Question

我尝试初始化并专注于我的屏幕下面的代码使用绘图代码，但我没有设法找到正确的方法总是给我一个错误

 import UIKit

 public class IndicadorCirculo : NSObject {

//// Drawing Methods

public class func drawCanvas2(#indicadro: CGFloat) {
    //// General Declarations
    let context = UIGraphicsGetCurrentContext()

    //// Color Declarations
    let optimo = UIColor(red: 0.350, green: 0.800, blue: 0.320, alpha: 1.000)

    //// Oval 2 Drawing
    var oval2Path = UIBezierPath(ovalInRect: CGRectMake(48, 107, 237, 244))
    optimo.setFill()
    oval2Path.fill()
    UIColor.blueColor().setStroke()
    oval2Path.lineWidth = 8
    oval2Path.stroke()


    //// Oval Drawing
    var ovalPath = UIBezierPath(ovalInRect: CGRectMake(91, 152, 151, 154))
    UIColor.whiteColor().setFill()
    ovalPath.fill()
    UIColor.blueColor().setStroke()
    ovalPath.lineWidth = 8
    ovalPath.stroke()


    //// Bezier Drawing
    var bezierPath = UIBezierPath()
    UIColor.blueColor().setStroke()
    bezierPath.lineWidth = 8
    bezierPath.stroke()


    //// Bezier 2 Drawing
    CGContextSaveGState(context)
    CGContextTranslateCTM(context, 166.57, 231.46)
    CGContextRotateCTM(context, -indicadro * CGFloat(M_PI) / 180)

    var bezier2Path = UIBezierPath()
    bezier2Path.moveToPoint(CGPointMake(0.43, -124.22))
    bezier2Path.addCurveToPoint(CGPointMake(0.43, -79.28), controlPoint1: CGPointMake(0.43, -77.68), controlPoint2: CGPointMake(0.43, -79.28))
    UIColor.darkGrayColor().setStroke()
    bezier2Path.lineWidth = 8
    bezier2Path.stroke()

    CGContextRestoreGState(context)
}

  }

  @objc protocol StyleKitSettableImage {
  func setImage(image: UIImage!)
 }

 @objc protocol StyleKitSettableSelectedImage {
func setSelectedImage(image: UIImage!)
}

我使用了init函数和框架不起作用，如果你能帮忙我很感激

感谢。

Answer 1

正如马特所说，你没有图形上下文。要在屏幕上显示您的圈子，您需要有一个UIView。 UIView中有一个方法drawRect（），只要需要绘制视图，就会自动调用该方法。（切勿直接在代码中调用drawRect（）。）

DrawRect（）使您可以访问视图的当前绘图上下文。

试试这个：

创建一个新的swift文件CirculoView作为UIView的子类。
在故事板中，将新的UIView添加到主视图中。将此UIView的类更改为CirculoView。
将CirculoView.swift更改为使用drawRect（）方法中的PaintCode代码。

这是代码

import UIKit

class CirculoView: UIView {

var indicadro:CGFloat = 0 {
  didSet {
    self.setNeedsDisplay()
  }
}

override func drawRect(rect: CGRect) {

  //// General Declarations
  let context = UIGraphicsGetCurrentContext()

  //// Color Declarations
  let optimo = UIColor(red: 0.350, green: 0.800, blue: 0.320, alpha: 1.000)

  //// Oval 2 Drawing
  var oval2Path = UIBezierPath(ovalInRect: CGRectMake(48, 107, 237, 244))
  optimo.setFill()
  oval2Path.fill()
  UIColor.blueColor().setStroke()
  oval2Path.lineWidth = 8
  oval2Path.stroke()


  //// Oval Drawing
  var ovalPath = UIBezierPath(ovalInRect: CGRectMake(91, 152, 151, 154))
  UIColor.whiteColor().setFill()
  ovalPath.fill()
  UIColor.blueColor().setStroke()
  ovalPath.lineWidth = 8
  ovalPath.stroke()


  //// Bezier Drawing
  var bezierPath = UIBezierPath()
  UIColor.blueColor().setStroke()
  bezierPath.lineWidth = 8
  bezierPath.stroke()


  //// Bezier 2 Drawing
  CGContextSaveGState(context)
  CGContextTranslateCTM(context, 166.57, 231.46)
  CGContextRotateCTM(context, -indicadro * CGFloat(M_PI) / 180)

  var bezier2Path = UIBezierPath()
  bezier2Path.moveToPoint(CGPointMake(0.43, -124.22))
  bezier2Path.addCurveToPoint(CGPointMake(0.43, -79.28), controlPoint1: CGPointMake(0.43, -77.68), controlPoint2: CGPointMake(0.43, -79.28))
  UIColor.darkGrayColor().setStroke()
  bezier2Path.lineWidth = 8
  bezier2Path.stroke()

  CGContextRestoreGState(context)
}
}

我只是跑了一下，在视图中看到了一个带蓝色笔划的绿色圆圈。

当我将代码初始化为paintcode？

1 个答案: