问题描述
在Apple文档中， UISwitch 的函数 setOn(on:Bool，动画:Bool)不发送操作.在iOS 10之前，它可以正常工作，但是在iOS 10中调用它后，它将发送操作.在"ValueChanged"事件中调用它以强制切换回去，因此我两次获得了该事件的操作.是iOS 10中的错误吗?
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?
推荐答案
DispatchQueue.main.async {
sender.setOn(flag, animated: animated)
}
它在Xcode 8中对我有效.
it works for me in Xcode 8.
但直接在主线程上调用 UISwitch.setOn(_:animated:)无效.
but call UISwitch.setOn(_:animated:) directly on main thread doesn't work.
感谢@codiction:
thanks to @codiction:
UISwitch.setOn(_:animated:)可以在主线程上调用直接，但不能在iOS 10上的UISwitch ValueChanged操作中直接调用.
UISwitch.setOn(_:animated:) can be called direclty on main thread, but can't be called directly in UISwitch ValueChanged action on iOS 10.
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