之前在cocoachina看到一篇文章http://www.cocoachina.com/ios/20160106/14889.html,挺实用的,非常好用,肯定以后可以遇到,登录的时候肯定能遇到
安康;(空白)textFieldTextDidChanged:(UITextField *)发送者
{
,,,NSString *, tempString =, sender.text;
,,,,
,,,if (sender.markedTextRange ==, nil ,,, tempString.length 祝辞,kMaxLength)
,,,{
,,,,,,,sender.text =, [tempString substringToIndex kMaxLength):;
,,,,,,,(sender.undoManager removeAllActions);
,,,}
}
