我的問題是，這是否可行？如果是，您將如何處理此任務？ipad：從一個UITableViewController中拖出一個UITableViewCell並將其放入另一個
有誰知道已經在使用此功能的應用程序，或者在哪裏獲取一些示例代碼？
另外，如果我要在沒有太多的主題知識的情況下自行實現這個功能，那麼對於完成它需要多長時間，您會做出什麼估計？
另一件要提及的事情，因爲它可能使事情變得更加複雜：目標表在默認情況下處於editmode狀態，以便用戶可以重新排列單元格（使用附件視圖中的標準重新排序控件）掉在那裏。
編輯：
我只是試圖包括概念圖像的截圖在我的崗位。圖像左側顯示一張桌面，右側顯示灰色的下落區域。我的客戶說他也在其他應用程序上看到過，所以必須有某種我不知道的UI元素。
我還沒有在開發者資源庫中找到任何關於這種放置區域的內容，所以希望你們中的一位能夠給我指示或清理一下。
好吧，我自己實現了這一點，我對結果很滿意。您可以將單元格從左側（源表格）拖動到右側（目標表格），並拖動目標表格中的單元格進行重新編碼。如果您嘗試從右向左拖動一個單元格，它將被重新插入到開始拖動的位置（因此沒有任何反應）。目標表也支持刪除單元格，源表格則不支持。因此，這裏的完整代碼：
UIDropTableViewController.h
#import <UIKit/UIKit.h>
@interface UIDropTableViewController : UIViewController <UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate>
{
UINavigationItem* srcTableNavItem;
UINavigationItem* dstTableNavItem;
UITableView* srcTableView;
UITableView* dstTableView;
UITableViewCell* draggedCell;
UIView* dropArea;
NSMutableArray* srcData;
NSMutableArray* dstData;
id draggedData;
BOOL dragFromSource; // used for reodering
NSIndexPath* pathFromDstTable; // used to reinsert data when reodering fails
}
@property (nonatomic, readonly) NSArray* srcData;
@property (nonatomic, readonly) NSArray* dstData;
- (id)initWithFrame:(CGRect)frame SourceData:(NSArray*)sourceData DestinationData:(NSArray*)destinationData;
- (void)setSrcTableTitle:(NSString*)title;
- (void)setDstTableTitle:(NSString*)title;
@end
UIDropTableViewController.m
#import "UIDropTableViewController.h"
#define kCellIdentifier @"DropTableCell"
#define kCellHeight 44
#define kNavBarHeight 30
// forward declaration of private helper methods
@interface UIDropTableViewController()
- (void)setupSourceTableWithFrame:(CGRect)frame;
- (void)setupDestinationTableWithFrame:(CGRect)frame;
- (void)initDraggedCellWithCell:(UITableViewCell*)cell AtPoint:(CGPoint)point;
- (void)startDragging:(UIPanGestureRecognizer *)gestureRecognizer;
- (void)startDraggingFromSrcAtPoint:(CGPoint)point;
- (void)startDraggingFromDstAtPoint:(CGPoint)point;
- (void)doDrag:(UIPanGestureRecognizer *)gestureRecognizer;
- (void)stopDragging:(UIPanGestureRecognizer *)gestureRecognizer;
- (UITableViewCell*)srcTableCellForRowAtIndexPath:(NSIndexPath*)indexPath;
- (UITableViewCell*)dstTableCellForRowAtIndexPath:(NSIndexPath*)indexPath;
@end
@implementation UIDropTableViewController
@synthesize srcData, dstData;
#pragma mark -
#pragma mark Public Methods
- (void)setSrcTableTitle:(NSString*)title
{
srcTableNavItem.title = title;
}
- (void)setDstTableTitle:(NSString*)title
{
dstTableNavItem.title = title;
}
#pragma mark -
#pragma mark UIViewController
- (id)initWithFrame:(CGRect)frame SourceData:(NSArray*)sourceData DestinationData:(NSArray*)destinationData
{
self = [super init];
if (self)
{
self.view.clipsToBounds = YES;
self.view.frame = frame;
int width = frame.size.width;
int height = frame.size.height;
// set up data
srcData = [[NSMutableArray alloc] initWithArray:sourceData];
dstData = [[NSMutableArray alloc] initWithArray:destinationData];
draggedCell = nil;
draggedData = nil;
pathFromDstTable = nil;
// set up views
[self setupSourceTableWithFrame:CGRectMake(0, 0, width/2, height)];
[self setupDestinationTableWithFrame:CGRectMake(width/2, 0, width/2, height)];
UIView* separator = [[UIView alloc] initWithFrame:CGRectMake(width/2, 0, 1, height)];
separator.backgroundColor = [UIColor blackColor];
[self.view addSubview:separator];
[separator release];
// set up gestures
UIPanGestureRecognizer* panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanning:)];
[self.view addGestureRecognizer:panGesture];
[panGesture release];
}
return self;
}
- (void)dealloc
{
[srcTableNavItem release];
[dstTableNavItem release];
[srcTableView release];
[dstTableView release];
[dropArea release];
[srcData release];
[dstData release];
if(draggedCell != nil)
[draggedCell release];
if(draggedData != nil)
[draggedData release];
