如何仅覆盖 UIControlEvent.allEditingEvents 的 UITextField 中的 addTarget?
How can I override addTarget in a UITextField for only UIControlEvent.allEditingEvents?
如何覆盖 UITextField
class 中的 addTarget
函数,但仅限于 UIControlEvent.allEditingEvents
?
功能是这样的,但是我不确定如何只对特定的控制事件应用它。
override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
<#code#>
}
您应该调用 super.addTarget
,并且仅当 controlEvents
等于 .allEditingEvents
时才调用您的自定义代码。
override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
super.addTarget(target, action: action, for: controlEvents)
if controlEvents == .allEditingEvents {
[your code]
}
}
如何覆盖 UITextField
class 中的 addTarget
函数,但仅限于 UIControlEvent.allEditingEvents
?
功能是这样的,但是我不确定如何只对特定的控制事件应用它。
override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
<#code#>
}
您应该调用 super.addTarget
,并且仅当 controlEvents
等于 .allEditingEvents
时才调用您的自定义代码。
override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControlEvents) {
super.addTarget(target, action: action, for: controlEvents)
if controlEvents == .allEditingEvents {
[your code]
}
}