PROSAGA码农传奇-Sahara云大数据-如何在iOS中使用谷歌地图创建自定义标记视图

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      func customMarkerView(titleText : String, markerImg : UIImage) -> UIImage{
    let mainView : UIView = UIView()
    let subView : UIView = UIView()
    let padding : CGFloat = 8.0
    let rightImgView : UIImageView = UIImageView()
    let markerImgView : UIImageView = UIImageView()
    let cfont = UIFont(name: "Roboto-Regular", size: 16.0)
    //createing marker label.
    let titleLabel : UILabel = UILabel(frame: CGRect(x: 4.0, y: 4.0, width: 150.0, height: cfont!.lineHeight))
    titleLabel.lineBreakMode = .byWordWrapping
    titleLabel.font = cfont!
    titleLabel.text = titleText
    titleLabel.numberOfLines = 0
    titleLabel.sizeToFit()
    titleLabel.backgroundColor = UIColor.white
    let noLines = titleLabel.frame.size.height / cfont!.lineHeight

if noLines > 2{
        titleLabel.numberOfLines = 2
        titleLabel.frame = CGRect(x: 4.0, y: 4.0, width: titleLabel.frame.width, height: 2 * cfont!.lineHeight)
    }else{
        titleLabel.frame = CGRect(x: 4.0, y: 4.0, width: titleLabel.frame.width, height: 24.0)
    }

let rightArrow = UIImage(named: "right-arrow")
    rightImgView.frame = CGRect(x: titleLabel.frame.origin.x + titleLabel.frame.width + padding, y: 4.0, width: 24.0, height: titleLabel.frame.height)
    rightImgView.image = rightArrow!
    rightImgView.contentMode = .center

subView.addSubview(titleLabel)
    subView.addSubview(rightImgView)

subView.frame = CGRect(x: 0.0, y: 0.0, width: 2 * 4.0 + titleLabel.frame.width + padding + rightImgView.frame.width, height: 2 * 4.0 + titleLabel.frame.height)
    subView.backgroundColor = UIColor.white

markerImgView.frame = CGRect(x: subView.center.x - markerImg.size.width/2, y: subView.frame.height + 4.0, width: markerImg.size.width, height: markerImg.size.height)
    markerImgView.image = markerImg
    markerImgView.contentMode = .scaleAspectFit

mainView.addSubview(markerImgView)

mainView.frame = CGRect(x: 0.0, y: 0.0, width: subView.frame.width, height: subView.frame.height + 4.0 + markerImgView.frame.height)
    mainView.addSubview(subView)
    mainView.backgroundColor = UIColor.clear
    UIGraphicsBeginImageContextWithOptions(mainView.bounds.size, false, UIScreen.main.scale)
    mainView.layer.render(in: UIGraphicsGetCurrentContext()!)
    let icon : UIImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext()
    return icon
}

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