iOS swift pods 私有库 资源xib，png 加载

.podspec 文件更改 例子

s.resource_bundles = {
     'SHMusicPlayer' => ['SHMusicPlayer/Assets/*']
   }

/// 加载xib
public protocol SHNibLoad:UIView,SHResrouceLoad {
    static func sh_loadViewFromXib() -> Self?;
}

/// 资源加载类
public protocol SHResrouceLoad:class {
    /// 加载图片
    /// - Parameter imgName: 图片名称
    func sh_loadImg(_ imgName:String) -> UIImage?;
    
}
extension SHNibLoad{
    public static func sh_loadViewFromXib() -> Self?{
        
        let curr = Bundle.sh_bundleFor(aClass: Self.self)
        
        return curr?.loadNibNamed("\(Self.self)", owner: nil, options: nil)?.first as? Self
    }
}
extension SHResrouceLoad{
    
    public func sh_loadImg(_ imgName:String) -> UIImage?{
        
        
        return UIImage.sh_imgName(imgName, aClass: Self.self)
    }
}

extension UIImage{
    public static func sh_imgName(_ imgName:String,aClass:AnyClass) -> Self? {
        
        let currB = Bundle.sh_bundleFor(aClass: aClass)
        if let imgP = currB?.path(forResource: imgName, ofType: nil) {
           return Self.init(contentsOfFile: imgP)
        }
        
        return nil
    }
}


extension Bundle{
    
    public static func sh_bundleFor(aClass:AnyClass) -> Self? {
        let curBundle = Bundle.init(for: aClass)
        if let curBundleName = curBundle.infoDictionary?["CFBundleName"] {
            let curBundleDirectory = "\(curBundleName).bundle";
            
            let bgdPath = curBundle .path(forResource: curBundleDirectory, ofType: nil)
           
            let curr = Self.init(path: bgdPath!)

            return curr
            
       }
        
        return nil
    }
}