iOS二次發育（swift）類

類的初探

class

person
func 
out() ->string 
func goeast() 
}let person = person(firstname: "
1", lastname: "2"
)person.
out()
person.firstname = "3"
;let person2 =person
person2.goeast()
person2.
out()
person === person2/*
引用同一塊位址
*/struct
location
}//值型別 方法改變自身，需宣告關鍵字mutating
//結構體
struct
location2}//
列舉enum
switch
}}var button =switch.off
button.click()

//

方法struct
point
struct
size
class
rectangle
//計算型屬性
varcenter:point
set    }
}let rectangle = rectangle(point: point(x:10, y:20), size: size(width: 20, height: 20
))rectangle.center
rectangle.center = point(x: 1, y: 1
)rectangle.point
cgrect(x: 
0, y: 0, width: 1, height: 1
)int.max
int.min
//類方法
struct
matrix 
let row =arr2d.count
let col = arr2d[0
].count
for i in
1..}
self.m =arr2d
self.row =row
self.col =col
}func printmatrix() 
print()}}
static func identitymatrix(n: int) -> matrix?
var arr2d: [[int]] =
for i in
0..return
matrix(arr2d)
}}if let m = matrix([[1, 2], [3,4
]]) 
if let m2 = matrix .identitymatrix(n: 4
) //
property observer 屬性觀察器
class
lightbulb 
didset }}
}let lightbulb =lightbulb()
lightbulb.current = 10
lightbulb.current = 40

類的繼承

//

類方法用static關鍵字，無法繼承，所以要用class關鍵字
class
math 
else
}}math.abs(number: -35
)class
submatn: math 
}

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