JTGestureBasedTableView

An iOS objective-c library template to recreate the gesture based interaction found from Clear for iPhone app.

This project is aimed to be a truely flexible solution, but currently it's still in development stage and missing a few features.

Known Issues

It has been developed under iOS 4.3 and 5.0 devices, sample code has been built using ARC (not quite properly). I am still studying to have a proper refactor on my code for a real ARC adoption. There's currently one known issues related to running on non-arc enviornment (e.g. refs #4). Please use -fobjc-arc per source file complier flag for compiling on non-ARC enviroment.

Abstract

Clear for iPhone app has showed us so much we can do with a buttonless interface, and I am trying to reveal the technique behind the gesture based interaction, hopefully can heavy-lifted all of us whom trying to achieve the same.

Demo

Features

It only supports three features at the moment.

Pull down to add cell
Pinch to create cell
Panning on cell gesture
Long hold to reorder cell

How To Use It

Installation

Include all header and implementation files in JTGestureBasedTabeView/ into your project, and also links the QuartzCore framework to your target.

Setting up your UITableView for your viewController

#import "JTTableViewGestureRecognizer.h"

@interface ViewController () <JTTableViewGestureAddingRowDelegate, JTTableViewGestureEditingRowDelegate>
@property (nonatomic, strong) NSMutableArray *rows;
@property (nonatomic, strong) JTTableViewGestureRecognizer *tableViewRecognizer;
@end

@implementation ViewController
@synthesize tableViewRecognizer;

- (void)viewDidload {
    /*
    :
    */

    // In our examples, we setup self.rows as datasource
    self.rows = ...;
    
    // Setup your tableView.delegate and tableView.datasource,
    // then enable gesture recognition in one line.
    self.tableViewRecognizer = [self.tableView enableGestureTableViewWithDelegate:self];
}

Enabling adding cell gestures

// Conform to JTTableViewGestureAddingRowDelegate to enable features
// - drag down to add cell
// - pinch to add cell
@protocol JTTableViewGestureAddingRowDelegate <NSObject>

- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsAddRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsCommitRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsDiscardRowAtIndexPath:(NSIndexPath *)indexPath;

@optional

- (NSIndexPath *)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer willCreateCellAtIndexPath:(NSIndexPath *)indexPath;
- (CGFloat)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer heightForCommittingRowAtIndexPath:(NSIndexPath *)indexPath;

@end

Enabling editing cell gestures

// Conform to JTTableViewGestureEditingRowDelegate to enable features
// - swipe to edit cell
@protocol JTTableViewGestureEditingRowDelegate <NSObject>

// Panning (required)
- (BOOL)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer canEditRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer didEnterEditingState:(JTTableViewCellEditingState)state forRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer commitEditingState:(JTTableViewCellEditingState)state forRowAtIndexPath:(NSIndexPath *)indexPath;

@optional

- (CGFloat)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer lengthForCommitEditingRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer didChangeContentViewTranslation:(CGPoint)translation forRowAtIndexPath:(NSIndexPath *)indexPath;

@end

Enabling reorder cell gestures

// Conform to JTTableViewGestureMoveRowDelegate to enable features
// - long press to reorder cell
@protocol JTTableViewGestureMoveRowDelegate <NSObject>

- (BOOL)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer canMoveRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsCreatePlaceholderForRowAtIndexPath:(NSIndexPath *)indexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsMoveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;
- (void)gestureRecognizer:(JTTableViewGestureRecognizer *)gestureRecognizer needsReplacePlaceholderForRowAtIndexPath:(NSIndexPath *)indexPath;

@end

You choose what to enable

You can pick what gestures to be enabled by conforming to the appropriate protocols. Don't forget to look at JTGestureBasedTableViewDemo/ViewController.m for a complete working usage.

License

This project is under MIT License, please feel free to contribute and use it.

James

acroedit/JTGestureBasedTableViewDemo