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如何对包含可选NSdate的可选项进行排序?对可选项目的数组进行排序,该项目还包含另一个可选项
class HistoryItem {
var dateCompleted: NSDate?
}
let firstListObject = someListOfObject.last
let secondListObject = someOtherListOfObject.last
let thirdListObject = evenSomeOtherListOfObject.last //Last returns 'T?'
var array = [firstListObject , secondListObject, thirdListObject]
如何根据dateCompleted对数组进行排序?
这将做到这一点。谢谢! – Konrad77 2014-10-04 09:54:15