swift - 使用协议实现view的nib加载

• 创建一个 Swift File 文件实现 NibLoadable 协议

import UIKit

protocol NibLoadable {

}

extension NibLoadable where Self : UIView {
    static func loadFromNib(_ nibname : String? = nil) -> Self {
        let loadName = nibname == nil ? "\(self)" : nibname!
        return Bundle.main.loadNibNamed(loadName, owner: nil, options: nil)?.first as! Self
    }
}

• 需要使用该协议的view需遵守该协议

import UIKit

class DemoView: UIView, NibLoadable {
    var name : String = ""
}

• 从nib初始化方法

let demoView = DemoView.loadFromNib()
或
let demoView = DemoView.loadFromNib("DemoView")