密钥 - 明文 - 密钥 这时候按删除键 所有的都内容都没了(正常应该是只少了一个字符)
解决办法:
(BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string
{
//iOS iUITextField的secureTextEntry 切换bug
NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];
if (textField == self.passworldTextField&& textField.isSecureTextEntry) {
textField.text= toBeString;
returnNO;
}
returnYES;
}
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