if(pathFromDstTable != nil)
[pathFromDstTable release];
[super dealloc];
}
- (void)viewWillAppear:(BOOL)animated
{
[srcTableView reloadData];
[dstTableView reloadData];
[UIView animateWithDuration:0.2 animations:^
{
CGRect frame = dstTableView.frame;
frame.size.height = kCellHeight * [dstData count];
dstTableView.frame = frame;
}];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return UIInterfaceOrientationIsLandscape(interfaceOrientation);
}
#pragma mark -
#pragma mark Helper methods for initialization
- (void)setupSourceTableWithFrame:(CGRect)frame
{
srcTableNavItem = [[UINavigationItem alloc] init];
srcTableNavItem.title = @"Source Table";
CGRect navBarFrame = frame;
navBarFrame.size.height = kNavBarHeight;
UINavigationBar* navigationBar = [[UINavigationBar alloc] initWithFrame:navBarFrame];
[navigationBar pushNavigationItem:srcTableNavItem animated:false];
[navigationBar setTintColor:[UIColor lightGrayColor]];
[self.view addSubview:navigationBar];
[navigationBar release];
CGRect tableFrame = frame;
tableFrame.origin.y = kNavBarHeight;
tableFrame.size.height -= kNavBarHeight;
srcTableView = [[UITableView alloc] initWithFrame:tableFrame];
[srcTableView setDelegate:self];
[srcTableView setDataSource:self];
[self.view addSubview:srcTableView];
}
- (void)setupDestinationTableWithFrame:(CGRect)frame
{
dstTableNavItem = [[UINavigationItem alloc] init];
dstTableNavItem.title = @"Destination Table";
CGRect navBarFrame = frame;
navBarFrame.size.height = kNavBarHeight;
UINavigationBar* navigationBar = [[UINavigationBar alloc] initWithFrame:navBarFrame];
[navigationBar pushNavigationItem:dstTableNavItem animated:false];
[navigationBar setTintColor:[UIColor lightGrayColor]];
[self.view addSubview:navigationBar];
[navigationBar release];
CGRect dropAreaFrame = frame;
dropAreaFrame.origin.y = kNavBarHeight;
dropAreaFrame.size.height -= kNavBarHeight;
dropArea = [[UIView alloc] initWithFrame:dropAreaFrame];
[dropArea setBackgroundColor:[UIColor grayColor]];
[self.view addSubview:dropArea];
CGRect contentFrame = dropAreaFrame;
contentFrame.origin = CGPointMake(0, 0);
UILabel* dropAreaLabel = [[UILabel alloc] initWithFrame:contentFrame];
dropAreaLabel.backgroundColor = [UIColor clearColor];
dropAreaLabel.font = [UIFont boldSystemFontOfSize:12];
dropAreaLabel.textAlignment = UITextAlignmentCenter;
dropAreaLabel.textColor = [UIColor whiteColor];
dropAreaLabel.text = @"Drop items here...";
[dropArea addSubview:dropAreaLabel];
[dropAreaLabel release];
CGRect tableFrame = contentFrame;
tableFrame.size.height = kCellHeight * [dstData count];
dstTableView = [[UITableView alloc] initWithFrame:tableFrame];
[dstTableView setEditing:YES];
[dstTableView setDelegate:self];
[dstTableView setDataSource:self];
[dropArea addSubview:dstTableView];
}
- (void)initDraggedCellWithCell:(UITableViewCell*)cell AtPoint:(CGPoint)point
{
// get rid of old cell, if it wasn't disposed already
if(draggedCell != nil)
{
[draggedCell removeFromSuperview];
[draggedCell release];
draggedCell = nil;
}
CGRect frame = CGRectMake(point.x, point.y, cell.frame.size.width, cell.frame.size.height);
draggedCell = [[UITableViewCell alloc] init];
draggedCell.selectionStyle = UITableViewCellSelectionStyleGray;
draggedCell.textLabel.text = cell.textLabel.text;
draggedCell.textLabel.textColor = cell.textLabel.textColor;
draggedCell.highlighted = YES;
draggedCell.frame = frame;
draggedCell.alpha = 0.8;
[self.view addSubview:draggedCell];
}
#pragma mark -
#pragma mark UIGestureRecognizer
- (void)handlePanning:(UIPanGestureRecognizer *)gestureRecognizer
{
switch ([gestureRecognizer state]) {
case UIGestureRecognizerStateBegan:
[self startDragging:gestureRecognizer];
break;
case UIGestureRecognizerStateChanged:
[self doDrag:gestureRecognizer];
break;
case UIGestureRecognizerStateEnded:
case UIGestureRecognizerStateCancelled:
