DAKeyboardControl Introduction - 陈斌彬的技术博客

DAKeyboardControl allows you to easily add keyboard awareness and scrolling dismissal (a receding keyboard ala iMessages app) to any UIView,UIScrollView or UITableView with only 1 line of code. DAKeyboardControl automatically extends UIView and provides a block callback with the keyboard’s current frame.

DAKeyboardControl now fully supports orientation changes, iPhone & iPad, and is even aware of keyboard undocking or splitting on the iPad.

No hacks, fully App Store safe.

Screenshot

Video demonstration on YouTube

Installation

Copy over the DAKeyboardControl folder to your project folder.
#import "DAKeyboardControl.h"

Usage

Example project included (DAKeyboardControlExample)

Adding pan-to-dismiss (functionality introduced in iMessages)

[self.view addKeyboardPanningWithActionHandler:^(CGRect keyboardFrameInView) {
        // Move interface objects accordingly
        // Animation block is handled for you
    }];
    // Make sure to call [self.view removeKeyboardControl] before the view is released.
    // (It's the balancing call)

Adding keyboard awareness (appearance and disappearance only)

[self.view addKeyboardNonpanningWithActionHandler:^(CGRect keyboardFrameInView) {
        // Move interface objects accordingly
        // Animation block is handled for you
    }];
    // Make sure to call [self.view removeKeyboardControl] before the view is released.
    // (It's the balancing call)

Supporting an above-keyboard input view

The keyboardTriggerOffset property allows you to choose at what point the user’s finger “engages” the keyboard.

self.view.keyboardTriggerOffset = 44.0f;    // Input view frame height

[self.view addKeyboardPanningWithActionHandler:^(CGRect keyboardFrameInView) {
        // Move input view accordingly
        // Animation block is handled for you
    }];
    // Make sure to call [self.view removeKeyboardControl] before the view is released.
    // (It's the balancing call)

Dismissing the keyboard (convenience method)

[self.view hideKeyboard];

Remove the NSNotification observer at the end of a VC’s life (convenience method)

[self.view removeKeyboardControl];

Notes

Tested in App Store!

All code is iOS 5.0+ safe and well documented, and is already in production apps on the App Store.

Using with a `UITextView`

Make sure to call addKeyboardPanningWithActionHandler: on the UITextView itself if you wish for it to allow panning inside itself.

Keyboard Delay On First Appearance

Standard iOS issue. Use Brandon William’s UIResponder category to cache the keyboard before first use.

Automatic Reference Counting (ARC) support

DAKeyboardControl was made with ARC enabled by default.

Contact

If you use/enjoy DAKeyboardControl, let me know!

License

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.