BSTableViewReorder

Installation

BSTableViewReorder is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "BSTableViewReorder"

If you used use_framework in your podfile just simply do:

import BSTableViewReorder

for every file when you need to use it.

you may also use:

@import BSTableViewReorder

within bridging header file and avoid to import framework for every needed file.

##Info

• This library is not working with UITableViewAutomaticDimension
• entirely written in latest Swift syntax. Works with iOS 9 and Xcode7

##Usage

1. Simply add BSTableViewReorder as a subclass of your UITableView in Interface Builder.

2. Implement tableView:moveRowAtIndexPath:toIndexPath of the UITableViewDataSource protocol:

func tableView(tableView: UITableView, moveRowAtIndexPath sourceIndexPath: NSIndexPath, toIndexPath destinationIndexPath: NSIndexPath) {

    let obj = data[sourceIndexPath.section][sourceIndexPath.row]
    data[sourceIndexPath.section].removeAtIndex(sourceIndexPath.row)
    data[destinationIndexPath.section].insert(obj, atIndex: destinationIndexPath.row)
}

#####Basic usage for UITableView with one section:

...nothing to do more...

#####Basic usage for UITableView with multiply sections:

Pay attention of every method using indexPath. Since table must always be up to date with data source, you need to care about this. BSTableViewReorder do it for you. All you need to do is to adopt 2 methods: adaptedIndexPathForRowAtIndexPath: and adaptedNumberOfRowsInSection:witNumberOfRows: in your UITableViewDelegate protocol's methods:

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return self.tableView.adaptedNumberOfRowsInSection(section, withNumberOfRows: data[section].count)
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier(CellIdentifier, forIndexPath: indexPath) as! BSTableViewCell
    let adaptedIndexPath = self.tableView.adaptedIndexPathForRowAtIndexPath(indexPath)

    cell.label?.text = data[adaptedIndexPath.section][adaptedIndexPath.row]

    return cell
}

#####Customize the way you work with BSTableViewReorder using BSTableViewReorderDelegate:

@objc public protocol BSTableViewReorderDelegate: class, UITableViewDelegate {

    @objc optional var tableViewCanReorder: Bool { get set }
    @objc optional var snapshotOpacity: Float { get set }

    @objc optional func tableViewDidStartLongPress(gestureRecognizer: UILongPressGestureRecognizer)
    @objc optional func tableViewDidEndLongPress(gestureRecognizer: UILongPressGestureRecognizer)
    @objc optional func transformForSnapshotOfReorderingCell(atIndexPath indexPath: IndexPath) -> CATransform3D
}

First thing you need to do is assign your delegate object to reorderDelegate property. Below is example usage:

var tableViewCanReorder: true //you can modify this value at runtime.
var snapshotOpacity = 0.7 //you can modify this value at runtime
@IBOutlet var tableView: BSTableViewReorder!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.reorderDelegate = self
}

func transformForSnapshotOfReorderingCellAtIndexPath(indexPath: NSIndexPath) -> CATransform3D {
    var transform = CATransform3DIdentity
    transform.m34 = CGFloat(1.0 / -1000)

    transform = CATransform3DRotate(transform, CGFloat(20*M_PI / 180), 0, 1, 0)
    transform = CATransform3DRotate(transform, CGFloat(-15*M_PI / 180), 1, 0, 0)
    transform = CATransform3DTranslate(transform, -20, 0, 100)

    return transform
}

Author

Bartłomiej Semańczyk, [email protected]

License

BSTableViewReorder is available under the MIT license. See the LICENSE file for more info.