如何在UITextField中仅为UIControlEvent.allEditingEvents覆盖addTarget？

Question

如何覆盖addTarget课程中的UITextField功能，但仅适用于UIControlEvent.allEditingEvents？

函数是这样的，但是我不知道如何仅将它应用于特定的控件事件。

override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
    <#code#>
}

Answer 1

如果super.addTarget等于controlEvents，您应致电.allEditingEvents并仅调用自定义代码。

override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
    super.addTarget(target, action: action, for: controlEvents)

    if controlEvents == .allEditingEvents {
        [your code]
    }
}