func textFieldDidBeginEditing(textField: UITextField) {
scrlView.setContentOffset(CGPointMake(0,textField.frame.origin.y-70),animated: true)
if(textField == firstDigit){
textField.becomeFirstResponder()
secondDigit.resignFirstResponder()
}
else if(textField == secondDigit){
textField.becomeFirstResponder()
thirdDigit.resignFirstResponder()
}
else if(textField == thirdDigit){
//textField.becomeFirstResponder()
fourthDigit.becomeFirstResponder()
}
我使用四个文本字段进行OTP输入,其中一次只能输入一个数字.输入数字后,我需要将光标自动移动到下一个文本字段.
设置textField委托并添加目标：
override func viewDidLoad() {
super.viewDidLoad()
first.delegate = self
second.delegate = self
third.delegate = self
fourth.delegate = self
first.addTarget(self,action: "textFieldDidChange:",forControlEvents: UIControlEvents.EditingChanged)
second.addTarget(self,forControlEvents: UIControlEvents.EditingChanged)
third.addTarget(self,forControlEvents: UIControlEvents.EditingChanged)
fourth.addTarget(self,forControlEvents: UIControlEvents.EditingChanged)
}
现在,当文本更改时,更改textField
func textFieldDidChange(textField: UITextField){
let text = textField.text
if text?.utf16.count >= 1{
switch textField{
case first:
second.becomeFirstResponder()
case second:
third.becomeFirstResponder()
case third:
fourth.becomeFirstResponder()
case fourth:
fourth.resignFirstResponder()
default:
break
}
}else{
}
}
最后当用户开始编辑清除textField时
extension ViewController: UITextFieldDelegate{
func textFieldDidBeginEditing(textField: UITextField) {
textField.text = ""
}
}
