UISwitch setOn(:, animated:) does not work as document

Question

As Apple's document write, UISwitch's function setOn(on: Bool, animated: Bool) does not send action. It works fine before iOS 10, but it will send action after I call it in iOS 10. I call it in "ValueChanged" event to force switch back, so I got this event action twice. is it a bug in iOS 10?

I add a delay to call `setOn(on: Bool, animated: Bool)`， action does not be called again。 So it can't call this method in action directly in iOS 10？ — codiction, Sep 20 '16 at 07:02
@lee not yet, I add a delay, but it's not a perfect solution cause switch button flash the state. — codiction, Oct 14 '16 at 06:48
@edison 's answer is right. let check with get main thread on iOS 10 — lee, Oct 14 '16 at 08:38

edison · Answer 1 · 2016-10-27T08:47:33.810

11

DispatchQueue.main.async {
    sender.setOn(flag, animated: animated)
}

it works for me in Xcode 8.

but call UISwitch.setOn(_:animated:) directly on main thread doesn't work.

Update

thanks to @codiction:

UISwitch.setOn(_:animated:) can be called direclty on main thread, but can't be called directly in UISwitch ValueChanged action on iOS 10.

edited Oct 27 '16 at 08:47

answered Sep 27 '16 at 13:02

edison

171
5

1

`UISwitch.setOn(_:animated:)` can be called direclty on main thread but can't be called directly in `UISwitch` ValueChanged action – codiction Sep 29 '16 at 01:46
It work as strange thing on iOS 10.Because, default `setOn` call on main thread on iOS 9, but not on iOS 10. – lee Oct 12 '16 at 08:35

score 8 · Answer 2 · answered Oct 18 '16 at 14:50

8

The following solution resolves that issue. You should dispatch_async only if trying to call [UISwitch setOn:] within the action callback of that switch itself.

dispatch_async(dispatch_get_main_queue(), ^{

    [switch setOn:YES animated:YES];
});

answered Oct 18 '16 at 14:50

yankat

81
3

score 3 · Answer 3 · answered Feb 22 '19 at 17:22

I found these solutions to partially work. However, when I used switch.setOn(false, animated: true) the onTint color would appear white in the off position. I'm assuming this is a bug but I worked around this by using this:

switch.setOn(false, animated: true)
switch.onTintColor = .clear

Don't forget to reset the onTint color when you're ready to allow the switch to be toggled on, if applicable.

switch.onTintColor = <your custom color> // Use nil to use the default onTint for UISwitch

Hopefully this helps save someone a little time.

Same for "thumbTintColor" – ergunkocak Aug 28 '20 at 18:20 — ergunkocak, Aug 28 '20 at 18:20

UISwitch setOn(:, animated:) does not work as document

3 Answers3

Update

Linked