[Swift通天遁地]3、手勢與圖表-(13)製做美觀簡介的滾動圖表：折線圖表、面積圖表、柱形圖表、散點圖表

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目錄：[Swift]通天遁地Swift

本文將演示使用另外一個圖表類庫，製做美觀簡介的滾動圖表。

首先確保在項目中已經安裝了所需的第三方庫。

點擊【Podfile】,查看安裝配置文件。

1 platform :ios, '12.0'
2 use_frameworks!
3 
4 target 'DemoApp' do
5     source 'https://github.com/CocoaPods/Specs.git'
6     pod 'ScrollableGraphView'
7 end

根據配置文件中的相關配置，安裝第三方庫。

而後點擊打開【DemoApp.xcworkspace】項目文件。

爲了更好的顯示柱形圖標須要調整模擬器的朝向。

【DemoApp】->【General】

->【Device Orientation】取消勾選【Portrait】肖像選項，使模擬器保持橫向顯示。

在項目導航區，打開視圖控制器的代碼文件【ViewController.swift】

1.簡單的折線圖表

 1 import UIKit
 2 //首先在當前的類文件中，引入已經安裝的第三方類庫
 3 import ScrollableGraphView
 4 
 5 class ViewController: UIViewController {
 6 
 7     override func viewDidLoad() {
 8         super.viewDidLoad()
 9         // Do any additional setup after loading the view, typically from a nib.
10         
11         //簡單的折線圖表
12         buildSimpleChart()
13     }
14     
15     //添加一個方法，用來完成圖表的建立
16     func buildSimpleChart()
17     {
18         //初始化一個矩形區域對象
19         let frame = CGRect(x: 0, y: 40, width: 320, height: 180)
20         //建立一個指定顯示區域的可滾動視圖
21         let graphView = ScrollableGraphView(frame: frame)
22         
23         //建立一個數組，做爲圖表的數據源
24         let data: [Double] = [4, 48, 15, 16, 73, 42]
25         //建立另外一個數組，做爲圖表的水平軸方向的標籤
26         let labels = ["one", "two", "three", "four", "five", "six"]
27         
28         //設置可滾動圖形視圖的數據源和標題
29         graphView.set(data: data,//數據源
30                       withLabels: labels)//標題
31 
32         //將可滾動圖形視圖添加到根視圖              
33         self.view.addSubview(graphView)
34     }
35     
36     override func didReceiveMemoryWarning() {
37         super.didReceiveMemoryWarning()
38         // Dispose of any resources that can be recreated.
39     }
40 }

2.平滑曲線的面積圖表

 1 import UIKit
 2 //首先在當前的類文件中，引入已經安裝的第三方類庫
 3 import ScrollableGraphView
 4 
 5 class ViewController: UIViewController {
 6 
 7     override func viewDidLoad() {
 8         super.viewDidLoad()
 9         // Do any additional setup after loading the view, typically from a nib.
10         
11         //平滑曲線的面積圖表
12         buildSmoothDarkChart()
13     }
14     
15     //建立一個方法，用來建立一個暗調、平滑、可滾動的面積圖
16     func buildSmoothDarkChart()
17     {
18         //初始化一個矩形區域對象
19         let frame = CGRect(x: 0, y: 40, width: 320, height: 280)
20         //建立一個指定顯示區域的可滾動圖形視圖
21         let graphView = ScrollableGraphView(frame: frame)
22         
23         //設置圖形視圖的背景填充顏色
24         graphView.backgroundFillColor = UIColor(red: 51.0/255, green: 51.0/255, blue: 51.0/255, alpha: 1.0)
25         
26         //設置圖形視圖的最大值爲100，超過此值的數據將顯示再圖形以外
27         graphView.rangeMax = 100
28         
29         //設置線條的寬度爲1
30         graphView.lineWidth = 1
31         //設置線條的顏色
32         graphView.lineColor = UIColor(red: 119.0/255, green: 119.0/255, blue: 119.0/255, alpha: 1.0)
33         //設置線段的外觀爲平滑樣式，這樣繪製的曲線爲貝塞爾曲線
34         graphView.lineStyle = ScrollableGraphViewLineStyle.smooth
35         
36         //設置圖形支持填充模式，以繪製面積圖
37         graphView.shouldFill = true
38         //設置面積圖的填充模式爲漸變填充
39         graphView.fillType = ScrollableGraphViewFillType.gradient
40         //設置面積圖的填充的顏色
41         graphView.fillColor = UIColor(red: 85.0/255, green: 85.0/255, blue: 85.0/255, alpha: 1.0)
42         //設置漸變填充的類型爲線形漸變，除此以外還有徑向漸變樣式
43         graphView.fillGradientType = ScrollableGraphViewGradientType.linear
44         //設置漸變填充的起始顏色
45         graphView.fillGradientStartColor = UIColor(red: 85.0/255, green: 85.0/255, blue: 85.0/255, alpha: 1.0)
46         //設置漸變填充的結束顏色
47         graphView.fillGradientEndColor = UIColor(red: 68.0/255, green: 68.0/255, blue: 68.0/255, alpha: 1.0)
48         
49         //設置數據點之間的間距爲80
50         graphView.dataPointSpacing = 80
51         //設置數據點的大小爲2
52         graphView.dataPointSize = 2
53         //設置圖形視圖的數據點的顏色爲白色
54         graphView.dataPointFillColor = UIColor.white
55         
56         //設置參考線上的標籤字體，爲加粗的8號字體
57         graphView.referenceLineLabelFont = UIFont.boldSystemFont(ofSize: 8)
58         //設置參考線的顏色爲白色，顏色的透明度爲0.2
59         graphView.referenceLineColor = UIColor.white.withAlphaComponent(0.2)
60         //設置參考線上的標籤字體的顏色爲白色
61         graphView.referenceLineLabelColor = UIColor.white
62         //設置數據點的標籤字體的顏色爲白色，顏色的透明度爲0.5
63         graphView.dataPointLabelColor = UIColor.white.withAlphaComponent(0.5)
64         
65         //初始化一個數組，做爲圖表的數據
66         let data: [Double] = [4, 48, 15, 16, 73, 42]
67         //初始化一個數組，做爲水平軸上的標題
68         let labels = ["one", "two", "three", "four", "five", "six"]
69         
70         //設置圖形視圖的數據源和數據標籤
71         graphView.set(data: data, withLabels: labels)
72         //設置根視圖的背景顏色
73         self.view.backgroundColor = UIColor(red: 51.0/255, green: 51.0/255, blue: 51.0/255, alpha: 1.0)
74         //將圖形視圖添加到根視圖
75         self.view.addSubview(graphView)
76     }
77 
78     override func didReceiveMemoryWarning() {
79         super.didReceiveMemoryWarning()
80         // Dispose of any resources that can be recreated.
81     }
82 }

