我几个月来一直在快速开发应用程序,但我不知道如何将数据传递到图表。因此,基本上我所拥有的是一个内部带有数组的视图控制器以及一个包含图表的UIView。我想做的是,UIView中的图形在ViewController中绘制数组。所以我想要的是将视图控制器中数组dataMoneyTracker1中的数据传递到UIView中的数组graphPoints,或者我可以从uiview中访问视图控制器中的数组。
感谢您的回答!
这是我的代码:
视图控制器
import UIKit
class GonDetail2ViewController: UIViewController {
var dataMoneyTracker1 = [Int]()
@IBOutlet var View1: UIView!
}
UIVIEW
import UIKit
class GonGraphUIView: UIView {
var graphPoints = [Int]()
override func drawRect(rect: CGRect) {
let width = rect.width
let height = rect.height
let margin:CGFloat = 20.0
let columnXPoint = { (column:Int) -> CGFloat in
//Calculate gap between points
let spacer = (width - margin*2 - 4) /
CGFloat((self.graphPoints.count - 1))
var x:CGFloat = CGFloat(column) * spacer
x += margin + 2
return x
}
let topBorder:CGFloat = 60
let bottomBorder:CGFloat = 50
let graphHeight = height - topBorder - bottomBorder
let maxValue = graphPoints.maxElement()
let columnYPoint = { (graphPoint:Int) -> CGFloat in
var y:CGFloat = CGFloat(graphPoint) /
CGFloat(maxValue!) * graphHeight
y = graphHeight + topBorder - y // Flip the graph
return y
}
UIColor.whiteColor().setFill()
UIColor.whiteColor().setStroke()
//set up the points line
let graphPath = UIBezierPath()
//go to start of line
graphPath.moveToPoint(CGPoint(x:columnXPoint(0),
y:columnYPoint(graphPoints[0])))
//add points for each item in the graphPoints array
//at the correct (x, y) for the point
for i in 1..<graphPoints.count {
let nextPoint = CGPoint(x:columnXPoint(i),
y:columnYPoint(graphPoints[i]))
graphPath.addLineToPoint(nextPoint)
}
graphPath.stroke()
graphPath.lineWidth = 2.0
graphPath.stroke()
//Draw the circles on top of graph stroke
for i in 0..<graphPoints.count {
var point = CGPoint(x:columnXPoint(i), y:columnYPoint(graphPoints[i]))
point.x -= 5.0/2
point.y -= 5.0/2
let circle = UIBezierPath(ovalInRect:
CGRect(origin: point,
size: CGSize(width: 5.0, height: 5.0)))
circle.fill()
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect) {
// Drawing code
}
*/
}
}
最佳答案
可以使用以下变量重新定义UIViewController:
@IBOutlet var View1: GonGraphUIView!
并在
GonGraphUIView
中var graphPoints:[Int]?
然后在
drawRect
if let graphPoints = graphPoints {
// draw the graph
} else { do nothing }
所以UIViewController可以说
View1.graphPoints = dataMoneyTracker1
View1.setneedsDisplay()