Swift3.0的学习基础语法：(字典)

1.字典的定义：

func demo(){

 let dic = ["name":"zhufeng","age":200]

print(dic)

/定义字典的数值 用的比较多 ，key 都是String类型的 一定要保证这一点了操作了

let dic2 :[[String:AnyObejct]]={

  ["name":"zhufeng","age":20],

 ["name":"zhfueng2","age":30]

}

}

2.字典的遍历:

func demo(){

print("字典的遍历方法---------")

letarray = ["name":"zhufeng","age":17]as[String:Any]

//使用for来循环遍历出来的东西

for e in array {

print("\(e.key):\(e.value)")

}

for(key ,value)inarray{

print("\(key):\(value)")

}

}

}

3.字典的增删改：

func demo(){

print("字典的增，删，改的东西------")

vardic = ["name":"zhufeng","age":18]as[String:Any];

print(dic)

//新增东西，如果key不存在,就是添加了

dic["title"] ="测试下"

print(dic)

//改变,如果是key存在就是修改

dic["name"] ="zhufeng2"

print(dic)

//删除通过key来删除

//科普通过key来定位，key，key必须是hash值

dic.removeValue(forKey:"age")

print(dic)

}

4.字典的合并：

func demo(){

vararray= ["name":"zhufeng","age":18]as[String:Any]

vararray2 = ["name":"zhufeng2","age":20,"title":"老王"]as[String:Any]

for(key ,value)inarray2{

array[key] = array2[key]

}

print(array) // ["name": "zhufeng2", "age": 20, "title": "老王"]

}