Solved

iPhone app development: Can I programmatically change the screen brightness?

Posted on 2009-05-08
4
3,247 Views
Last Modified: 2012-05-06
Hi all,

So I just added a UIActivityIndicator to my app. It works fine but it's not very flashy and there's not always a great place for it on the screen. So, what I would like to do is to make the entire screen much darker and then put the activity indicator right in the middle, as I know I've seen that elsewhere.

Does anyone know of a way to do this?

Thanks for any suggestions?
0
Comment
Question by:ehensens
  • 2
4 Comments
 

Expert Comment

by:allentheg
ID: 24339234
You can do this easily by using the interface builder. Double-click on the .xib file that you are working on, and the interface builder will load up. From there, you will see a white rectangle. This is where you can items into your iphone app and it will show up when you run it. You can change the background of the view to a darker color. You can also drag and drop your UIActivityIndicator into the middle of your interface.
0
 

Author Comment

by:ehensens
ID: 24339251
The problem is I need to change this from my code, it needs to go darker when I load up the indicator and then back to normal when the indicator is turned off.
0
 
LVL 8

Accepted Solution

by:
inbox788 earned 500 total points
ID: 24339405
0
 

Expert Comment

by:allentheg
ID: 24339406

-(void)hideActivityViewer

{

	[[[activityView subviews] objectAtIndex:0] stopAnimating];

	[activityView removeFromSuperview];

	activityView = nil;

}

 

-(void)showActivityViewer

{

	[activityView release];

	activityView = [[UIView alloc] initWithFrame: CGRectMake(0, 0, window.bounds.size.width, window.bounds.size.height)];

	activityView.backgroundColor = [UIColor blackColor];

	activityView.alpha = 0.5;

	

	UIActivityIndicatorView *activityWheel = [[UIActivityIndicatorView alloc] initWithFrame: CGRectMake(window.bounds.size.width / 2 - 12, window.bounds.size.height / 2 - 12, 24, 24)];

	activityWheel.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;

	activityWheel.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin |

									 UIViewAutoresizingFlexibleRightMargin |

									 UIViewAutoresizingFlexibleTopMargin |

									 UIViewAutoresizingFlexibleBottomMargin);

	[activityView addSubview:activityWheel];

	[activityWheel release];

	[window addSubview: activityView];

	[activityView release];

	

	[[[activityView subviews] objectAtIndex:0] startAnimating];

}

Open in new window

0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Ph0en1x3
Abstract - With Apple producing millions of units annually, it might make good business sense to become an Apple Certified Development center. The iPhone, iPad, and iPod consistently use the same SDK and development methodologies and this process al…
Learn new improvements released by Google for Google Calendar. Noted in this article are simple tips and tricks that can make your everyday use of Google Calendar better.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
CodeTwo Sync for iCloud (http://www.codetwo.com/sync-for-icloud?sts=6554) automatically synchronizes your Outlook 2016, 2013, 2010 or 2007 folders with iCloud folders available via iCloud Control Panel. This lets you automatically sync them with…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now