swift ，用对象对 nsmutableArray 进行排序

Question

我有带有对象的 nsmutablearray

user_id , username , user_Last_Update_Info

我想按 user_Last_Update_Info

对这个数组进行排序

怎么做？？

Answer 1

这应该有帮助：

    // Example for Swift Array
    myArray.sortInPlace {
        obj1 , obj2 in
        dic1.user_Last_Update_Info < dic2.user_Last_Update_Info
    }

// Example for Swift NSMutableArray
// newArr is an optional [AnyObject], you should cast it to what you expect
let newArr = myArray.sortedArrayUsingDescriptors([NSSortDescriptor(key: "user_Last_Update_Info", ascending: true)])

Answer 2

试试这个：

arrayToSort.sortUsingComparator{
    (obj1:AnyObject!, obj2:AnyObject!) -> NSComparisonResult in
    var dateStr1 = obj1["user_Last_Update_Info"] as NSString
    var date1: NSDate = dateFormatter.dateFromString(dateStr1)!
    var dateStr2 = obj2["user_Last_Update_Info"] as NSString
    var date2: NSDate = dateFormatter.dateFromString(dateStr2)!
    return date2.compare(date1)
}