3.暗調主題的柱形圖表

 1 import UIKit
 2 //首先在當前的類文件中，引入已經安裝的第三方類庫
 3 import ScrollableGraphView
 4 
 5 class ViewController: UIViewController {
 6 
 7     override func viewDidLoad() {
 8         super.viewDidLoad()
 9         // Do any additional setup after loading the view, typically from a nib.
10         
11         //暗調主題的柱形圖表
12         barDarkChart()
13     }
14     
15     //添加一個方法，建立一個暗調的柱形圖表
16     func barDarkChart()
17     {
18         //初始化一個矩形區域對象
19         let frame = CGRect(x: 0, y: 40, width: 320, height: 280)
20         //建立一個指定顯示區域的可滾動視圖
21         let graphView = ScrollableGraphView(frame:frame)
22         
23         //設置圖形視圖容許繪製數據點
24         graphView.shouldDrawDataPoint = false
25         //設置圖形視圖的線條顏色爲無色
26         graphView.lineColor = UIColor.clear
27         //設置圖形視圖繪製柱形圖層
28         graphView.shouldDrawBarLayer = true
29         
30         //設置柱形的寬度爲25
31         graphView.barWidth = 25
32         //設置柱形線條的寬度爲1
33         graphView.barLineWidth = 1
34         //設置圖形線條的顏色
35         graphView.barLineColor = UIColor(red: 119.0/255, green: 119.0/255, blue: 119.0/255, alpha: 1.0)
36         //設置圖形自身的填充顏色
37         graphView.barColor = UIColor(red: 85.0/255, green: 85.0/255, blue: 85.0/255, alpha: 1.0)
38         //設置圖形視圖的背景填充顏色
39         graphView.backgroundFillColor = UIColor(red: 51.0/255, green: 51.0/255, blue: 51.0/255, alpha: 1.0)
40         
41         //設置圖形視圖的參考線的標籤字體
42         graphView.referenceLineLabelFont = UIFont.boldSystemFont(ofSize: 8)
43         //設置圖形視圖的參考線的線條顏色
44         graphView.referenceLineColor = UIColor.white.withAlphaComponent(0.2)
45         //設置圖形視圖的參考線的字體顏色
46         graphView.referenceLineLabelColor = UIColor.white
47         //設置數據點標籤顏色爲白色，透明度爲0.5
48         graphView.dataPointLabelColor = UIColor.white.withAlphaComponent(0.5)
49         //設置中間參考線的數量爲5，默認值爲3
50         graphView.numberOfIntermediateReferenceLines = 5
51         
52         //設置圖形視圖以動畫的方式顯示
53         graphView.shouldAnimateOnStartup = true
54         //設置垂直軸向的數據範圍爲自適應，以可以所有顯示全部的數據
55         graphView.shouldAdaptRange = true
56         //設置圖形視圖的動畫類型爲彈性樣式
57         graphView.adaptAnimationType = ScrollableGraphViewAnimationType.elastic
58         //設置動畫的時長爲1.5s
59         graphView.animationDuration = 1.5
60         //設置垂直軸向顯示範圍的最大值爲100，
61         //超出範圍以外的數據將顯示在圖形以外
62         graphView.rangeMax = 100
63         //設置圖形視圖的顯示範圍，七最小值始終保持爲0
64         graphView.shouldRangeAlwaysStartAtZero = true
65         
66         //設置可滾動圖形視圖的數據源
67         let data: [Double] = [4, 48, 15, 16, 73, 42]
68         //設置可滾動圖形視圖的標題
69         let labels = ["one", "two", "three", "four", "five", "six"]
70         
71         //設置圖形視圖的數據源和標題
72         graphView.set(data: data, withLabels: labels)
73         //設置圖形視圖的背景顏色
74         self.view.backgroundColor = UIColor(red: 51.0/255, green: 51.0/255, blue: 51.0/255, alpha: 1.0)
75         //最後將圖形視圖添加到根視圖
76         self.view.addSubview(graphView)
77     }
78 
79     override func didReceiveMemoryWarning() {
80         super.didReceiveMemoryWarning()
81         // Dispose of any resources that can be recreated.
82     }
83 }

