Code Quality Rank: L5
Programming language: Objective-C
Tags: UI     Keyboard    
Latest version: v1.0.0

RSKKeyboardAnimationObserver alternatives and similar libraries

Based on the "Keyboard" category.
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RSKKeyboardAnimationObserver License Carthage compatible

Easy way to handle iOS keyboard showing/dismissing.


Working with iOS keyboard demands a lot of duplicated code. This category allows you to declare your animations with smooth keyboard animation timing while writing very little code.


KeyboardAnimationDemo1 KeyboardAnimationDemo2


RSKKeyboardAnimationObserver requires iOS 6.0 or later.

Using CocoaPods

  1. Add the pod RSKKeyboardAnimationObserver to your Podfile.

    pod 'RSKKeyboardAnimationObserver'
  2. Run pod install from Terminal, then open your app's .xcworkspace file to launch Xcode.

  3. Import the RSKKeyboardAnimationObserver.h header. Typically, this should be written as #import <RSKKeyboardAnimationObserver/RSKKeyboardAnimationObserver.h>

Using Carthage

  1. Add the ruslanskorb/RSKKeyboardAnimationObserver project to your Cartfile.

    github "ruslanskorb/RSKKeyboardAnimationObserver"
  2. Run carthage update, then follow the additional steps required to add the iOS and/or Mac frameworks into your project.

  3. Import the RSKKeyboardAnimationObserver framework/module.

    • Using Modules: @import RSKKeyboardAnimationObserver
    • Without Modules: #import <RSKKeyboardAnimationObserver/RSKKeyboardAnimationObserver.h>


Imagine that you need to implement chat-like input over keyboard. OK, import this category.

#import <RSKKeyboardAnimationObserver/RSKKeyboardAnimationObserver.h>

Then make autolayout constraint between your input bottom and superview botton in Interface Builder, connect it with your view controller implementation through IBOutlet.

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *chatInputBottomSpace;

Then subscribe to keyboard in the place you like (viewDidAppear is the best place really).

__weak typeof(self) weakSelf = self;
[self rsk_subscribeKeyboardWithWillShowOrHideAnimation:^(CGRect keyboardRectEnd, NSTimeInterval duration, BOOL isShowing) {
    __strong typeof(self) strongSelf = weakSelf;
    if (strongSelf) {
        strongSelf.chatInputBottomSpace.constant = isShowing ?  CGRectGetHeight(keyboardRectEnd) : 0;
        [strongSelf.view layoutIfNeeded];
} onComplete:nil];

That’s all!

Don’t forget to unsubscribe from keyboard events (viewDidDisappear is my recommendation). Calling this category method will do all the “dirty” work for you.

[self rsk_unsubscribeKeyboard];

For more complex behaviour (like in demo section) you can use extended API call with before animation section.

__weak typeof(self) weakSelf = self;
[self rsk_subscribeKeyboardWithBeforeWillShowOrHideAnimation:^(CGRect keyboardRectEnd, NSTimeInterval duration, BOOL isShowing) {
    __strong typeof(self) strongSelf = weakSelf;
    if (strongSelf) {
        strongSelf.isKeaboardAnimation = YES;

        [UIView transitionWithView:strongSelf.imageView duration:duration options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
            if (isShowing) {
                strongSelf.imageView.image = [strongSelf.imageView.image applyLightEffect];
            } else {
                [strongSelf.imageView hnk_setImageFromURL:strongSelf.model.cardImageUrl];
        } completion:nil];
 } willShowOrHideAnimation:^(CGRect keyboardRectEnd, NSTimeInterval duration, BOOL isShowing) {
    __strong typeof(self) strongSelf = weakSelf;
    if (strongSelf) {
        strongSelf.headerHeight.constant = isShowing ? kHeaderMinHeight : kHeaderMaxHeight;
        strongSelf.panelSpace.constant = isShowing ?  CGRectGetHeight(keyboardRectEnd) : 0;

        for (UIView *v in strongSelf.headerAlphaViews) {
            v.alpha = isShowing ? 0.0f : 1.0f;

        [strongSelf.view layoutIfNeeded];
} onComplete:^(BOOL finished, BOOL isShown) {
    __strong typeof(self) strongSelf = weakSelf;
    if (strongSelf) {
        strongSelf.isKeaboardAnimation = NO;


Ruslan Skorb


This project is is available under the MIT license. See the LICENSE file for more info. Attribution by linking to the project page is appreciated.

*Note that all licence references and agreements mentioned in the RSKKeyboardAnimationObserver README section above are relevant to that project's source code only.