Swift Daniel Gindi图表库：仅为高亮显示的条形图绘制值标签
是否可以仅为高亮显示的条目绘制y值标签？像这样：Swift Daniel Gindi图表库：仅为高亮显示的条形图绘制值标签,swift,ios-charts,Swift,Ios Charts,是否可以仅为高亮显示的条目绘制y值标签？像这样： drawValuesEnabled=true绘制所有值标签，它们重叠且难以阅读。谢谢您提出这个问题 已经在折线图中完成了这种类型的自定义，还可以显示 但不幸的是，这个问题已经解决了 在条形图中添加标签的步骤 1） 转到BarChartRenderer 2） 发现 3） 将下面的代码放入for循环中 // Define your label code here // Put more code for label if requi
drawValuesEnabled=trueBarChartRendererfor // Define your label code here
// Put more code for label if require...
let lbl = UILabel()
lbl.text = "\(e.values)"
lbl.drawTextInRect(barRect)
internal func drawDataSet(context context: CGContext, dataSet: BarChartDataSet, index: Int)
{
guard let dataProvider = dataProvider, barData = dataProvider.barData else { return }
CGContextSaveGState(context)
let trans = dataProvider.getTransformer(dataSet.axisDependency)
let drawBarShadowEnabled: Bool = dataProvider.isDrawBarShadowEnabled
let dataSetOffset = (barData.dataSetCount - 1)
let groupSpace = barData.groupSpace
let groupSpaceHalf = groupSpace / 2.0
let barSpace = dataSet.barSpace
let barSpaceHalf = barSpace / 2.0
let containsStacks = dataSet.isStacked
let isInverted = dataProvider.isInverted(dataSet.axisDependency)
var entries = dataSet.yVals as! [BarChartDataEntry]
let barWidth: CGFloat = 0.5
let phaseY = _animator.phaseY
var barRect = CGRect()
var barShadow = CGRect()
var y: Double
// do the drawing
for (var j = 0, count = Int(ceil(CGFloat(dataSet.entryCount) * _animator.phaseX)); j < count; j++)
{
let e = entries[j]
// calculate the x-position, depending on datasetcount
let x = CGFloat(e.xIndex + e.xIndex * dataSetOffset) + CGFloat(index)
+ groupSpace * CGFloat(e.xIndex) + groupSpaceHalf
var vals = e.values
if (!containsStacks || vals == nil)
{
y = e.value
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top = isInverted ? (y <= 0.0 ? CGFloat(y) : 0) : (y >= 0.0 ? CGFloat(y) : 0)
var bottom = isInverted ? (y >= 0.0 ? CGFloat(y) : 0) : (y <= 0.0 ? CGFloat(y) : 0)
// multiply the height of the rect with the phase
if (top > 0)
{
top *= phaseY
}
else
{
bottom *= phaseY
}
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
if (!viewPortHandler.isInBoundsLeft(barRect.origin.x + barRect.size.width))
{
continue
}
if (!viewPortHandler.isInBoundsRight(barRect.origin.x))
{
break
}
// if drawing the bar shadow is enabled
if (drawBarShadowEnabled)
{
barShadow.origin.x = barRect.origin.x
barShadow.origin.y = viewPortHandler.contentTop
barShadow.size.width = barRect.size.width
barShadow.size.height = viewPortHandler.contentHeight
CGContextSetFillColorWithColor(context, dataSet.barShadowColor.CGColor)
CGContextFillRect(context, barShadow)
}
// Set the color for the currently drawn value. If the index is out of bounds, reuse colors.
let lbl = UILabel()
lbl.drawTextInRect(barRect)
CGContextSetFillColorWithColor(context, dataSet.colorAt(j).CGColor)
CGContextFillRect(context, barRect)
}
else
{
var posY = 0.0
var negY = -e.negativeSum
var yStart = 0.0
// if drawing the bar shadow is enabled
if (drawBarShadowEnabled)
{
y = e.value
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top = isInverted ? (y <= 0.0 ? CGFloat(y) : 0) : (y >= 0.0 ? CGFloat(y) : 0)
var bottom = isInverted ? (y >= 0.0 ? CGFloat(y) : 0) : (y <= 0.0 ? CGFloat(y) : 0)
// multiply the height of the rect with the phase
if (top > 0)
{
top *= phaseY
}
else
{
bottom *= phaseY
}
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
barShadow.origin.x = barRect.origin.x
barShadow.origin.y = viewPortHandler.contentTop
barShadow.size.width = barRect.size.width
barShadow.size.height = viewPortHandler.contentHeight
CGContextSetFillColorWithColor(context, dataSet.barShadowColor.CGColor)
CGContextFillRect(context, barShadow)
}
// fill the stack
for (var k = 0; k < vals!.count; k++)
{
let value = vals![k]
if value >= 0.0
{
y = posY
yStart = posY + value
posY = yStart
}
else
{
y = negY
yStart = negY + abs(value)
negY += abs(value)
}
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top: CGFloat, bottom: CGFloat
if isInverted
{
bottom = y >= yStart ? CGFloat(y) : CGFloat(yStart)
top = y <= yStart ? CGFloat(y) : CGFloat(yStart)
}
else
{
top = y >= yStart ? CGFloat(y) : CGFloat(yStart)
bottom = y <= yStart ? CGFloat(y) : CGFloat(yStart)
}
// multiply the height of the rect with the phase
top *= phaseY
bottom *= phaseY
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
if (k == 0 && !viewPortHandler.isInBoundsLeft(barRect.origin.x + barRect.size.width))
{
// Skip to next bar
break
}
// avoid drawing outofbounds values
if (!viewPortHandler.isInBoundsRight(barRect.origin.x))
{
break
}
// Set the color for the currently drawn value. If the index is out of bounds, reuse colors.
