Question

In my app for iPhone/iPad (in Objective-C), there are some UITextFields which I am adding progrmatically and these further added to array.

I want to set the hidden property on some button click (where I found the particular UITextField by traversing the array).

When I set the textfilled.hidden = true (at button click event), then it is not hidden instead in disabled mode and if I again set textfilled.hidden = false, then it enables.

I have tried changing other properties like text, background color etc. at the same level all works fine except the hidden property.

Note: If it set textfilled.hidden = true after adding the text field (with the same object of UITextField) then it hides perfectly.

UPDATE: I have used the following code:

UITextField *textField=[[[UITextField alloc] initWithFrame:CGRectMake(lastPoint.x, lastPoint.y, 60, 20)] autorelease];
    textField.backgroundColor=[UIColor greenColor];    
    textField.textColor=[UIColor blackColor];
    [textField addTarget:self action:@selector(handleEnterPressed:) forControlEvents:UIControlEventEditingDidEndOnExit];
    [capturedImage addSubview:textField];
    [noteTextArray addObject:textField];

In this I am creating a UITextField and adding it to array(noteTextArray) and the calling the .hidden property here:

-(void)handleEnterPressed:(UITextField *)textField 
{
for(UITextField *noteText in noteTextArray)
{
    if(noteText.tag==textField.tag)
    {
        noteText.backgroundColor=[UIColor purpleColor];
        noteText.text=@"Hi";
        noteText.hidden=true;
    }
}
}

But it is not hiding the text field.

Please let me know if somebody has any idea or solution.

UPDATE 1: Image has been taken by capturing the screenshot of current view of WebView

 UIGraphicsBeginImageContextWithOptions(webview.frame.size,NO,0.0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetInterpolationQuality(context, kCGInterpolationHigh);
    [webview.layer renderInContext: context];
    capturedImage.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();    

And the image further added to uiscrollviewer:

 scrollViewer.delegate=self;    
        scrollViewer.contentOffset = CGPointZero;
        capturedImage.contentMode= UIViewContentModeScaleAspectFit;
        scrollViewer.userInteractionEnabled=true;
        scrollViewer.contentMode= UIViewContentModeScaleAspectFit;
        scrollViewer.scrollEnabled=YES;
        [scrollViewer setBouncesZoom:YES];
        scrollViewer.clipsToBounds= YES;
        scrollViewer.contentSize = capturedImage.image.size;
        scrollViewer.minimumZoomScale=0.1;
        scrollViewer.maximumZoomScale=5.0;
        scrollViewer.zoomScale=0.5;
        if(capturedImage.superview != scrollViewer)
        {
            [scrollViewer addSubview:capturedImage];
        }

Answer 1

Property cannot set as active and deactivate so This will be better approach if u set the property according to the situation like on button 1 pressed

textField.textAlignment = UITextAlignmentCenter;

and on button pressed

textField.textAlignment = UITextAlignmentLeft;

update:

   field.selected = TRUE;

    if([field isHidden])
{
    [field setHidden:FALSE];
}
else  
{
    [field setHidden:TRUE];
}

Update 2:

- (void)viewDidLoad 
{
    [super viewDidLoad];

    field = [[UITextField alloc] initWithFrame:CGRectMake(120, 20, 150, 20)];
    [self.view addSubview:field];
    field.placeholder = @"placeholder";
    field.backgroundColor = [UIColor redColor];
    field.textColor = [UIColor whiteColor];

}

-(IBAction) btnPressed:(id)sender
{

    field.selected = TRUE;

        if([field isHidden])
    {
        [field setHidden:FALSE];
    }
    else  
    {
        [field setHidden:TRUE];
    }


}

update 3: please download the sample code (testTextField)