Swift学习笔记
let 定义常量
var定义变量
countElements()字符串长度
isEmpty 判断是否空字符串
append()／ += 数组追加元素
insert()数组插入元素
removeAtIndex() 数组删除元素
count数组长度
元组的定义：
let status = {success:200, fail:500, description:"显示信息"}
数组的遍历：
var peopleList: String[] = ["小明","小李"]
for item in peopleList {
println(item)
}
for (index,value) in enumerate(peopleList){
println("id: \(index + 1) name: \(value)")
}
字典的定义：
var airports : Dictionary<String,String> = ["CCA":"China Air","KSE":"Korean Air"]
removeValueForKey()字典删除元素
字典的遍历：
for (airportCode,airportName) in airports {
}
for airportCode in airports.keys {
}
for airportName in airports.values {
}
获得字典的键或值的集合
let airportCodes = Array(airports.keys)
let airportNames = Array(airports.values)
switch 语句 不需要break 最后都不符合条件可执行default
switch findd{
case "a","b","c": //字符串情况可以多项
println("not find")
fallthrough //加上这句可以贯穿下去 同时也走下个分支
case "d":
println("ok")
case 0…3: //数字情况可以判断中间值
default:
}
函数的定义
func find(id:String,name:String) -> String{
return "ok"
}
func find(id:String,name:String) -> (selectId: int,selectName:String){ //也可使用元组返回值
return (1,"小明")
}
fund find(type:Bool) -> (Int) -> Int { //传入int型 返回也是int型
}
let player = find();
println("\(player.selectId) , \(player.selectName)")