下面通过一个样例演示如何对数组元素进行排序。数组内为自定义用户对象，最终要实现按用户名排序，数据如下：
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var userList = [UserInfo]()userList.append(UserInfo(name: "张三", phone: "4234"))userList.append(UserInfo(name: "李四", phone: "1212"))userList.append(UserInfo(name: "航歌", phone: "3525")) |
方法1
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userList.sortInPlace(onSort)func onSort(s1:UserInfo, s2:UserInfo) -> Bool{ return s1.name > s2.name} |
方法2
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userList.sortInPlace({$0.name > $1.name}) |