CGContextSetFillColorWithColor(context, dataSet.colorAt(k).CGColor)
CGContextFillRect(context, barRect)
}
}
// Define your label code here
let lbl = UILabel()
lbl.text = "\(e.values)"
lbl.drawTextInRect(barRect)
}
CGContextRestoreGState(context)
}
internal func drawDataSet（上下文：CGContext，数据集：BarChartDataSet，索引：Int）
{
guard let dataProvider=dataProvider，barData=dataProvider.barData else{return}
CGContextSaveGState（上下文）
let trans=dataProvider.getTransformer（dataSet.axisDependency）
让牵引杆hadowEnabled:Bool=dataProvider.isDrawBarShadowEnabled
让dataSetOffset=（barData.dataSetCount-1）
让groupSpace=barData.groupSpace
设groupSpaceHalf=groupSpace/2.0
设barSpace=dataSet.barSpace
设barSpaceHalf=barSpace/2.0
让containsStacks=dataSet.isStacked
让isInverted=dataProvider.isInverted（dataSet.axisDependency）
var entries=dataSet.yVals as！[BarChartDataEntry]
let barWidth:CGFloat=0.5
让phaseY=\u animator.phaseY
var barRect=CGRect（）
var barShadow=CGRect（）
变量y：双
//画画
对于（var j=0，count=Int（ceil（CGFloat（dataSet.entryCount）*\u animator.phaseX））；j=0.0？CGFloat（y）：0）：（y 0）
{
顶部*=相位
}
其他的
{
底部*=相位
}
barRect.origin.x=左
barRect.size.width=右-左
barRect.origin.y=顶部
barRect.size.height=底部-顶部
trans.rectValueToPixel（&barRect）
if（！viewPortHandler.isInBoundsLeft（barRect.origin.x+barRect.size.width））
{
持续
}
如果（！viewPortHandler.isInBoundsRight（barRect.origin.x））
{
打破
}
//如果启用了绘制条形阴影
如果（牵引杆已启用）
{
barShadow.origin.x=barRect.origin.x
barShadow.origin.y=viewPortHandler.contentTop
barShadow.size.width=barRect.size.width
barShadow.size.height=viewPortHandler.contentHeight
CGContextSetFillColorWithColor（上下文，dataSet.barShadowColor.CGColor）
CGContextFillRect（上下文，barShadow）
}
//为当前绘制的值设置颜色。如果索引超出范围，请重新使用颜色。
设lbl=UILabel（）
lbl.drawTextInRect（barRect）
CGContextSetFillColorWithColor（上下文，dataSet.colorAt（j）.CGColor）
CGContextFillRect（上下文，barRect）
}
其他的
{
var posY=0.0
var negY=-e.negativeSum
var yStart=0.0
//如果启用了绘制条形阴影
如果（牵引杆已启用）
{
y=e.值
设left=x-条形宽度+条形半空间
设right=x+barWidth-barSpaceHalf
var top=isInverted？（y=0.0？CGFloat（y）：0）
var bottom=isInverted？（y>=0.0？CGFloat（y）：0）：（y 0）
{
顶部*=相位
}
其他的
{
底部*=相位
}
barRect.origin.x=左
barRect.size.width=右-左
barRect.origin.y=顶部
barRect.size.height=底部-顶部
trans.rectValueToPixel（&barRect）
barShadow.origin.x=barRect.origin.x
barShadow.origin.y=viewPortHandler.contentTop
barShadow.size.width=barRect.size.width
barShadow.size.height=viewPortHandler.contentHeight
CGContextSetFillColorWithColor（上下文，dataSet.barShadowColor.CGColor）
CGContextFillRect（上下文，barShadow）
}
//堆满
对于（变量k=0；k=0.0
{
y=posY
yStart=posY+value
posY=yStart
}
其他的
{
y=负
yStart=negY+abs（值）
negY+=abs（值）
}
设left=x-条形宽度+条形半空间
设右=x+ba
internal func drawDataSet(context context: CGContext, dataSet: BarChartDataSet, index: Int)
{
guard let dataProvider = dataProvider, barData = dataProvider.barData else { return }
CGContextSaveGState(context)
let trans = dataProvider.getTransformer(dataSet.axisDependency)
let drawBarShadowEnabled: Bool = dataProvider.isDrawBarShadowEnabled
let dataSetOffset = (barData.dataSetCount - 1)
let groupSpace = barData.groupSpace
let groupSpaceHalf = groupSpace / 2.0
let barSpace = dataSet.barSpace
let barSpaceHalf = barSpace / 2.0
let containsStacks = dataSet.isStacked
let isInverted = dataProvider.isInverted(dataSet.axisDependency)
var entries = dataSet.yVals as! [BarChartDataEntry]
let barWidth: CGFloat = 0.5
let phaseY = _animator.phaseY
var barRect = CGRect()
var barShadow = CGRect()
var y: Double
// do the drawing
for (var j = 0, count = Int(ceil(CGFloat(dataSet.entryCount) * _animator.phaseX)); j < count; j++)
{
let e = entries[j]
