Hi,
The following code works fine. The property `a` is stored twice. But
it don't enter infinite loop.
class Foo {
var a: Int = 0 {
didSet {
a = a + 1
}
}
}
let foo = Foo()
foo.a = 2
print(foo.a) // output 3
Regard
It seems like a bug. You should file it.
Zhaoxin
On Sun, Sep 4, 2016 at 11:11 PM, wrote:
> Thanks for reply.
>
> How does Swift choose *rules* as you said?
>
> Swfit encourage to override the property observer. But when we change the
> own property in Child class's `didSet` observer, that would
> On Sep 4, 2016, at 8:11 AM, adelzhang via swift-users
> wrote:
>
> Swfit encourage to override the property observer. But when we change the own
> property in Child class's `didSet` observer, that would cause infinite loop:
I’m not a Swift guru, but that seems like a bug to me. The book exp
Hi,
didSet is called as soon as the property is stored… Excepted when the value is
stored in the initialiser code.
For me it is completely predictable that your code enter an infinite loop
Regards
> On 4 Sep 2016, at 17:11, adelzhang via swift-users
> wrote:
>
> Thanks for reply.
>
> How
Thanks for reply.
How does Swift choose *rules* as you said?
Swfit encourage to override the property observer. But when we change the
own property in Child class's `didSet` observer, that would cause infinite
loop:
class Base {
var a: Int = 0
}
class Child : Base {
>
> 1) when `didSet` observer will call?
For me, it is more like Swift developer tries to override some beginner's
> flaw.
Above is incorrect. You can change property's value in `didSet`, that won't
cause didSet called again as it is intended to give you the opportunity to
do that.
2) infini
>
> 1) when `didSet` observer will call?
For me, it is more like Swift developer tries to override some beginner's
flaw.
2) infinite loop
If you intended to do things bad, things went bad.
3) override property observer
You mentioned "TSPL(The Swift Programming Language) ", and it says
Hi all
It sounds convenient to monitor change in property's value using property
observer.
But TSPL(The Swift Programming Language) talk little about property
observer. There
are some questions abouts property observer.
1) when `didSet` observer will call?
I assume it's fine that changing
