讨论如何使用委派以非同步方式呼叫一般方法，并提供简单的程序码范例，示范四种等待非同步呼叫传回的方式。

Discusses the use of delegates to make asynchronous calls to ordinary methods, and provides simple code examples that show the four ways to wait for an asynchronous call to return.

youdao

讨论如何使用委派以非同步方式呼叫一般方法，并提供简单的程序码范例，示范四种等待非同步呼叫传回的方式。

Discusses the use of delegates to make asynchronous calls to ordinary methods, and provides simple code examples that show the four ways to wait for an asynchronous call to return.

youdao