我开始学习swift是通过苹果公司提供的swift上的iBook-The swift Programming Language。这本书说要创建一个空字典，应该使用[:]，就像声明数组为[]一样:
我声明一个空数组，如下所示:
let emptyArr = [] // or String[]()
但是在声明空字典时，我得到语法错误:
let emptyDict = [:]
如何声明一个空字典?
当前回答
我通常用
var dictionary:[String:String] = [:]
dictionary.removeAll()
其他回答
迅速:
var myDictionary = Dictionary<String, AnyObject>()
斯威夫特4
let dicc = NSDictionary()
//MARK: - This is empty dictionary
let dic = ["":""]
//MARK:- This is variable dic means if you want to put variable
let dic2 = ["":"", "":"", "":""]
//MARK:- Variable example
let dic3 = ["name":"Shakeel Ahmed", "imageurl":"https://abc?abc.abc/etc", "address":"Rawalpindi Pakistan"]
//MARK: - This is 2nd Variable Example dictionary
let dic4 = ["name": variablename, "city": variablecity, "zip": variablezip]
//MARK:- Dictionary String with Any Object
var dic5a = [String: String]()
//MARK:- Put values in dic
var dic5a = ["key1": "value", "key2":"value2", "key3":"value3"]
var dic5b = [String:AnyObject]()
dic5b = ["name": fullname, "imageurl": imgurl, "language": imgurl] as [String : AnyObject]
or
//MARK:- Dictionary String with Any Object
let dic5 = ["name": fullname, "imageurl": imgurl, "language": imgurl] as [String : AnyObject]
//MARK:- More Easy Way
let dic6a = NSDictionary()
let dic6b = NSMutalbeDictionary()
我通常用
var dictionary:[String:String] = [:]
dictionary.removeAll()
你可以像这样简单地声明它:
var emptyDict:NSMutableDictionary = [:]
在Swift中声明和初始化字典
字符串字典
var stringDict: [String: String] = [String: String]()
OR
var stringDict: Dictionary<String, String> = Dictionary<String, String>()
Int字典
var stringDict: [String: Int] = [String: Int]()
OR
var stringDict: Dictionary<String, Int> = Dictionary<String, Int>()
AnyObject字典
var stringDict: [String: AnyObject] = [String: AnyObject]()
OR
var stringDict: Dictionary<String, AnyObject> = Dictionary<String, AnyObject>()
字符串数组字典
var stringDict: [String: [String]] = [String: [String]]()
OR
var stringDict: Dictionary<String, Array<String>> = Dictionary<String, Array<String>>()
字符串字典数组
var stringDict: [[String: String]] = [[String: String]]()
OR
var stringDict: Array<Dictionary<String, String>> = Array<Dictionary<String, String>>()
