语法：
- { (parameters) ->return type in statements}
实例：采用函数实现：
- let names =["Chris", "Alex", "Ewa", "Barry", "Daniella"]
- funcbackwards(s1: String, s2: String) -> Bool {
- return s1 > s2
- }
- var reversed = sort(names, backwards)
- println(reversed)
- //sort 排序函数，backwards 通过排序规则的函数 采用闭包实现：
- var reversed = sort(names, { (s1: String, s2: String) -> Bool in
- return s1 > s2
- })
- println(reversed)
Swift交流讨论论坛论坛：http://www.cocoagame.net
欢迎加入Swift技术交流群：362298485