如何按升序顺序对数组进行排序2.3

Question

[{
msg = "Hi This is Jecky";
name = Susheel;
sender = 77;
timestamp = 1464241769520;
username = susheel;
}, {
msg = Dubai;
name = Jecky;
sender = 78;
timestamp = 1464246547147;
username = Jecky;
}, {
msg = "How are you ?";
name = Susheel;
sender = 77;
timestamp = 1464243480381;
username = susheel;
}, {
msg = "Aje dekhai nai";
name = Jecky;
sender = 78;
timestamp = 1464244974198;
username = Jecky;
}]

• 我有这样的数组。 我想在swift 2.3或最新版本的swift中使用时间戳对这个数组进行排序。 任何人都可以帮助我吗？

Answer 1

let array=[
        [
            "msg":"Hi This is Jecky",
            "name":"Susheel",
            "sender":77,
            "timestamp":1464241769520,
            "username":"susheel",
        ],
        [
            "msg":"Dubai",
            "name":"Jecky",
            "sender":78,
            "timestamp":1464246547147,
            "username":"Jecky",
        ],
        [
            "msg":"How are you ?",
            "name":"Susheel",
            "sender":77,
            "timestamp":1464243480381,
            "username":"susheel",
        ],
        [
            "msg":"Aje dekhai nai",
            "name":"Jecky",
            "sender":78,
            "timestamp":1464244974198,
            "username":"Jecky",
        ],
    ]
    print("array = \(array)")
    let sortedArray=array.sort { (obj1, obj2) -> Bool in
        return (obj1["timestamp"] as! Double) < (obj2["timestamp"] as! Double)
    }
    print("sortedArray = \(sortedArray)")

Answer 2

如果你的数组是可变的，你可以使用sortInPlace

yourArray.sortInPlace{$0.timestamp < $1.timestamp}

如果没有，你可以从排序中创建一个新的数组，就像Kristijan所建议的那样（尽管在尾随闭包时不需要括号）：

let newArray = yourArray.sort{$0.timestamp < $1.timestamp}

Answer 3

customArray.sortInPlace { 
  (element1, element2) -> Bool in
   return element1.someSortableField < element2.someSortableField
}

看看这个https://www.hackingwithswift.com/example-code/arrays/how-to-sort-an-array-using-sort

Answer 4

按属性“timestamp”排序

array.sorted{$1["timestamp"] as? Long > $0["timestamp"] as? Long}

Answer 5

您可以使用扩展程序获得此功能：

extension NSArray{
 //sorting- ascending
  func ascendingArrayWithKeyValue(key:String) -> NSArray{
    let ns = NSSortDescriptor.init(key: key, ascending: true)
    let aa = NSArray(object: ns)
    let arrResult = self.sortedArray(using: aa as! [NSSortDescriptor])
    return arrResult as NSArray
  }

  //sorting - descending
  func discendingArrayWithKeyValue(key:String) -> NSArray{
    let ns = NSSortDescriptor.init(key: key, ascending: false)
    let aa = NSArray(object: ns)
    let arrResult = self.sortedArray(using: aa as! [NSSortDescriptor])
    return arrResult as NSArray
  }
}

使用这样：

 let array=[
      [
        "msg":"Hi This is Jecky",
        "name":"Susheel",
        "sender":77,
        "timestamp":1464241769520,
        "username":"susheel",
        ],
      [
        "msg":"Dubai",
        "name":"Jecky",
        "sender":78,
        "timestamp":1464246547147,
        "username":"Jecky",
        ],
      [
        "msg":"How are you ?",
        "name":"Susheel",
        "sender":77,
        "timestamp":1464243480381,
        "username":"susheel",
        ],
      [
        "msg":"Aje dekhai nai",
        "name":"Jecky",
        "sender":78,
        "timestamp":1464244974198,
        "username":"Jecky",
        ],
      ]

    let a = NSArray.init(array: array)
    let filArray = a.ascendingArrayWithKeyValue(key: "timestamp")
    print(filArray)

Answer 6

=>首先，将您的Json转换为对象。 （点击此链接可以： - http://roadfiresoftware.com/2015/10/how-to-parse-json-with-swift-2/ ）

=>然后将Array声明为类型化数组，以便在迭代时调用方法：

var array : [yourObjectClassName] = []

=>然后你可以简单地按以下方式对值进行排序：

array.sort({ $0.name > $1.name })

上面的示例按名称对所有数组进行排序。 如果需要按timeStamp排序，可以将名称更改为timeStamp ..etc

检查此链接以获取更多排序示例： Swift如何按属性值对自定义对象数组进行排序