遍历字典

源代码：

//
//遍历字典.swift
//
//  Created by chenzhen on 16/8/2.
//  From 大连东软信息学院
//  Copyright © 2016年 zhen7216. All rights reserved.
//

import Foundation

var studentDictionary = [102 : "张三", 105 : "李四", 109 : "王五"]

print("---遍历键---")
for studentID in studentDictionary.keys {
    print("学号: \(studentID)")
}

print("---遍历值---")
for studentName in studentDictionary.values {
    print("学生:\(studentName)")
}

print("---遍历键: 值---")
for (studentID, studentName) in studentDictionary {
    print("\(studentID) : \(studentName)")
}

运行结果：