1 import Foundation 2  3 //字典的声明 4 var dic1: Dictionary 
     
       5 var scores: [String:Int] 6 //然后是创建字典 7 dic1 = Dictionary
      
       () 8 scores = Dictionary
       
        (minimumCapacity: 5) 9 10 var emptyDic: [String : Double] = [:]//空字典11 println(emptyDic.isEmpty)12 13 //通过常量和变量决定字典是否可变14 var person = [  "age":18,15                 "name":"heyang",16                 "身高":178]17 println(person["age"]!)18 println(person["weight"])//不存在的key，返回为nil19 person["name"] = "HeYang"20 println(person["name"]!)21 22 person["weight"] = 9023 println("字典是无序的：\(person)")//对不存在的key设置value，字典将会添加key－value对24 25 //var height: Int? = person["身高"]会报错,原因是person的元素都是NSObject所以上面的字典person是不严谨的26 var person_1 = ["age":"18",27                 "name":"heyang",28                 "身高":"178"]29 var height_1: String? = person_1["身高"]30 if height_1 != nil {31     println(height_1!)32 }33 //updateValue(value: Value, forKey: Key)34 if let oldName = person_1.updateValue("180", forKey: "身高"){35     println("原来的值是：\(oldName)")36 }37 println("现在的值是："+person_1["身高"]!)38 39 print("遍历：")40 for (key,value) in person_1{41     print("\(key) : \(value)    ")42 }43 44 println()45 //字典删除的方法46 person.removeAll(keepCapacity: false)47 person_1.removeValueForKey("身高")48 println("删除之后person：\(person) 和 person_1:\(person_1)")49 50 //取出字典当中的键值对51 let keysArr = [String](person_1.keys)52 let valuesArr = [String](person_1.values)53 println("keysArr: \(keysArr)")54 println("valuesArr: \(valuesArr)")