UISwitch 在 on/off 后重置 TextField 值

Question

我创造了

- (IBAction)passwordSwitchPressed:(id)sender {
    if (self.passwordSwitch.isOn) {
        self.passwordTextField.secureTextEntry = YES;

    }
    else {
        self.passwordTextField.secureTextEntry = NO;
    }
}

条件是如果开关打开，密码文本字段安全输入打开，否则关闭。一切正常，但如果我从打开更改为关闭，然后再返回打开，密码文本字段中的值就会消失。如何解决？

Answer 1

尽量参考输入，让我知道:)

- (IBAction)passwordSwitchPressed:(id)sender 
{
    NSString * passValue = self.passwordTextField.text;

    self.passwordTextField.secureTextEntry = self.passwordSwitch.isOn;
    self.passwordTextField.text = passValue;
}

Answer 2

将委托设置到文本字段后。试试下面的方法。希望有用。

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    NSString *oldString = [textField.text stringByReplacingCharactersInRange:range withString:string];

    textField.text = oldString;

    return NO;
}