How do I add and remove uilabel and uiswitch in uiview by programitically, , in iOS

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iOS

iOS7

i have added Label's and Switch's by this manner ...
when i move slider to increase the value then it should be added one by one as per slider value,,
but now i want to remove label's and switch's one by one as per i move the slider value in decreasing manner...

What I have tried:

//for creation of  UISwitch,,
for (int i=1; i<=self.slider.value; i++) {
            self.switch1=[[UISwitch alloc]initWithFrame:CGRectMake(x, y, 0, 0)];
            [self.resultTextView addSubview:self.switch1];
            x+=50;
            if (x>=280) {
                x=10;
                y+=35;
            }
        }

// for creation of  UILabel
for (int i=1; i<=self.slider.value; i++) {
            self.label1=[[UILabel alloc]initWithFrame:CGRectMake(x, y, 25, 25)];
            self.label1.text=[NSString stringWithFormat:@"%d",i];
            [self.resultTextView addSubview:self.label1];
            x+=30;
            if (x>=280) {
                x=10;
                y+=30;
            }
        }