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[英]Sorting dictionary keys based on a value of the tuple associated with the key in swift
[英]Array Sorting based on dictionary key:value in swift
野兔是一个数组,我想基于数组字典键值按升序或降序排序。
//Array Model
[
{
arrival_time:"12:85"
depart_time:"35:55"
price:"55.30"
},
{
arrival_time:"09:15"
depart_time:"18:20"
price:"10.50"
},
{
arrival_time:"15:30"
depart_time:"19:15"
price:"101.50"
}
]
//Here is my swift class and method
class SortClass: NSObject {
@objc func sortBusses (array:[Bus], sortKey:String) -> [Bus] {
//Sort array here...
return array
}
}
注意:我使用的是Xcode 8.0,Objective-C桥接Swift
我是新来的迅速。 请指导我
如果您的Bus
类的类型为NSObject
则可以使用sort函数和valueForKey
检索sortKey
的值。
@objc func sortBusses (array:[Bus], sortKey:String) -> [Bus] {
let sortValue: (Bus) -> String? = {
$0.value(forKey: sortKey) as? String
}
return array.sorted {
sortValue($0.0)! < sortValue($0.1)!
}
}
我通过使用排序描述符尝试了您的数组
我的代码:
let arrayInput:NSArray = [["arrival_time":"12:85","depart_time":"35:55","price":"55.30"],
["arrival_time":"09:15","depart_time":"18:20","price":"10.50"],
["arrival_time":"15:30","depart_time":"19:15","price":"101.50"]];
//descending order
var descriptor: SortDescriptor = SortDescriptor(key: "arrival_time", ascending: false)
var sortedResults: NSArray = arrayInput.sortedArray(using: [descriptor])
print("sortedResults \(sortedResults)");
希望能帮助到你
快乐的编码...
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