[摘要]本文是對swift-字典的講解，對學習IOS蘋果軟件開發有所幫助,與大家分享。

swift字典

在swift中，key：key值一定是可hash的，一定是獨一無二的，swift的基本數據類型（String,Int,Float）都是可哈希的，所以都可以作為key值。 value：沒有要求

直接上代碼了,注釋給大家標的很明白

//創建字典並賦值
let dict = ["name":"xiaoyu","age":12]
let dict2:[String:Any] = ["name":"xiaoyu","age":12];
let dict3:Dictionary<String,Any> = ["name":"xiaoyu","age":13,"height":130]

print(dict3)

//創建空字典

let dict4:[String:Any] = [:]
let dict5:[String:Any] = Dictionary()

//創建可變字典
var dict6:[String:Any] = ["name":"xiaoyu"]

//更新字典的數據 value輸出的是原來的key對應的value值
if let Value = dict6.updateValue("dayu", forKey: "name")
{
    print(Value)
    print(dict6)
}

//刪除字典元素
dict6.removeValueForKey("name")
//刪除全部元素
dict6.removeAll()
dict6.removeAll(keepCapacity: true)
//遍歷字典
for (key,value) in dict6
{
    print("key:\(key) value:\(value)")
}

for key in dict6.keys{
    print("key:\(key)")
}

//合並字典

var dict7:[String:Any] = ["name":"小雨","age":133]

var newDict8:[String:Any] = ["weight":"小於","height":13]
for (key,value) in newDict8{
    dict7.updateValue(value, forKey: key)
}

print("dict7:\(dict7)");