iOS开发使用iconfont，封装返回UILabel、UIImage、UIImageView

为啥使用iconfont 理由一堆，反正现在就让我用了。 纯色ICon，都用iconfont。

用的多，所以要封装一下。 iconfont可以用于UILabel显示，也可以是UIImage。 我这里封装了一个返回UILabel和UIImageView的，连同带点击事件。

刚开始网上找找有没有封装好的方法，一直都不太好用，干脆自己搞一个吧。

直接上代码

1. 先获取所有iconfont名称，后面方便直接用

public enum IconFontName: String {
    case downLoad = "\u{e60f}"
    case selectRight = "\u{e611}"
    case rightArrow = "\u{e612}"
    case closeIcon = "\u{e614}"
    case listIcon = "\u{e616}" 
    case avater = "\u{e617}"
    case backIcon = "\u{e618}"
    case feedback = "\u{e619}"
    case wrongIcon = "\u{e61b}" 
    case editIcon = "\u{e61c}"
    case warning = "\u{e610}"  
    case score = "\u{e60e}"
    case time = "\u{e60c}"
    case imageIcon = "\u{e60d}"
}

2.返回UILabel，带点击事件

class ExIconFont {

    class func iconFontToLabel(frame: CGRect = .zero, fontSize: CGFloat, fontName: String, iconName: String = "", action:(()->Void)?) -> UILabel 
        let lab = UILabel(frame: frame)
        lab.font = R.font.iconfont(size: fontSize)
        lab.text = fontName
        lab.isUserInteractionEnabled = true
        let tap = ClosureTapGestureRecognizer()
        lab.addGestureRecognizer(tap)
        tap.addAction { tap in
            guard let action = action else {
                return
            }
            action()
        }
        return lab
    }

3.返回UILabel有时候不行，那就在加封装返回一个UIImage 或者 UIImageView。 我这里直接返回了UIImageView， 方便使用。

class func iconfontToImage(iconText: String, fontSize: CGFloat, fontColor: UIColor, action:(()->Void)?) -> UIImageView {
        // 这里我使用的R.Swift资源管理， 你可以直接用:UIFont(name: "你的iconfont名称", size: fontSize)
        let font = R.font.iconfont(size: fontSize)
        let attributes = [NSAttributedString.Key.font: font, NSAttributedString.Key.foregroundColor: fontColor]
        let attributedString = NSAttributedString(string: iconText, attributes: attributes as [NSAttributedString.Key : Any])

        UIGraphicsBeginImageContextWithOptions(CGSize(width: fontSize, height: fontSize), false, 0)
        attributedString.draw(at: CGPoint(x: 0, y: 0))
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        // 如果不想用UIIimageView , 这里直接返回image即可。 return image
        
        let imageV = UIImageView(image: image)
        imageV.isUserInteractionEnabled = true
        let tap = ClosureTapGestureRecognizer()
        imageV.addGestureRecognizer(tap)
        tap.addAction { tap in
            guard let action = action else {
                return
            }
            action()
        }
        return imageV
    }

3.自定义一个点击事件封装

/// 自定义tapgesture 闭包方式回调
class ClosureTapGestureRecognizer: UITapGestureRecognizer {
    private var action: ((UITapGestureRecognizer) -> Void)?

    func addAction(_ action: @escaping ((UITapGestureRecognizer) -> Void)) {
        self.action = action
    }

    @objc func handleAction(sender: UITapGestureRecognizer) {
        guard let action = action else { return }

        action(sender)
    }

   
    override init(target: Any?, action: Selector?) {
        super.init(target: target, action: action)

        self.addTarget(self, action: #selector(handleAction(sender:)))
    }
}

4.使用方法

        // 返回label
        let iconLabel = ExIconFont.iconFontLabel(fontSize: 24, fontName: IconFontName.avater.rawValue) {
           self.navigationController?.pushViewController(PersonViewController(), animated: true)
        }
        // 返回UIImageView
        let iconFontImageV = ExIconFont.iconfontToImage(iconText: IconFontName.avater.rawValue, fontSize: 24, fontColor: .black) {
        // 点击事件
           self.navigationController?.pushViewController(PersonViewController(), animated: true)
        }

        // 直接赋值
        navigationItem.leftBarButtonItem = UIBarButtonItem(customView: iconFontImageV)

完活~