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iphone - Dynamically insert more UITextFields

I have a requirement as described in the attached screen shot. When blue add button is clicked, one more UItextfield have to be inserted between last text field and textview and Blue add button will have to appear beside that dynamically inserted new uitextfield. Could any one suggest how to achieve this. I have placed all the fields in UIScrollview.

enter image description here

Scroll view is not enabled:

enter image description here

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You can do as :

In .h I have an outlet called previousTextField which is hooked to the first one. As name suggests it will store the latest added textField.

Find running project here.

-(IBAction)addTextField:(id)sender{
    float x=previousTextField.frame.origin.x;
    float y=previousTextField.frame.origin.y+50;//get y from previous textField and add 10 or so in it.
    float w=previousTextField.frame.size.width;
    float h=previousTextField.frame.size.height;
    CGRect frame=CGRectMake(x,y,w,h);
    UITextField *textField=[[UITextField alloc] initWithFrame:frame];
    textField.placeholder = @"Enter User Name or Email";


    textField.borderStyle = UITextBorderStyleRoundedRect;
    textField.font = [UIFont systemFontOfSize:15];
    textField.autocorrectionType = UITextAutocorrectionTypeNo;
    textField.keyboardType = UIKeyboardTypeDefault;
    textField.returnKeyType = UIReturnKeyDone;
    textField.clearButtonMode = UITextFieldViewModeWhileEditing;


    [self.view addSubview:textField];
    previousTextField=textField;
}

Just an idea/algorithm how to go with, not compiler checked

I missed on thing, changing the location of + button. I think you can do it :)

EDIT: add following in above method

//move addbutton which is an outlet to the button
CGRect frameButton=CGRectMake(addButton.frame.origin.x, addButton.frame.origin.y+50, addButton.frame.size.width, addButton.frame.size.height);
[addButton removeFromSuperview];
[addButton setFrame:frameButton];
[self.view addSubview:addButton];

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