我正在为UITextfield子类化,以便在右侧创建一个覆盖按钮,该按钮将切换isSecureTextEntry布尔值。通常,在情节提要中创建IBAction时,布尔值是根据我将在Objective-C代码中实现的发件人确定的,如下所示:
-(IBAction)showPasswordTapped:(UIButton *)sender{
sender.selected = !sender.selected;
self.passwordField.secureTextEntry = !sender.selected;
}
但是,现在我正在子类化中,我正在考虑使用if else语句,但是逻辑看起来好像只是将布尔值设置为true一样。如果我无权访问发件人,合适的条件语句是什么?
这是我在Swift中的子类:
class SecurePasswordUITextField : UITextField {
override func awakeFromNib() {
super.awakeFromNib()
self.isSecureTextEntry = true
var overlayButton = UIButton.init(type: UIButtonType.custom)
overlayButton.titleLabel = "Show"
overlayButton.addTarget(self, action: #selector(showSecureCharacters), for: .touchUpInside)
overlayButton = CGRect.init(x: self.bounds.origin.x, y: self.bounds.origin.y, width: 28, height: 28)
self.rightView = overlayButton
self.rightViewMode = UITextFieldViewMode.always
}
func showSecureCharacters(){
if self.isSecureTextEntry {
self.isSecureTextEntry = false
} else {
self.isSecureTextEntry = true
}
if !self.isSecureTextEntry{
self.isSecureTextEntry = true
} else {
self.isSecureTextEntry = false
}
}
}
答案 0 :(得分:1)
您可以访问发件人
overlayButton.addTarget(self, action: #selector(showSecureCharacters(_:)), for: .touchUpInside)
//
@objc func showSecureCharacters(_ sender:UIButton){ --- }
这也足够
self.isSecureTextEntry = !self.isSecureTextEntry