how to make textView expandable by clicking on a button - iphone

Question

I have many textViews on top of a scrollView and every textView has a custom button over it so that when user click that textView it should expand and when it click back then it should collapse to previous position.
what I'm thinking of doing is hide the smallTextView and show the expandedTextView when button is pressed and when the button is pressed i want to hide expandedtextView n show the smallTextView. but I don't know how i should do it. any help will be appreciated.
Here is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.title = #"Demo";
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
for (int i=0;i<[appDelegate.serverResponseArray count];i++)
{
self.expandTextView = [[UITextView alloc] init];
[self.expandTextView setFrame:CGRectMake(8.0f, i*50.0f+10.0f, 270.0f, 40.0f)];
[self.expandTextView setBackgroundColor:[UIColor grayColor]];
[self.expandTextView setFont:[UIFont fontWithName:#"helvetica" size:12]];
[self.expandTextView setText:#"Welcome!!!"];
[self.expandTextView setTextColor:[UIColor colorWithRed:255.0f/255.0f green:255.0f/255.0f blue:255.0f/255.0f alpha:1]];
[self.expandTextView setUserInteractionEnabled:NO];
[self.scrollView addSubview:self.expandTextView];
self.expandTextView = nil;
self.expandButton = [[UIButton alloc]initWithFrame:CGRectMake(8.0f, i*50.0f+1.0f, 270.0f, 60.0f)];
[self.expandButton setBackgroundColor:[UIColor clearColor]];
[self.expandButton addTarget:self action:#selector(textButtonClicked:) forControlEvents:UIControlEventTouchDragInside];
[self.scrollView addSubview:self.expandButton];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(278.0f, i*50.0f+10.0f, 14.0f, 40.0f)];
[imageView setBackgroundColor:[UIColor grayColor]];
[imageView setImage:[UIImage imageNamed:#"arrow.png"]];
[self.scrollView addSubview:imageView];
imageView = nil;
}
float maxHeight = 0;
for(UIView *v in [self.scrollView subviews])
{
if(v.frame.origin.x + v.frame.size.height > maxHeight)
maxHeight = v.frame.origin.x + v.frame.size.height;
}
self.scrollView.contentSize = CGSizeMake(_scrollView.frame.size.width, maxHeight+2570);
}
-(void)textButtonClicked:(id)sender
{
NSLog(#"Hi");
[self.expandTextView setHidden:YES\];
NSLog(#"hey");
}
and how do I know which button is getting pressed.

Answer 1

You are doing it wrong. Your method should look like this :
-(IBAction)textButtonClicked:(id)sender
{
NSLog(#"Hi");
[self.expandTextView setHidden:YES];
NSLog(#"hey");
}
After writing this Method in your ViewContrller, wire up your Expand Button's -touchUpInside Method to -textButtonClicked Method. Use this line :
[self.expandButton addTarget:self action:#selector(textButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
instead the one in your code.