加密的UITextField在重新输入密码时,总会clear之前的内容


-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *updatedString = [textField.text stringByReplacingCharactersInRange:range withString:string]; textField.text = updatedString; return NO;
}

UITextField with secure entry, always getting cleared before editing

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