case UIGestureRecognizerStateFailed:
[self stopDragging:gestureRecognizer];
break;
default:
break;
}
}
#pragma mark -
#pragma mark Helper methods for dragging
- (void)startDragging:(UIPanGestureRecognizer *)gestureRecognizer
{
CGPoint pointInSrc = [gestureRecognizer locationInView:srcTableView];
CGPoint pointInDst = [gestureRecognizer locationInView:dstTableView];
if([srcTableView pointInside:pointInSrc withEvent:nil])
{
[self startDraggingFromSrcAtPoint:pointInSrc];
dragFromSource = YES;
}
else if([dstTableView pointInside:pointInDst withEvent:nil])
{
[self startDraggingFromDstAtPoint:pointInDst];
dragFromSource = NO;
}
}
- (void)startDraggingFromSrcAtPoint:(CGPoint)point
{
NSIndexPath* indexPath = [srcTableView indexPathForRowAtPoint:point];
UITableViewCell* cell = [srcTableView cellForRowAtIndexPath:indexPath];
if(cell != nil)
{
CGPoint origin = cell.frame.origin;
origin.x += srcTableView.frame.origin.x;
origin.y += srcTableView.frame.origin.y;
[self initDraggedCellWithCell:cell AtPoint:origin];
cell.highlighted = NO;
if(draggedData != nil)
{
[draggedData release];
draggedData = nil;
}
draggedData = [[srcData objectAtIndex:indexPath.row] retain];
}
}
- (void)startDraggingFromDstAtPoint:(CGPoint)point
{
NSIndexPath* indexPath = [dstTableView indexPathForRowAtPoint:point];
UITableViewCell* cell = [dstTableView cellForRowAtIndexPath:indexPath];
if(cell != nil)
{
CGPoint origin = cell.frame.origin;
origin.x += dropArea.frame.origin.x;
origin.y += dropArea.frame.origin.y;
[self initDraggedCellWithCell:cell AtPoint:origin];
cell.highlighted = NO;
if(draggedData != nil)
{
[draggedData release];
draggedData = nil;
}
draggedData = [[dstData objectAtIndex:indexPath.row] retain];
// remove old cell
[dstData removeObjectAtIndex:indexPath.row];
[dstTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationMiddle];
pathFromDstTable = [indexPath retain];
[UIView animateWithDuration:0.2 animations:^
{
CGRect frame = dstTableView.frame;
frame.size.height = kCellHeight * [dstData count];
dstTableView.frame = frame;
}];
}
}
- (void)doDrag:(UIPanGestureRecognizer *)gestureRecognizer
{
if(draggedCell != nil && draggedData != nil)
{
CGPoint translation = [gestureRecognizer translationInView:[draggedCell superview]];
[draggedCell setCenter:CGPointMake([draggedCell center].x + translation.x,
[draggedCell center].y + translation.y)];
[gestureRecognizer setTranslation:CGPointZero inView:[draggedCell superview]];
}
}
- (void)stopDragging:(UIPanGestureRecognizer *)gestureRecognizer
{
if(draggedCell != nil && draggedData != nil)
{
if([gestureRecognizer state] == UIGestureRecognizerStateEnded
&& [dropArea pointInside:[gestureRecognizer locationInView:dropArea] withEvent:nil])
{
NSIndexPath* indexPath = [dstTableView indexPathForRowAtPoint:[gestureRecognizer locationInView:dstTableView]];
if(indexPath != nil)
{
[dstData insertObject:draggedData atIndex:indexPath.row];
[dstTableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationMiddle];
}
else
{
[dstData addObject:draggedData];
[dstTableView reloadData];
}
}
else if(!dragFromSource && pathFromDstTable != nil)
{
// insert cell back where it came from
[dstData insertObject:draggedData atIndex:pathFromDstTable.row];
[dstTableView insertRowsAtIndexPaths:[NSArray arrayWithObject:pathFromDstTable] withRowAnimation:UITableViewRowAnimationMiddle];
[pathFromDstTable release];
pathFromDstTable = nil;
}
[UIView animateWithDuration:0.3 animations:^
{
CGRect frame = dstTableView.frame;
frame.size.height = kCellHeight * [dstData count];
dstTableView.frame = frame;
}];
[draggedCell removeFromSuperview];
[draggedCell release];
draggedCell = nil;
[draggedData release];
draggedData = nil;
}
}
#pragma mark -
#pragma mark UITableViewDataSource
- (BOOL)tableView:(UITableView*)tableView canMoveRowAtIndexPath:(NSIndexPath*)indexPath
