Advanced Search

scrolling view problem when device is changing orientation

/ Published in: iPhone
Save to your folder(s)
when changing orientation the scrollview has extra content size

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. #define SCROLLVIEW_CONTENT_HEIGHT_PORTRAIT	800
  2. #define SCROLLVIEW_CONTENT_WIDTH_PORTRAIT	320
  3. #define SCROLLVIEW_CONTENT_HEIGHT_LANDSCAPE     670
  4. #define SCROLLVIEW_CONTENT_WIDTH_LANDSCAPE	480
  5.  
  6. ........
  7. - (void)viewWillAppear:(BOOL)animated 
  8. {
  9. 	[super viewWillAppear:animated];
  10.  
  11. 	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) 
  12. 										name: UIKeyboardDidShowNotification object:nil];
  13. 	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) 
  14. 										name: UIKeyboardDidHideNotification object:nil];
  15.  
  16. 	m_scrollView.contentSize = CGSizeMake(SCROLLVIEW_CONTENT_WIDTH_PORTRAIT, SCROLLVIEW_CONTENT_HEIGHT_PORTRAIT);	
  17. 	displayKeyboard = NO;
  18. }
  19.  
  20. - (void)viewWillDisappear:(BOOL)animated 
  21. {
  22. 	[[NSNotificationCenter defaultCenter] removeObserver:self];
  23. }
  24.  
  25. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
  26. {
  27. 	// Return YES for supported orientations 
  28. 	return (interfaceOrientation !=	UIInterfaceOrientationPortraitUpsideDown);
  29. }
  30.  
  31. - (void)keyboardDidShow: (NSNotification *)notif 
  32. {
  33. 	if (displayKeyboard) {
  34. 		return;
  35. 	}	
  36.  
  37. 	if (self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft || 
  38. 		self.interfaceOrientation == UIInterfaceOrientationLandscapeRight) 
  39. 	{
  40. 		m_scrollView.frame = CGRectMake(0, 0, SCROLLVIEW_CONTENT_WIDTH_LANDSCAPE, 140);
  41. 	}
  42. 	else 
  43. 	{
  44. 		m_scrollView.frame = CGRectMake(0, 0, SCROLLVIEW_CONTENT_WIDTH_PORTRAIT, 240);
  45. 	}
  46.  
  47. 	CGRect textFieldRect = [m_activeField frame];
  48. 	textFieldRect.origin.y += 10;
  49. 	[m_scrollView scrollRectToVisible:textFieldRect animated:YES];
  50.  
  51. 	displayKeyboard = YES;
  52. }
  53.  
  54. - (void) keyboardDidHide: (NSNotification *)notif 
  55. {
  56. 	if (!displayKeyboard) {
  57. 		return; 
  58. 	}
  59.  
  60. 	if (self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft || 
  61. 		self.interfaceOrientation == UIInterfaceOrientationLandscapeRight) 
  62. 	{
  63. 		m_scrollView.frame = CGRectMake(0, 0, SCROLLVIEW_CONTENT_WIDTH_LANDSCAPE, 300);
  64. 		m_scrollView.contentSize = CGSizeMake(SCROLLVIEW_CONTENT_WIDTH_LANDSCAPE, SCROLLVIEW_CONTENT_HEIGHT_LANDSCAPE);
  65. 	}
  66. 	else
  67. 	{
  68. 		m_scrollView.frame = CGRectMake(0, 0, SCROLLVIEW_CONTENT_WIDTH_PORTRAIT, 460);
  69. 		m_scrollView.contentSize = CGSizeMake(SCROLLVIEW_CONTENT_WIDTH_PORTRAIT, SCROLLVIEW_CONTENT_HEIGHT_PORTRAIT);
  70. 	}
  71.  
  72. 	displayKeyboard = NO;	
  73. }

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.