iOS 圖表庫：SwiftCharts

wiftCharts for iOS 是基于圖層的圖表庫。

特性列表：

• Bars - plain, stacked, grouped, horizontal, vertical
• Scatter
• Line / Multiple lines
• Areas
• Bubble
• Multiple axis
• Custom units
• Custom views
• Multiple labels (x axis)
• Candlestick
• Cubic line
• Complex interactivity support
• Easy extensibility
</ul>

Swift 1.2, iOS 7/8



let labelSettings = ChartLabelSettings(font: ExamplesDefaults.labelFont)

let chartPoints = [(2, 2), (3, 1), (5, 9), (6, 7), (8, 10), (9, 9), (10, 15), (13, 8), (15, 20), (16, 17)].map{ChartPoint(x: ChartAxisValueInt($0.0), y: ChartAxisValueInt($0.1))}

let xValues = Array(stride(from: 2, through: 16, by: 2)).map {ChartAxisValueInt($0, labelSettings: labelSettings)}
let yValues = Array(stride(from: 0, through: 20, by: 2)).map {ChartAxisValueInt($0, labelSettings: labelSettings)}

let xModel = ChartAxisModel(axisValues: xValues, axisTitleLabel: ChartAxisLabel(text: "Axis title", settings: labelSettings))
let yModel = ChartAxisModel(axisValues: yValues, axisTitleLabel: ChartAxisLabel(text: "Axis title", settings: labelSettings))
let chartFrame = ExamplesDefaults.chartFrame(self.view.bounds)

let chartSettings = ExamplesDefaults.chartSettings
let coordsSpace = ChartCoordsSpaceLeftBottomSingleAxis(chartSettings: chartSettings, chartFrame: chartFrame, xModel: xModel, yModel: yModel)
let (xAxis, yAxis, innerFrame) = (coordsSpace.xAxis, coordsSpace.yAxis, coordsSpace.chartInnerFrame)

// create layer with line
let lineModel = ChartLineModel(chartPoints: chartPoints, lineColor: UIColor(red: 0.4, green: 0.4, blue: 1, alpha: 0.2), lineWidth: 3, animDuration: 0.7, animDelay: 0)
let chartPointsLineLayer = ChartPointsLineLayer(xAxis: xAxis, yAxis: yAxis, innerFrame: innerFrame, lineModels: [lineModel])

// view generator - creates circle view for each chartpoint
let circleViewGenerator = {(chartPointModel: ChartPointLayerModel, layer: ChartPointsLayer, chart: Chart) -> UIView? in
    return ChartPointCircleView(center: chartPointModel.screenLoc, size: CGSizeMake(20, 20), settings: ChartPointCircleViewSettings(animDuration: 0.5))
}
// create layer that uses the view generator
let chartPointsCircleLayer = ChartPointsViewsLayer(xAxis: xAxis, yAxis: yAxis, innerFrame: innerFrame, chartPoints: chartPoints, viewGenerator: circleViewGenerator, displayDelay: 0, delayBetweenItems: 0.05)

// create layer with guidelines
var settings = ChartGuideLinesDottedLayerSettings(linesColor: UIColor.blackColor(), linesWidth: ExamplesDefaults.guidelinesWidth, axis: .XAndY)
let guidelinesLayer = ChartGuideLinesDottedLayer(xAxis: xAxis, yAxis: yAxis, innerFrame: innerFrame, settings: settings)

let chart = Chart(
    frame: chartFrame,
    layers: [
        xAxis,
        yAxis,
        guidelinesLayer,
        chartPointsLineLayer,
        chartPointsCircleLayer
    ]
)

self.view.addSubview(chart.view)
self.chart = chart




項目主頁：http://www.baiduhome.net/lib/view/home/1432716030035