CoreGraphic Draw

skill.swift

    
    func genSkillImageWithSkills(skills: [Skill]) -> UIImage {
        
        let maxWidth:CGFloat = 170
        
        let marginTop:CGFloat = 3.0
        
        let marginLeft: CGFloat = 6.0
        
        let lineSpacing: CGFloat = 5.0
        
        let labelMargin: CGFloat = 5.0
        
        var skillLabels = [CGRect]()
        
        //let context = UIGraphicsGetCurrentContext()
        UIGraphicsBeginImageContextWithOptions(CGSize(width: maxWidth, height: 50), false, UIScreen.mainScreen().scale)
        
        for (index, skill) in skills.enumerate() {
            
            var skillLocal = skill.localName
            
            if index == 5 {
                break
            }
            
            if index == 4 {
                if skills.count > 4 && skills.count != 5 {
                    skillLocal = NSLocalizedString("\(skills.count-4) More...", comment: "")
                }
            }
            
            //// Text Drawing
            let textRect = CGRectMake(0, 0, 0, 14)
            let textTextContent = NSString(string: skillLocal)
            let textStyle = NSParagraphStyle.defaultParagraphStyle().mutableCopy() as! NSMutableParagraphStyle
            textStyle.alignment = .Center
            
            let textFontAttributes: [String: AnyObject] = {
                if index == 4 && skills.count != 5 {
                    return  [NSFontAttributeName: UIFont.systemFontOfSize(12), NSForegroundColorAttributeName: UIColor.yepTintColor(), NSParagraphStyleAttributeName: textStyle]
                } else {
                    return [NSFontAttributeName: UIFont.systemFontOfSize(12), NSForegroundColorAttributeName: UIColor.whiteColor(), NSParagraphStyleAttributeName: textStyle]
                }
            }()
            
            let textTextWidth: CGFloat = textTextContent.boundingRectWithSize(CGSizeMake(CGFloat.infinity, 12), options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: textFontAttributes, context: nil).size.width
            
            var rect = CGRectMake(0, marginTop, textTextWidth, textRect.height)
            
            var lastLabel: CGRect = rect
            
            if index > 0 {
                lastLabel = skillLabels[index - 1]
            }
            
            var x = lastLabel.origin.x + lastLabel.width + labelMargin * 2
            
            var y = lastLabel.origin.y
            
            if x + rect.width + marginLeft*2 > maxWidth {
                x = 0
                y = lastLabel.origin.y + lastLabel.height + lineSpacing + marginTop*2
            }
            
            if index == 0 {
                x = 0
                y = lastLabel.origin.y
            }
            
            rect = CGRectMake(x + marginLeft, y , rect.width, rect.height)
            
            let rectanglePath = UIBezierPath(roundedRect: CGRectMake(rect.origin.x - marginLeft, rect.origin.y - marginTop , textTextWidth + marginLeft * 2, textRect.height + marginTop*2), cornerRadius: (textRect.height + marginTop*2)*0.5)
            
            let fillColor: UIColor = {
                if index == 4 && skills.count != 5 {
                   return UIColor(red: 234/255.0, green: 246/255.0, blue: 255/255.0, alpha: 1.0)
                } else {
                   return UIColor.yepTintColor()
                }
            }()
            
            fillColor.setFill()
            
            rectanglePath.fill()
            
            skillLabels.append(rect)
            
            textTextContent.drawInRect(rect, withAttributes: textFontAttributes)
        }

        //CGContextSaveGState(context)
        //CGContextClipToRect(context, CGRectMake(0, 0, maxWidth, 50))
        //CGContextRestoreGState(context)
        
        let backgroundImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        
        return backgroundImage
    }