4.藍色的散點圖表

 1 import UIKit
 2 //首先在當前的類文件中，引入已經安裝的第三方類庫
 3 import ScrollableGraphView
 4 
 5 class ViewController: UIViewController {
 6 
 7     override func viewDidLoad() {
 8         super.viewDidLoad()
 9         // Do any additional setup after loading the view, typically from a nib.
10         
11         //藍色的散點圖表
12         dotChart()
13     }
14     
15     //添加一個新方法，建立一個散點圖表
16     func dotChart()
17     {
18         //初始化一個矩形區域對象
19         let frame = CGRect(x: 0, y: 40, width: 320, height: 280)
20         //建立一個指定顯示區域的可滾動視圖
21         let graphView = ScrollableGraphView(frame:frame)
22         //設置圖形視圖的背景填充顏色
23         graphView.backgroundFillColor = UIColor(red: 0.0, green: 191.0/255, blue: 1.0, alpha: 1.0)
24         //設置圖形視圖的線條顏色
25         graphView.lineColor = UIColor.clear
26         
27         //設置圖形視圖的數據點的尺寸
28         graphView.dataPointSize = 5
29         //設置圖形視圖的數據點之間的距離
30         graphView.dataPointSpacing = 80
31         //設置數據點的標籤字體
32         graphView.dataPointLabelFont = UIFont.boldSystemFont(ofSize: 10)
33         //設置數據點的標籤顏色
34         graphView.dataPointLabelColor = UIColor.white
35         //設置數據點的填充顏色
36         graphView.dataPointFillColor = UIColor.white
37         
38         //設置圖形視圖參考線的標籤字體
39         graphView.referenceLineLabelFont = UIFont.boldSystemFont(ofSize: 10)
40         //設置圖形視圖參考線的線條顏色
41         graphView.referenceLineColor = UIColor.white.withAlphaComponent(0.5)
42         //設置圖形視圖參考線的標籤文字的顏色
43         graphView.referenceLineLabelColor = UIColor.white
44         //設置在圖形視圖中，參考線位於左右兩次
45         //參考線的位置共有【左、右、兩側】這三種格式
46         graphView.referenceLinePosition = ScrollableGraphViewReferenceLinePosition.both
47         
48         //設置中間參考線的數量爲9，默認的值爲3
49         graphView.numberOfIntermediateReferenceLines = 9
50         //設置垂直軸向顯示範圍的最大值爲100，
51         //超出範圍以外的數據將顯示在圖形以外
52         graphView.rangeMax = 100
53         
54         //初始化一個數組，做爲圖表的數據
55         let data: [Double] = [4, 48, 15, 16, 73, 42]
56         //初始化一個數組，做爲水平軸向的標題
57         let labels = ["one", "two", "three", "four", "five", "six"]
58         
59         //設置圖形視圖的數據源和標題信息
60         graphView.set(data: data, withLabels: labels)
61         //設置根視圖的背景顏色
62         self.view.backgroundColor = UIColor(red: 0.0, green: 191.0/255, blue: 1.0, alpha: 1.0)
63         //並將圖形視圖添加到根視圖
64         self.view.addSubview(graphView)
65     }
66     
67     override func didReceiveMemoryWarning() {
68         super.didReceiveMemoryWarning()
69         // Dispose of any resources that can be recreated.
70     }
71 }