【发布时间】：2017-07-24 17:47:46
【问题描述】：
我正在尝试制作类似的东西
我将有4个BarChartDataSets分组，2个LineChartDataSets，每个数据集有7个数据点，用户可以随意添加或删除这些数据集
条形图似乎分组良好，折线图显示所有 7 个点
但是当我在图表中添加更多 BarChartDataSets 时，条形图离开图表的右侧，折线图保持不变，这是我的图像序列，从单个 LineChartDataSet 开始，然后逐个添加 BarChartDataSets ，有些条的值为0，所以很难看到组，在底部寻找0标签
如何阻止条形图离开图表右侧？
代码如下：
//get data and values from DataMOs in the activeFeeds
var lineChartDataSets = [LineChartDataSet]()
var barChartDataSets = [BarChartDataSet]()
for (key, dayValuesArray) in valuesByFeed {
var barChartDataEntries = [BarChartDataEntry]()
var lineChartDataEntries = [ChartDataEntry]()
var lineChartDataSet: LineChartDataSet!
var barChartDataSet: BarChartDataSet!
var dataEntry: ChartDataEntry
for (index, value) in (dayValuesArray?.enumerated())! {
//create line chart for Demand and Prod feeds
//create bar chart for every other feed
if key == "Demand" || key == "Prod"{
dataEntry = ChartDataEntry(x: Double(self.activeFeeds.count * index), y: Double(value)!)
lineChartDataEntries.append(dataEntry)
} else {
dataEntry = BarChartDataEntry(x: Double(self.activeFeeds.count * index), y: Double(value)!)
barChartDataEntries.append(dataEntry as! BarChartDataEntry)
}
}
//create line chart data set for Demand and Prod feeds
//create bar chart data set for every other feed
if key == "Demand" || key == "Prod"{
lineChartDataSet = LineChartDataSet(values: lineChartDataEntries, label: key)
lineChartDataSet.drawCirclesEnabled = false
} else {
barChartDataSet = BarChartDataSet(values: barChartDataEntries, label: key)
}
switch key {
case "Solar":
barChartDataSet.setColors(UIColor.orange.withAlphaComponent(1.0))
barChartDataSet.valueTextColor = UIColor.white
break
case "Wind":
barChartDataSet.setColors(UIColor.blue.withAlphaComponent(1.0))
barChartDataSet.valueTextColor = UIColor.white
break
case "Battery":
barChartDataSet.setColors(UIColor.green.withAlphaComponent(1.0))
barChartDataSet.valueTextColor = UIColor.white
break
case "Gen":
barChartDataSet.setColors(UIColor.red.withAlphaComponent(1.0))
barChartDataSet.valueTextColor = UIColor.white
break
case "Demand":
lineChartDataSet.setColors(UIColor.purple.withAlphaComponent(1.0))
lineChartDataSet.valueTextColor = UIColor.white
lineChartDataSet.drawFilledEnabled = true
lineChartDataSet.fillColor = UIColor.purple.withAlphaComponent(0.8)
break
case "Prod":
lineChartDataSet.setColors(UIColor.magenta.withAlphaComponent(1.0))
lineChartDataSet.valueTextColor = UIColor.white
lineChartDataSet.drawFilledEnabled = true
lineChartDataSet.fillColor = UIColor.magenta.withAlphaComponent(0.8)
break
default:
break
}
//append to correct data set array
if key == "Demand" || key == "Prod"{
lineChartDataSets.append(lineChartDataSet)
} else {
barChartDataSets.append(barChartDataSet)
}
}
//set chart data
let chartData = CombinedChartData()
chartData.barData = BarChartData(dataSets: barChartDataSets)
chartData.lineData = LineChartData(dataSets: lineChartDataSets)
let activeFeedsCount = self.activeFeeds.count
if activeFeedsCount > 0 {
self.combinedChartView.data = chartData
if chartData.barData.dataSetCount > 1 {
self.combinedChartView.barData?.groupBars(fromX: 0, groupSpace: 1.0, barSpace: 0.5)
self.combinedChartView.notifyDataSetChanged()
}
} else {
self.combinedChartView.data = CombinedChartData()
self.combinedChartView.noDataText = "No Feeds To Show"
}
【问题讨论】：
-
使用 setVisibleXRange 可以解决问题，看看我的这个答案：stackoverflow.com/a/44852890/5881884 如果它不能解决它，你能分享一些代码让我重现问题吗？
-
似乎不起作用，我添加了我正在使用的代码，它基本上是过去 7 天的数据点，将有 7 组 4 个条形图和 2 个具有 7 个数据点的折线图每个
-
从上面的代码中可以看出，我已经在尝试使用它了，改变它的值没有任何作用
标签： ios charts bar-chart linechart ios-charts