1.循环
var singers = ["李","张",27)">丁",27)">克"]
for singerinsingers{}
for iin0..<singers.count{}
while(条件语句){}
do{}while(条件)
2.Switch case 专题
switchstudents{
case ("北大",2007):print("天之骄子")
case ("重邮",2006...2010):print("就业率最高")
case ("北大",2005..<2009):print("拔尖")
default:print("")
}
ottom:0px; font-size:14px; font-family:Menlo; color:rgb(79,_):print("天之骄子")
ottom:0px; font-size:14px; font-family:Menlo; color:rgb(209,_):print("就业率最高")
default:print("")
}
3.值绑定和条件绑定
var position = (55,45)
switch position{
case let(x,55):
println("[\(x),55]")
caselet(x,y)where x == y:
println("[\(x),\(y)]")
caselet(x,y)where x <45 && y >35:
println("[\(x),\(y)]")
default: println("")
}
4.打破流程控制
outFor:for ain1...5{
for iin1...10{
if i ==2{
break outFor
}
print("\(i)")
}
}
note：switch case 中可以使用fall through贯穿
5.给数组添加序号
for (index,user) in enumerate(userList){
}
5.示例代码
forvar i =0 ; i <100 ; i++ {
}
forvar index =0; index <10; ++index{
}
var i =1;
var j =2;
let base =3
let power =10
var answer =1
for_in1...power{
answer = answer * base
}
println("\(answer)")
let finalSquare =25
var board = [Int](count:finalSquare +1,repeatedValue:0)
//var board = Array(count: finalSquare,repeatedValue: 0)
board[03] = +08;board[06] = +11;board[09] = +09;board[10] = +02
board[14] = -10;board[19] = -11;board[22] = -02;board[24] = -08
var square =0
var diceRoll =0
/*
while square < finalSquare{
// 掷骰子
if ++diceRoll == 7{
diceRoll = 1
}
square += diceRoll
if square < board.count{
square += board[square]
}
*/
gameLoop:whilesquare !=finalSquare{
if ++diceRoll ==7{
diceRoll =1
}
switchsquare +diceRoll{
casefinalSquare:
break gameLoop
caselet numberwhere number >finalSquare:
continue gameLoop
default:
square += diceRoll
square += board[square]
}
}
println("game over")
let someCharactor:Character ="u"
switch someCharactor{
case "a","e","i","o","u":
println("someCharactor is yuanyin")
case "b","c":
println("someCharactor is fuyin")
default:
println("someCharactor is not a charactor")
}
let somePoint = (1,1)
switch somePoint{
case (0,0):
println("Origin")
case (0,_):
println("y轴")
case (_,0):
println("x轴")
case (-2...2,-2...2):
println("正方形内")
default:
正方形外")
}
switch somePoint{
caselet (x,y)where x == y:
println("x=y")
caselet (x,y)where x == -y:
println("x=-y")
caselet (x,y):
println("other")
}
原文地址：https://www.jb51.cc/swift/327162.html
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