iOS 输入验证码或密码,自动下一位的实例

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

自动跳转下一位

 

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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