var a: Int = 1
var b: Int = 2
var sum: Int{
get{
return a + b
}
set{
b = newValue - a
}
}
print(sum) ******* 3
sum = 10 ******* 走 set newValue = 10
print(sum) ******* 10
var a: Int = 1
var b: Int = 2
var sum: Int{
get{
return a + b
}
set{
b = newValue - a
}
}
print(sum) ******* 3
sum = 10 ******* 走 set newValue = 10
print(sum) ******* 10
本文标题:swift set 和 get
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