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输入验证码或密码，自动下一位 iOS

2017-12-28 17:07 267 查看
系统没有textFeild 的相关当输入内容改变时候的代理方法。。。所以我们自己加一个监听来实现如下的效果



主要代码如下：

[_code1F becomeFirstResponder];
[_code1F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
[_code2F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
[_code3F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
[_code4F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
[_code5F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
[_code6F addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];


-(void)textFieldDidChange :(UITextField *)textField{
if (textField.text.length == 1) {
if (textField == _code1F) {
[_code2F becomeFirstResponder];
}else if (textField == _code2F){
[_code3F becomeFirstResponder];
}else if (textField == _code3F){
[_code4F becomeFirstResponder];
}else if (textField == _code4F){
[_code5F becomeFirstResponder];
}else if (textField == _code5F){
[_code6F becomeFirstResponder];
}else{
[self.view endEditing:YES];
}
}
}
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