ios Swift - 如何在带参数的方法上调用 Selector()？
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Swift - How to call Selector() on method with arguments?
提问by Kosmetika
I'm learning Swift and need to call my method on tap, here is the code:
我正在学习 Swift，需要随时调用我的方法，这是代码：
var gestureRecognizer = UITapGestureRecognizer()
myView.addGestureRecognizer(gestureRecognizer)
gestureRecognizer.addTarget(self, action: Selector(dismiss(nil)))
This returns error - Could not find an overload for init that accepts the supplied arguments
这将返回错误 - Could not find an overload for init that accepts the supplied arguments
I also tried like Selector("dismiss:nil")and Selector("dismiss(nil)")with no luck..
我也试过喜欢Selector("dismiss:nil")和Selector("dismiss(nil)")没有运气好的话..
Here the method I'm calling:
这是我正在调用的方法：
func dismiss(completion: (() -> Void)!) {
self.dismissViewControllerAnimated(true, completion: completion)
}
回答by dasdom
Just use the name of the method as a string:
只需使用方法的名称作为字符串：
gestureRecognizer.addTarget(self, action: "dismiss:")
Edit: In Swift 3.0 you will have to use the following syntax:
编辑：在 Swift 3.0 中，您必须使用以下语法：
gestureRecognizer.addTarget(self, action: #selector(dismiss(_:)))
回答by Mick MacCallum
You don't pass arguments in selectors. You only represent that there is one with a colon. Additionally, you don't have to use the Selector type at all. If you pass in a String literal, it is converted to a Selector for you.
您不在选择器中传递参数。你只表示有一个带冒号的。此外，您根本不必使用 Selector 类型。如果您传入一个字符串文字，它会为您转换为一个 Selector。
gestureRecognizer.addTarget(self, action:"dismiss:")
