Swift之字典

这篇来说说字典的定义用法。
定义字典：

 let dd = [Int:String]()
 print(dd)//定义一个空字典，而且定义了它的key为int，value为string

也可以这么定义个空字典：

let d:[Int:String] = [:]
    print(d)
    
var emptyDict:[String:String] = [:]
    print(emptyDict)

定义一个有值的字典：

let dic1:[Int:String] = [1:"one",2:"two"]
    print(dic1)
    print(dic1[1] as Any)

 let dic2 = ["name":"007","age":"xiaoli"]
    print(dic2)
    print(dic2["name"] as Any)

let dict = ["name":"张","age":18] as [String : Any]
    print(dict);
    print(dict["age"] as Any)

定义一个字典数组：

let dic3:[[String:AnyObject]] = [
       ["name":"ooo" as AnyObject,"age":18 as AnyObject],
     ["name":"oop" as AnyObject,"age":18 as AnyObject]
        
    ]
    
    print(dic3)

总结

字典的定义就样子，有些我还是不明白，后面随着理解加深及时补充。