A TweetBot-like notice component for iOS.
Objective-C Ruby
Latest commit aea3a0c Sep 27, 2013 Tito Ciuro Share the scheme.
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NoticeView Added optional edgeInsets to notice views Jul 2, 2013
LICENSE added license May 16, 2012
README.md Added 'NoticeView SLOCCount Stats' section. Nov 21, 2012



A TweetBot-like notice component for iOS.

Alt text


  • Drop the WBNoticeView folder in your project
  • Add QuartzCore.framework to your project

New in 3.0: Cleaner API, easier customization and more

First and foremost, please note that in v3.0 the API has changed. Instead of deprecating and complicating the API, it was decided to replace some of the methods. NoticeView is a tiny library, so the impact should be minimal and the code easy to adapt.

Why the change? Prior to v3.0, it was fairly difficult to customize the look and feel given the current structure of the notice classes. This version simplifies that task, improves accessibility, and enhances the utility of the tap to dismiss functionality.

Here is the brief of the changes introduced in v3.0:

  • Adds a .podspec file to the repository.
  • Updated the internals of WBNoticeView to set up accessibility labels and attributes for the notice. These changes make it easy to target the notice views inside of tests while performing functional testing (e.g. KIF https://github.com/square/KIF).
  • It's now easier to customize NoticeView.
  • Tap to dismiss behaviors are much more flexible. It's possible to determine if a notice was dismissed interactively in the dismissal block, allowing for Growl style notifications that can be responded to on tap or automatically dismissed. Notices can also be optionally dismissed via tap before the display duration has expired.

Acknowledgments: big thanks to @blakewatters for taking the time to refactor, document and cleanup the code.

New in 2.4: Specify a completion block when a notice is dismissed

Starting with 2.4, any notice can have a completion block associated with it. This block will be invoked when the notice has been dismissed (works on sticky and non-sticky notices):

WBErrorNoticeView *notice = [WBErrorNoticeView errorNoticeInView:self.view title:NSLocalizedString(@"Signup Error", nil) message:NSLocalizedString(@"You need to fill out all entries in this screen to signup.", nil)];
notice.sticky = YES;
notice.dismissedBlock = ^{
    NSLog(@"The notice has been dismissed!");

New in 2.3.1: Dismissing a Notice Manually

Starting with 2.3.1, any notice with the 'sticky' property set can be dismissed at will. This could happen for example when an specific event is detected. Just invoke 'dismissNotice' on the notice whenever you're ready to dismiss it:

[myNotice dismissNotice];

Check the demo project to see it in action.

New in 2.3: Make any Notice Sticky

Some users have asked whether 'sticky' could be a property of any notice view. Well, I'm happy to report that starting with version 2.3, all notice types can be made sticky. The usage follows the regular pattern, only this time we set the 'sticky' property accordingly:

WBErrorNoticeView *notice = [WBErrorNoticeView errorNoticeInView:self.view title:@"Network Error" message:@"Check your network connection."];
notice.sticky = YES;
[notice show];

New in 2.1: Sticky Notice

New in 2.1 is a different type of notice: Sticky. As it name implies, the notice will remain visible until the user taps on it to dismiss it. The usage follows the Error and Success notice pattern:

WBStickyNoticeView *notice = [WBStickyNoticeView stickyNoticeInView:self.view title:@"7 New Tweets."];
[notice show];

NoticeView 1.0 vs 2.0

The behavior in version 1 was "fire and forget". Calling showErrorNoticeInView or showSuccessNoticeInView displayed the notice, but there was no way to retain it for later use. Version 2 allows the developer to instantiate a notice, customize it (optional) and show it. Not only it's possible to retain it, but also customize it anytime with say, a different title and message. Oh, yeah… and it's cleaner too.


Since version 2 is more flexible, I have eliminated the older examples and replaced them with the new API. Please note that the older API is still there, for backward compatibility.

To display a small error notice:

WBErrorNoticeView *notice = [WBErrorNoticeView errorNoticeInView:self.view title:@"Network Error" message:@"Check your network connection."];
[notice show];

If the message provided doesn't fit in one line, the notice will be enlarged to accommodate the text:

WBErrorNoticeView *notice = [WBErrorNoticeView errorNoticeInView:self.view title:@"Network Error" message:@"Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."];
[notice show];

To display a small success notice:

WBSuccessNoticeView *notice = [WBSuccessNoticeView successNoticeInView:self.view title:@"Link Saved Successfully"];
[notice show];

Customizing the Notice

Instead of piling up a bunch of arguments in a method call, I decided to use properties instead. This way, new properties can be added easily without having to clutter the API with specialized methods.

Example: customize a success notice with a bit of transparency and placing the notice at a specific Y coordinate:

WBSuccessNoticeView *notice = [WBSuccessNoticeView successNoticeInView:self.view title:@"Link Saved Successfully"];

notice.alpha = 0.8;
notice.originY = self.headerView.frame.size.height;

[notice show];


If you pass nil instead of a valid UIView, an NSInvalidArgumentException exception will be raised.

The default values are the following:

    if (nil == title) title = @"Unknown Error";
    if (nil == message) message = @"Information not provided.";
    if (0.0 == duration) duration = 0.5;
    if (0.0 == delay) delay = 2.0;
    if (0.0 == alpha) alpha = 1.0;
    if (origin < 0.0) origin = 0.0;

NoticeView SLOCCount Stats

Who doesn't like stats? ;-) Here are some as reported by SLOCCount:

SLOC    Directory               SLOC-by-Language (Sorted)
797     NoticeView              objc=797
245     NoticeViewiPad          objc=245
0       NoticeView.xcode        proj (none)
0       top_dir                 (none)

Totals grouped by language (dominant language first):

objc:          1042 (100.00%)

Total Physical Source Lines of Code (SLOC)                = 1,042
Development Effort Estimate, Person-Years (Person-Months) = 0.21 (2.51) (*)
Schedule Estimate, Years (Months)                         = 0.30 (3.54) (**)
Estimated Average Number of Developers (Effort/Schedule)  = 0.71
Total Estimated Cost to Develop                           = $ 50,119 (***)

(*)   Basic COCOMO model, Person-Months = 2.4 * (KSLOC**1.05)
(**)  Basic COCOMO model, Months = 2.5 * (person-months**0.38)
(***) Average salary = $100,000/year, overhead = 2.40

SLOCCount, Copyright (C) 2001-2004 David A. Wheeler

Latest salary information


I'd love to include your contributions. Feel free to improve it, send comments or suggestions. If you have improvements please send me a pull request.

Contact Me

You can ping me on Twitter — @titusmagnus.