使用核心情节在iPhone上实时绘图？ [英] real time plotting on iPhone using core plot?

问题描述

我想使用核心图来动态绘制线图。数据不会一次出现，我们将逐点接收。

I want to use core-plot for drawing line graph dynamically. data won't come at a time, we will be receiving point by point dynamically.

是否可以使用核心绘图动态绘制图表，即逐点绘制当我们收到（x，y）点时？

Is it possible to draw the chart dynamically using core-plot i.e drawing point by point as on when we receive the (x,y) point?

请帮助我，谢谢。

推荐答案

是的，你可以很容易地做到这一点。对于每个接收的数据点，将其附加到要显示的值数组。当这些数据点进入时，在Core Plot图（或者只是特定的图）上调用 -reloadData 来重绘图形，传入刚刚添加了值的数组响应 -numbersForPlot：字段：recordIndexRange：委托方法。

Yes, you can do this reasonably easily. For each received data point, append it to an array of values to display. As these data points come in, call -reloadData on the Core Plot graph (or just the particular plot) to redraw the graph, passing in the array you just added a value to in response to the -numbersForPlot:field:recordIndexRange: delegate method.

如果需要调整绘图范围跟踪您的数据点（对于移动的滚动条），重新计算X轴的新CPPlotRange并将绘图空间的 xRange 属性设置为该值。

If you need to adjust the plot range to track your data points (for a moving ticker), recalculate the new CPPlotRange for the X axis and set the plot space's xRange property to that.

使用 CPTestApp-iPhone ， AAPLot 或 StockPlot 示例作为模板如何整体设置折线图，并从该起点进行修改。

Use the CPTestApp-iPhone, AAPLot, or StockPlot examples as templates for how to set up the line chart overall, and modify from that starting point.

我做的事情si通过科学应用程序在Mac上对此进行了测试：
alt text http： //www.sunsetlakesoftware.com/sites/default/files/SensingInAirAgain.jpg

I do something similar to this on the Mac in a scientific application: alt text http://www.sunsetlakesoftware.com/sites/default/files/SensingInAirAgain.jpg

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