swift UIView 加载XIB

在项目中创建swift文件，直接复制下面代码粘贴即可。

///  有此协议并UIView遵守协议后。创建同名xib并绑定view为当前view。则可直接通过 loadFromNib 创建view。
///  若需要添加 loadFromNib 的参数可自行添加当前view遵守NibLoadable时的 loadFromNib 方法
///如：
/**
extension NibLoadable where Self : YourCustomView {
    //在协议里面不允许定义class 只能定义static
    static func loadFromNib(_ nibname: String? = nil ,dat data:Array<Dictionary<String, Any>>? = nil) -> Self {
        let view = UIView.loadFromNib("\(self)") as! Self
        view.datas = data
        return view
    }
}
 // 直接给自己的view添加初始化方法更好，因为class中可以直接使用supper，而不必传“/(self)"来初始化
 extension YourCustomView{
     class func loadFromNib(_ nibname: String? = nil ,dat data:Array<Dictionary<String, Any>>? = nil) -> Self {
         let view = super.loadFromNib() as! Self
         view.datas = data
         return view
     }
 }
 
*/
protocol NibLoadable {
}
extension NibLoadable where Self : UIView {
    //在协议里面不允许定义class 只能定义static
    static func loadFromNib(_ nibname: String? = nil ) -> Self {
        //Self (大写) 当前类对象 //self(小写) 当前对象
        let loadName = nibname == nil ? "\(self)" : nibname!
//        Bundle.main.loadNibNamed("PrepareView", owner: self, options: nil)
        let view = Bundle.main.loadNibNamed(loadName, owner: nil, options: nil)?.first as! Self
        view.frame = CGRect(x: 0, y: 0, width: screenWidth, height: screenHeight)
        return view
    }
    static func viewFromNib(_ nibname: String? = nil ) -> Self {
        return loadFromNib(nibname)
    }
}
extension UIView :NibLoadable{}

使用

 override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
//        let v = YourCustomView.loadFromNib()  // 所有UIview 都有这个加载方法
        let v = YourCustomView.loadFromNib(dat:[["1":"2"]]) //  自行为自己的view添加初始化时的入参 dat
        self.view.addSubview(v)
}