IOS-45-登录页面相关设置之手机号（只显示数字键盘、只允许输入数字、只允许输11位数）

1.首先要遵循UITextFieldDelegate代理，将相应的输入框设置代理，如：

_mobileText.delegate = self; //文本编辑代理

直接上代码吧：

//提交按钮
- (IBAction)submitNewPwdClick {
    if (_mobileText.text.length == 0) {
        [self.HUD showToastWithText:@"手机号不能为空" FromView:self.view];
    }
    else if (![self checkPhoneNumInput:_mobileText.text]){
        [self.HUD showToastWithText:@"请输入合法手机号" FromView:self.view];
    }
    else if (_SMSCodeText.text.length == 0){
        [self.HUD showToastWithText:@"验证码不能为空" FromView:self.view];
    }
    else if (_pwdText.text.length > 32 || _pwdText.text.length < 6)
    {
        [self.HUD showToastWithText:@"请输入6-32位新密码" FromView:self.view];
    }
    else
    {
        [self.HUD showToastWithText:@"正在提交···" FromView:self.view];
            //修改密码成功
//            [TLDUserManager saveUserMobile:_mobileText.text];
//            [TLDUserManager saveUserPassword:_pwdText.text];
            [self dismissViewControllerAnimated:YES completion:nil];

    }
}


#pragma mark UITextFieldDelegate
//只允许输入数字，且只有11位数
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    if (textField.text.length == 11) {
        if ([string isEqualToString:@""]) {
            return YES;
        }
        else {
            return NO;
        }
    }
    return [self validateNumber:string];
}
//只允许输入数字
- (BOOL)validateNumber:(NSString*)number{
    BOOL res = YES;
    NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];
    int i = 0;
    while (i < number.length) {
        NSString * string = [number substringWithRange:NSMakeRange(i, 1)];
        NSRange range = [string rangeOfCharacterFromSet:tmpSet];
        if (range.length == 0) {
            res = NO;
            break;
        }
        i++;
    }
    return res;
}



//检查是否为手机号的方法
-(BOOL)checkPhoneNumInput:(NSString *)phoneStr
{
    NSString *photoRange = @"^1(3[0-9]|4[0-9]|5[0-9]|7[0-9]|8[0-9])\\d{8}$";//正则表达式
    NSPredicate *regexMobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",photoRange];
    BOOL result = [regexMobile evaluateWithObject:phoneStr];
    if (result) {
        return YES;
    } else {
        return NO;
    }

}

2.上面用到了一个对MBProgressHUD封装的简便类，详情请参考博文：
http://blog.youkuaiyun.com/iot_li/article/details/50215715