Question

所以我有两个图块空间和一个图。一个是散点图，另一个是条形图。

目前，我已开启缩放（禁用Y轴）和平移的pan guest虚拟机识别器。

这是我的PlotSpace委托方法的代码。

#pragma mark -
#pragma mark PlotSpace Delegates

- (CGPoint)plotSpace:(CPTPlotSpace *)space willDisplaceBy:(CGPoint)proposedDisplacementVector{
    return CGPointMake(0, 0);

}

- (BOOL)plotSpace:(CPTPlotSpace *)space shouldScaleBy:(CGFloat)interactionScale aboutPoint:(CGPoint)interactionPoint {
    return YES;
}

- (CPTPlotRange *)plotSpace:(CPTPlotSpace *)space willChangePlotRangeTo:(CPTPlotRange *)newRange forCoordinate:(CPTCoordinate)coordinate {
    if (coordinate == CPTCoordinateX) {
        [self checkIfCluster];
        return [CPTPlotRange plotRangeWithLocation:newRange.location length:newRange.length];

    } else {
        if ([space.identifier  isEqual: @"barplotspace"]) {
            return [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0f) length:CPTDecimalFromFloat(10)]; //Look out for other one.

        }
            return [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0f) length:CPTDecimalFromFloat([self getMaxValue] * 1.25)]; //Look out for other one.

    }
    return nil;
}

- (void)plotSpace:(CPTPlotSpace *)space didChangePlotRangeForCoordinate:(CPTCoordinate)coordinate
{
    [self updateStats];
}

-(void)handlePan:(UIPanGestureRecognizer *)sender{

    CGPoint translation = [sender translationInView:self.view];

    CPTXYPlotSpace *space = (CPTXYPlotSpace *)[self.hostView.hostedGraph defaultPlotSpace];
    CGFloat movementDistance = space.xRange.lengthDouble / self.hostView.frame.size.width;
    if (translation.x > 0) {
        space.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(space.xRange.locationDouble - movementDistance * 30) length:space.xRange.length];

    } else {
        space.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(space.xRange.locationDouble + movementDistance * 30) length:space.xRange.length];

    }

}

但是，我还在创建时将两个plotspaces的委托设置为self（定义了这些方法）。正在从条形图空间调用willChangePlotRangeTo。不是willDisplaceBy或shouldScaleBy ...这是奇怪的。我错过了什么吗？

Answer 1

-plotSpace:willDisplaceBy:委托方法仅在使用内置事件处理进行平移时从-pointingDeviceDraggedEvent:atPoint:方法调用。

-plotSpace:shouldScaleBy:aboutPoint:委托方法仅从-scaleBy:aboutPoint:方法调用。内置捏合手势识别器使用此方法缩放绘图空间以响应手势。

Answer 2

我忘记打开允许用户在两个图块空间上进行交互。

在CorePlot中缩放和平移两个图块空间

2 个答案: