A subclass of UITableViewCell inspired by Google's Material Design: Paper Elements.

Animated Screenshot

Changes

Please see included CHANGELOG file.

About

Now with smoother animations and more public properties for even easier customization!

BFPaperTableViewCell is a subclass of UITableViewCell that behaves much like the new paper table cells from Google's Material Design Labs. All animation are asynchronous and are performed on sublayers. BFPaperTableViewCells work right away with pleasing default behaviors, however they can be easily customized! The tap-circle color, background fade color, background fade alpha, background highlight (linger or fade away), tap-circle ripple locaiton, and tap-circle diameter are all readily customizable via public properties.

By default, BFPaperTableViewCells use "Smart Color" which will match the tap-circle and background fade colors to the color of the textLabel. You can turn off Smart Color by setting the property, .usesSmartColor to NO. If you disable Smart Color, a gray color will be used by default for both the tap-circle and the background color fade. You can set your own colors via: .tapCircleColor and .backgroundFadeColor. Note that setting these disables Smart Color.

Properties

BOOL usesSmartColor
A flag to set YES to use Smart Color, or NO to use a custom color scheme. While Smart Color is the default (usesSmartColor = YES), customization is cool too.

CGFloat touchDownAnimationDuration
A CGFLoat representing the duration of the animations which take place on touch DOWN! Default is 0.25f seconds. (Go Steelers)

CGFloat touchUpAnimationDuration
A CGFLoat representing the duration of the animations which take place on touch UP! Default is 2 * touchDownAnimationDuration seconds.

CGFloat tapCircleDiameterStartValue
A CGFLoat representing the diameter of the tap-circle as soon as it spawns, before it grows. Default is 5.f.

CGFloat tapCircleDiameter
The CGFloat value representing the Diameter of the tap-circle. By default it will be the result of MAX(self.frame.width, self.frame.height). tapCircleDiameterFull will calculate a circle that always fills the entire view. Any value less than or equal to tapCircleDiameterFull will result in default being used. The constants: tapCircleDiameterLarge, tapCircleDiameterMedium, and tapCircleDiameterSmall are also available for use. */

CGFloat tapCircleBurstAmount
The CGFloat value representing how much we should increase the diameter of the tap-circle by when we burst it. Default is 100.f.

UIColor *tapCircleColor
The UIColor to use for the circle which appears where you tap. NOTE: Setting this defeats the "Smart Color" ability of the tap circle. Alpha values less than 1 are recommended.

UIColor *backgroundFadeColor
The UIColor to fade clear backgrounds to. NOTE: Setting this defeats the "Smart Color" ability of the background fade. Alpha values less than 1 are recommended.

BOOL rippleFromTapLocation
A flag to set to YES to have the tap-circle ripple from point of touch. If this is set to NO, the tap-circle will always ripple from the center of the view. Default is YES.

BOOL letBackgroundLinger
A BOOL flag that determines whether or not to keep the background around after a tap, essentially "highlighting/selecting" the cell. Note that this does not trigger setSelected:! It is purely aesthetic. Also this kinda clashes with cell.selectionStyle, so by defualt the constructor sets that to UITableViewCellSelectionStyleNone. Default is YES.

BOOL alwaysCompleteFullAnimation
A BOOL flag indicating whether or not to always complete a full animation cycle (bg fade in, tap-circle grow and burst, bg fade out) before starting another one. NO will behave just like the other BFPaper controls, tapping rapidly spawns many circles which all fade out in turn. Default is YES.

CGFloat tapDelay
A CGFLoat to set the amount of time in seconds to delay the tap event / trigger to spawn circles. For example, if the tapDelay is set to 1.f, you need to press and hold the cell for 1 second to trigger spawning a circle. Default is 0.1f.

UIBezierPath *maskPath
A UIBezierPath you can set to override the mask path of the ripples and background fade. Set this if you have a custom path for your cell. If this is nil, BFPaperTableViewCell will try its best to provide a correct mask. Default is nil.

Usage

Add the BFPaperTableViewCell header and implementation file to your project. (.h & .m)

After that, you can use it just like any other UITableViewCell.

If you use storyboards with prototype cells, be sure to change the prototype cell's class to BFPaperTableViewCell!

Example

// Register BFPaperTableViewCell for our tableView in viewDidLoad:
- (void)viewDidLoad
{
  ...
  [self.tableView registerClass:[BFPaperTableViewCell class] forCellReuseIdentifier:@"BFPaperCell"];  // NOTE: This is not required if we declared a prototype cell in our storyboard (which this example project does). This is here purely for information purposes.
  ...
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  BFPaperTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"BFPaperCell" forIndexPath:indexPath];
  if (!cell) {
    cell = [[BFPaperTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"BFPaperCell"];
  }
  cell.rippleFromTapLocation = NO; // Will always ripple from center if NO.
  cell.tapCircleColor = [[UIColor paperColorDeepPurple] colorWithAlphaComponent:0.3f];
  cell.backgroundFadeColor = [UIColor paperColorBlue];
  cell.backgroundFadeAlpha = 0.7f;
  cell.letBackgroundLinger = NO;
  cell.tapCircleDiameter = bfPaperTableViewCell_tapCircleDiameterSmall;
  return cell;
}

License

BFPaperTableViewCell uses the MIT License:

Please see included LICENSE file.