle;
x.titleOffset = 15.0f;
x.axisLineStyle = axisLineStyle;
x.labelingPolicy = CPTAxisLabelingPolicyNone;
x.labelTextStyle = axisTextStyle;
x.majorTickLineStyle = axisLineStyle;
x.majorTickLength = 4.0f;
x.tickDirection = CPTSignNegative;
CGFloat dateCount = [[[CPDStockPriceStore sharedInstance] datesInMonth] count];
NSMutableSet *xLabels = [NSMutableSet setWithCapacity:dateCount];
NSMutableSet *xLocations = [NSMutableSet setWithCapacity:dateCount];
NSInteger i = 0;

for (NSString *date in [[CPDStockPriceStore sharedInstance] datesInMonth]) {
    CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:date textStyle:x.labelTextStyle];
    label.rotation = M_PI/4;
    CGFloat location = i++;
    label.tickLocation = CPTDecimalFromCGFloat(location);
    label.offset = x.majorTickLength;
    if (label) {
        [xLabels addObject:label];
        [xLocations addObject:[NSNumber numberWithFloat:location]];
    }
}
x.axisLabels = xLabels;
x.majorTickLocations = xLocations;
// 4 - Configure y-axis
CPTAxis *y = axisSet.yAxis;
y.title = @"Pret";
y.titleTextStyle = axisTitleStyle;
y.titleOffset = -50.0f;
y.axisLineStyle = axisLineStyle;
y.majorGridLineStyle = gridLineStyle;
y.labelingPolicy = CPTAxisLabelingPolicyNone;
y.labelTextStyle = axisTextStyle;
y.labelOffset = 23.0f;
y.majorTickLineStyle = axisLineStyle;
y.majorTickLength = 4.0f;
y.minorTickLength = 2.0f;
y.tickDirection = CPTSignPositive;
NSInteger majorIncrement = 100;
NSInteger minorIncrement = 50;
CGFloat yMax = 1300.0f;  // should determine dynamically based on max price
NSMutableSet *yLabels = [NSMutableSet set];
NSMutableSet *yMajorLocations = [NSMutableSet set];
NSMutableSet *yMinorLocations = [NSMutableSet set];
for (NSInteger j = minorIncrement; j <= yMax; j += minorIncrement) {
    NSUInteger mod = j % majorIncrement;
    if (mod == 0) {
        CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithText:[NSString stringWithFormat:@"%i", j] textStyle:y.labelTextStyle];
        NSDecimal location = CPTDecimalFromInteger(j);
        label.tickLocation = location;
        label.offset = - y.majorTickLength - y.labelOffset;
        if (label) {
            [yLabels addObject:label];
        }
        [yMajorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:location]];
    } else {
        [yMinorLocations addObject:[NSDecimalNumber decimalNumberWithDecimal:CPTDecimalFromInteger(j)]];
    }
}
y.axisLabels = yLabels;
y.majorTickLocations = yMajorLocations;
y.minorTickLocations = yMinorLocations;

}
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1 に答える 1

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x値にデータインデックスを使用しているようです。これは簡単; 日付を変換する必要はまったくありません：

NSNumber *x = [NSNumber numberWithUnsignedInteger:index];
于 2012-12-20T00:27:44.473 に答える