Create programmatically view and controls

//View

CGFloat x=10;

    CGFloat y=20;

    img.alpha=0;

    UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 420)];

    view.backgroundColor=[UIColor purpleColor];

    [self.view addSubview:view];

    

/*scroll view*/

    UIScrollView *sc=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 300, 400)];

    sc.userInteractionEnabled=YES;

    sc.backgroundColor=[UIColor greenColor];

    sc.delegate=self;

    sc.scrollEnabled=YES;

    sc.contentSize=CGSizeMake(400,500);

    [self.view addSubview:sc];

    //textbox

    for(int i=0;i<5;i++)

    {

       textfield=[[UITextField alloc]initWithFrame:CGRectMake(x, y, 100, 40)];

        textfield.tag=i;

        

        textfield.backgroundColor=[UIColor brownColor];

                y+=50;

        [sc addSubview:textfield];

        [textfield addTarget:self action:@selector(textFieldShouldReturn:) forControlEvents:UIControlEventEditingDidEndOnExit];

            }

    //button

   btn =[[UIButton alloc]initWithFrame:CGRectMake(150, 20, 100, 35) ];

    [UIButton buttonWithType:UIButtonTypeCustom] ;

    btn.backgroundColor=[UIColor greenColor];

    [btn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];

    [btn setTitle:@"click" forState:UIControlStateNormal];

    

    [sc addSubview:btn];

    //image

       img=[[UIImageView alloc]initWithFrame:CGRectMake(120, 70, 150, 150) ];

    [img setBackgroundColor:[UIColor grayColor]];

    img.image=[UIImage imageNamed:@"sprathana.jpg"];

    [sc addSubview:img];

     //label

lb=[[UILabel alloc]initWithFrame:CGRectMake(150, 80, 80, 30)];

lb.text=@"welcome";

        lb.backgroundColor=[UIColor lightGrayColor];

    [sc addSubview:lb];

    //slider

    sli=[[UISlider alloc]initWithFrame:CGRectMake(150, 250, 70, 70)];

    sli.maximumValue=1;

    sli.minimumValue=0;

    [sc addSubview:sli];

    sli.userInteractionEnabled=YES;

    img.alpha=sli.value;

    img.alpha=1-sli.value;

    [sli addTarget:self action:@selector(move:) forControlEvents:UIControlEventValueChanged];

    [self.view endEditing:YES];