好久沒來了，趁著新語言swift發布，繼續鑽研中！
create class 建立類 （過載效果）
//create class 建立類
class
myclass
//method 成員方法
func doit()
func doit() ->int
func doit(a:int) ->int
func doit(a:int, b:int) ->int
func doit() ->string
func doit(a:string) ->string
func doit(a:string, b:string) ->string }//
create / using an instance 建立 / 使用 乙個例項
var a =myclass()
a.doit(
"wang
", b: "
zhipeng
")
enums 列舉
//enums 列舉
enum
comcsofttype: int
var mytype = comcsofttype.developmentengineer
declaring variables 變數的宣告 （可選變數）
//declaring variables 變數的宣告
var mutabledouble:double = 1.0
mutabledouble = 2.0
let constantdouble:double = 1.0
//constantdouble = 2.0 error 錯誤
var autodouble = 1.0
//optional value 可選變數 （新機制）
var optiondouble:double? //
optiondouble = 1.0
//這時候開始 optiondouble 才會開始分配記憶體
if let definedouble =optiondouble
else
control flow 控制流
//control flow 控制流
var condition = true
ifcondition
else
var val = "
four
"switch
val
//omits upper value, use ... to include 省略了上限值，使用 ... 包括
for i in
0..3
for var j = 0; j < 3; ++j
//while
var n = 2
while n < 100
println(n)
var m = 2do
while m < 100
println(m)
string quick examples 字串的例子
//string quick examples 字串的例子
var firstname = "
zhipeng
"var lastname = "
wang
"var hellostring = "
hello, \(lastname) \(firstname)
"var tipstring = "
2499
"var tipint =tipstring.toint()
extension double
}tipstring = "
24.99
"var tipdouble = double(string:tipstring)
array quick examples 陣列的例子
//array quick examples 陣列的例子
var person1 = "
one"
var person2 = "
two"
var array:string =[person1, person2]
array += "
three
"for person in
array
var persontwo = array[1
]println(
"persontwo: \(persontwo)
")
dictionary quick examples 字典的例子 （泛型效果）
//dictionary quick examples 字典的例子
var dic:dictionary= ["
one": "1"
,
"two
": "2"
,
"three
": "3"
]dic[
"three
"] = "4"
//update three
dic["
one"] = nil //
delete one
for(key, value) in
dic
function 函式
//function 函式
func getpirces() ->(double, double, double)
//取出元組
var (one, two, three) =getpirces()
println(
"one = \(one), two = \(two), three = \(three)")
func getsum(numbers:int...) ->int
return
sum}
getsum()
getsum(
1, 3, 5, 7, 9)
函式巢狀
//函式巢狀
func nestedfunction() ->int
//add()
return
x}
函式傳遞
//函式傳遞
func makeincrementer() -> (int ->int)
return
addone
}var increment =makeincrementer()
increment(1)
func makeincrementer2() -> ((string, string) ->string)
return
and}
var increment2 =makeincrementer2()
increment2(
"wang
", "
zhieng")
func lessthanone(number:int) ->bool
func makeincrementer3(list:int, condition:int -> bool) ->bool
}return
false
}makeincrementer3([
1,2,3,4,5], lessthanone)
extends 繼承 (多型效果)
//extends 繼承 (多型效果)
println("
********************=== extends 繼承")
class
people
//sleep 睡
func sleep()
//work 工作
func work()
//said 說
func said()
}class
chinese:people
}class
americans:people
}class
alien }//
不支援多繼承
//class futuregenerations:chinese, americans //}
//多型 必要條件:1.繼承 2.重寫 3.父類引用指向子類物件
var people =people()
people.said()
people =chinese()
people.said()
people =americans()
people.said()
//people = alien() error 'alien' is not convertible to 'people'
var chinese =chinese()
chinese.said()
var americans =americans()
americans.said()
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