如何解决在未处于编辑模式下时如何对UITableView上的控件重新排序？
| 我有一个UITableView，并且我希望在不处于编辑模式时能够对行进行重新排序，这意味着我不希望看到删除图标，直到按Edit为止。我希望能够一直查看和使用重新排序控件。那可能吗？ 我是否必须一直保持UITableView处于编辑模式，并手动启用/禁用删除图标？在这种情况下，如何禁用滑动删除功能？解决方法
据我所知，您不能仅使用编辑标志来做到这一点。但是，要达到类似的效果并不难。
有自己的布尔值，即
deleting
– tableView:editingStyleForRowAtIndexPath:
deleting == YES
UITableViewCellEditingStyleDelete
UITableViewCellEditingStyleNone
tableView.editing = YES
deleting
[tableView beginUpdates]
[tableView endUpdates]
UITableViewCell
UITableViewCell
UITableView
UITableView
UITableViewCell
class ReorderTableViewCell: UITableViewCell {
override var showsReorderControl: Bool {
get {
return true // short-circuit to on
}
set { }
}
override func setEditing(editing: Bool,animated: Bool) {
if editing == false {
return // ignore any attempts to turn it off
}
super.setEditing(editing,animated: animated)
}
}
override func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(\"Cell\",forIndexPath: indexPath)
// Configure the cell...
:
cell.editing = self.tableView(tableView,canMoveRowAtIndexPath: indexPath) // conditionally enable reordering
return cell
}
allowsMultipleSelectionDuringEditing
override func setEditing(editing: Bool,animated: Bool) {
super.setEditing(editing,animated: animated)
self.tableView.allowsMultipleSelectionDuringEditing = editing // enable only during actual editing to avoid cosmetic problem
}
-viewDidLoad
allowsMultipleSelectionDuringEditing
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
return UITableViewCellEditingStyleNone;
}
- (BOOL)tableView:(UITableView *)tableview shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath {
return NO;
}
- (BOOL)tableView:(UITableView *)tableview canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
class MyTableViewCell: UITableViewCell {
override func setEditing(_ editing: Bool,animated: Bool) {
super.setEditing(editing,animated: animated)
setupAccessoryView()
}
func setupAccessoryView() {
if accessoryView == nil {
if let reorderCtrl = subviews.first(where: { (subView) -> Bool in
subView.description.contains(\"Reorder\")
}) {
accessoryView = reorderCtrl
}
}
}
}
class MyTableViewController: UITableViewController,NSFetchedResultsControllerDelegate {
var frc: NSFetchedResultsController<MyRow>!
override func viewDidLoad() {
super.viewDidLoad()
do {
// Setup the NSFetchedResultsController here
try frc.performFetch()
setEditing(true,animated: false) // Enable for cell reorder control creation on first load
} catch {
print(error)
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
setEditing(false,animated: false)
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
setEditing(true,animated: false) // Enable for cell reorder control creation when managed object is updated or inserted on other view
}
// MARK: - Table view data source
override func tableView(_ tableView: UITableView,commit editingStyle: UITableViewCellEditingStyle,forRowAt indexPath: IndexPath) {
// your data source update here for swipe to delete
}
override func tableView(_ tableView: UITableView,moveRowAt sourceIndexPath: IndexPath,to destinationIndexPath: IndexPath) {
// your data source update here for sort property value change
}
}
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