还是在swift入门，最近找了一个类似android Toast的控件UIView+Toast

UIView+Toast.h Toast Copyright (c) 2014 Charles Scalesse.
Permission is hereby granted,free of charge,to any person obtaining
a copy of this software and associated documentation files (the
“Software”),to deal in the Software without restriction,including
without limitation the rights to use,copy,modify,merge,publish,
distribute,sublicense,and/or sell copies of the Software,and to
permit persons to whom the Software is furnished to do so,subject to
the following conditions: The above copyright notice and this
permission notice shall be included in all copies or substantial
portions of the Software.

然后我用Object-c里面可以使用

－ (void)makeText:(UIView *) view Msg :(NSString *)toast{
    [view makeToast:toast];
}

但是在swift中，却找不到makeText的方法，然后我把OC的方法设置为静态方法，在Swift中再加一次extension

extension UIView{
    //在OC中定义的扩展在swifty中找不到？
    func showToast(Msg :String){
        OCconnector.makeText(self,msg: Msg)
    }
}

然后swift中就找到这个方法了，可能这样做有问题，迟点再研究一下