// calculate the x-position, depending on datasetcount
let x = CGFloat(e.xIndex + e.xIndex * dataSetOffset) + CGFloat(index)
+ groupSpace * CGFloat(e.xIndex) + groupSpaceHalf
var vals = e.values
if (!containsStacks || vals == nil)
{
y = e.value
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top = isInverted ? (y <= 0.0 ? CGFloat(y) : 0) : (y >= 0.0 ? CGFloat(y) : 0)
var bottom = isInverted ? (y >= 0.0 ? CGFloat(y) : 0) : (y <= 0.0 ? CGFloat(y) : 0)
// multiply the height of the rect with the phase
if (top > 0)
{
top *= phaseY
}
else
{
bottom *= phaseY
}
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
if (!viewPortHandler.isInBoundsLeft(barRect.origin.x + barRect.size.width))
{
continue
}
if (!viewPortHandler.isInBoundsRight(barRect.origin.x))
{
break
}
// if drawing the bar shadow is enabled
if (drawBarShadowEnabled)
{
barShadow.origin.x = barRect.origin.x
barShadow.origin.y = viewPortHandler.contentTop
barShadow.size.width = barRect.size.width
barShadow.size.height = viewPortHandler.contentHeight
CGContextSetFillColorWithColor(context, dataSet.barShadowColor.CGColor)
CGContextFillRect(context, barShadow)
}
// Set the color for the currently drawn value. If the index is out of bounds, reuse colors.
let lbl = UILabel()
lbl.drawTextInRect(barRect)
CGContextSetFillColorWithColor(context, dataSet.colorAt(j).CGColor)
CGContextFillRect(context, barRect)
}
else
{
var posY = 0.0
var negY = -e.negativeSum
var yStart = 0.0
// if drawing the bar shadow is enabled
if (drawBarShadowEnabled)
{
y = e.value
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top = isInverted ? (y <= 0.0 ? CGFloat(y) : 0) : (y >= 0.0 ? CGFloat(y) : 0)
var bottom = isInverted ? (y >= 0.0 ? CGFloat(y) : 0) : (y <= 0.0 ? CGFloat(y) : 0)
// multiply the height of the rect with the phase
if (top > 0)
{
top *= phaseY
}
else
{
bottom *= phaseY
}
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
barShadow.origin.x = barRect.origin.x
barShadow.origin.y = viewPortHandler.contentTop
barShadow.size.width = barRect.size.width
barShadow.size.height = viewPortHandler.contentHeight
CGContextSetFillColorWithColor(context, dataSet.barShadowColor.CGColor)
CGContextFillRect(context, barShadow)
}
// fill the stack
for (var k = 0; k < vals!.count; k++)
{
let value = vals![k]
if value >= 0.0
{
y = posY
yStart = posY + value
posY = yStart
}
else
{
y = negY
yStart = negY + abs(value)
negY += abs(value)
}
let left = x - barWidth + barSpaceHalf
let right = x + barWidth - barSpaceHalf
var top: CGFloat, bottom: CGFloat
if isInverted
{
bottom = y >= yStart ? CGFloat(y) : CGFloat(yStart)
top = y <= yStart ? CGFloat(y) : CGFloat(yStart)
}
else
{
top = y >= yStart ? CGFloat(y) : CGFloat(yStart)
bottom = y <= yStart ? CGFloat(y) : CGFloat(yStart)
}
// multiply the height of the rect with the phase
top *= phaseY
bottom *= phaseY
barRect.origin.x = left
barRect.size.width = right - left
barRect.origin.y = top
barRect.size.height = bottom - top
trans.rectValueToPixel(&barRect)
if (k == 0 && !viewPortHandler.isInBoundsLeft(barRect.origin.x + barRect.size.width))
{
// Skip to next bar
break
}
// avoid drawing outofbounds values
if (!viewPortHandler.isInBoundsRight(barRect.origin.x))
{
break
}
// Set the color for the currently drawn value. If the index is out of bounds, reuse colors.
CGContextSetFillColorWithColor(context, dataSet.colorAt(k).CGColor)
CGContextFillRect(context, barRect)
}
}
// Define your label code here
let lbl = UILabel()
lbl.text = "\(e.values)"
lbl.drawTextInRect(barRect)
}
CGContextRestoreGState(context)
}