Question

我有关键值对。键是String，值是整数。我想按降序对它进行排序，以便首先显示具有最高值的元素。

如何按降序对排序集进行排序？

Answer 1

您可以使用TreeMap执行此操作，例如：

LineCharts

如果您希望按值排序，那么您可以这样做：

// Create and set LineChart
        var lineChart = LineChartView()
        lineChart.descriptionText = ""
        lineChart.delegate = self
        lineChart.noDataTextDescription = "You need to provide data for the chart."
        lineChart.drawGridBackgroundEnabled = false
        lineChart.userInteractionEnabled = false
        lineChart.xAxis.drawAxisLineEnabled = false
        lineChart.xAxis.drawGridLinesEnabled = false
        lineChart.xAxis.drawLabelsEnabled = false
        lineChart.drawBordersEnabled = false
        lineChart.leftAxis.enabled = false
        lineChart.rightAxis.enabled = false
        lineChart.legend.enabled = false
        lineChart.contentMode = .ScaleAspectFill
        lineChart.autoresizingMask = UIViewAutoresizing.FlexibleWidth

如何按降序实现排序集？

1 个答案: