如何覆盖addTarget
类中的UITextField
函数,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#>
}
如果super.addTarget
等于controlEvents
,你应该调用.allEditingEvents
并只调用你的自定义代码。
override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
super.addTarget(target, action: action, for: controlEvents)
if controlEvents == .allEditingEvents {
[your code]
}
}