{
// disable build in reodering functionality
return NO;
}
- (void)tableView:(UITableView*)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
// enable cell deletion for destination table
if([tableView isEqual:dstTableView] && editingStyle == UITableViewCellEditingStyleDelete)
{
[dstData removeObjectAtIndex:indexPath.row];
[dstTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[UIView animateWithDuration:0.2 animations:^
{
CGRect frame = dstTableView.frame;
frame.size.height = kCellHeight * [dstData count];
dstTableView.frame = frame;
}];
}
}
- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
// tell our tables how many rows they will have
int count = 0;
if([tableView isEqual:srcTableView])
{
count = [srcData count];
}
else if([tableView isEqual:dstTableView])
{
count = [dstData count];
}
return count;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return kCellHeight;
}
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell* result = nil;
if([tableView isEqual:srcTableView])
{
result = [self srcTableCellForRowAtIndexPath:indexPath];
}
else if([tableView isEqual:dstTableView])
{
result = [self dstTableCellForRowAtIndexPath:indexPath];
}
return result;
}
#pragma mark -
#pragma mark Helper methods for table stuff
- (UITableViewCell*)srcTableCellForRowAtIndexPath:(NSIndexPath*)indexPath
{
// tell our source table what kind of cell to use and its title for the given row
UITableViewCell *cell = [srcTableView dequeueReusableCellWithIdentifier:kCellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:kCellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.textColor = [UIColor darkGrayColor];
}
cell.textLabel.text = [[srcData objectAtIndex:indexPath.row] description];
return cell;
}
- (UITableViewCell*)dstTableCellForRowAtIndexPath:(NSIndexPath*)indexPath
{
// tell our destination table what kind of cell to use and its title for the given row
UITableViewCell *cell = [dstTableView dequeueReusableCellWithIdentifier:kCellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:kCellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.textColor = [UIColor darkGrayColor];
}
cell.textLabel.text = [[dstData objectAtIndex:indexPath.row] description];
return cell;
}
@end
下面是如何使用它的一個例子：
NSArray* srcData = [NSArray arrayWithObjects:@"item0", @"item1", @"item2", @"item3", @"item4", nil];
NSArray* dstData = [NSArray arrayWithObjects:@"item5", @"item6", nil];
dropTable = [[UIDropTableViewController alloc] initWithFrame:CGRectMake(100, 100, 600, 500) SourceData:srcData DestinationData:dstData];
[dropTable setSrcTableTitle:@"Bla"];
[dropTable setDstTableTitle:@"Blub"];
[[dropTable.view layer] setBorderColor:[[UIColor darkGrayColor] CGColor]];
[[dropTable.view layer] setBorderWidth:1];
[[dropTable.view layer] setCornerRadius:2];
[self.view addSubview:dropTable.view];
接着，在你完成編輯你剛剛閱讀dropTable.dstData並繼續使用它的前夕你想做什麼。
在UIDropTableViewController.m你可能想調整initDraggedCellWithCell,srcTableCellForRowAtIndexPath和dstTableCellForRowAtIndexPath爲你自己的需要，只要細胞表示去。
我只需要解決類似的問題。這是一個鏈接到github上編譯和運行的例子。
https://github.com/luminixinc/UITableViewDragAndDropExample.git
享受。
您可能已經知道了這一點，並且/或者忘記了它，但是這對於想要知道如何做到這一點並且遇到此stackoverflow頁面的任何人來說都是如此。
沒有故事板和沒有ARC的一個例子：https://github.com/josh2112/iPad-UITableView-DnD-Demo
與分鏡，並與ARC一個例子：https://github.com/erikthiem/TestDragAndDropStoryboardARC
我知道這是一個非常古老的問題，但我最近實施的代碼christoph gave in his answer在一個簡單的觀點輔助類 - 想這可能是有用的：
它同時支持UITableViews和UICollectionViews作爲來源和目的地。
UPDATE
我剛剛意識到上述庫的版本2：BetweenKit。它建立在原始概念的基礎上，但支持多種新功能，如多個目標集合，自定義渲染等等。希望能幫助到你 ！
上面的christoph代碼和Tom K的全功能示例項目都是對我的說明。
Tom K功能示例中的一個小問題點： https://github.com/luminixinc/UITableViewDragAndDropExample.git 從故事板實例化的「UserDetailViewController」中的IBOutlet已損壞。
針對此 storyboard instantiateViewControllerWithIdentifier not setting IBOutlets
檢查解決辦法了這一點：https://github.com/Ice3SteveFortune/i3-dragndrop – sf13579