问题
I'm trying to replicate the same technique that Apple uses in their mail app for marking mail as unread or "Mark as Unread" when you swipe from left to right inside a mailbox.
I've found similar solutions but only for a gesture of swiping from right to left. I was hoping that this same solution was available as part of the Apple SDK for the opposite direction.
How can I acheive the same left-to-right gesture effect as iOS' Mail app does?
回答1:
I've found similar solutions but only for a gesture of swiping from right to left.
SWTableViewCell has all the options you might want.
While dequeing a cell just set up left/right set of buttons as needed.
cell.leftUtilityButtons = [self leftButtons];
cell.rightUtilityButtons = [self rightButtons];
cell.delegate = self;
And by setting the view controller as its delegate, you can listen to the button clicks. Full details on how to implement are in that link
Ex 1:
Ex 2:
In case you are looking for buttons stacked vertically check out this.
回答2:
I usually implement it at the table level.
- (void)viewDidLoad
{
[super viewDidLoad];
UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self
action:@selector(leftSwipe:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];
[self.tableView addGestureRecognizer:recognizer];
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self
action:@selector(rightSwipe:)];
recognizer.delegate = self;
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
[self.tableView addGestureRecognizer:recognizer];
}
You then have control of the direction and can customize at will
- (void)leftSwipe:(UISwipeGestureRecognizer *)gestureRecognizer
{
//do you left swipe stuff here.
}
- (void)rightSwipe:(UISwipeGestureRecognizer *)gestureRecognizer
{
//do you right swipe stuff here. Something usually using theindexPath that you get that way
CGPoint location = [gestureRecognizer locationInView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
}
Credit goes to Jade Mind
回答3:
The accepted answer in the link you've provided is for both swipes directions.
Notice that gestureRecognizer.direction returns YES both for UISwipeGestureRecognizerDirectionLeft and UISwipeGestureRecognizerDirectionRight.
You'll just need to modify a couple of things:
Change the selector that get's called upon swiping, so it'll call your method, instead of the one in the post's example,
And change the direction of the swipe to be from left to right only, and not for both directions as it currently is, since, as I understand, you are trying to set a one-direction swipe.
So your code should look like this:
// In cellForRowAtIndexPath:, where you create your custom cell
cell.tableView=tableView;
cell.indexPath=indexPath;
UISwipeGestureRecognizer *swipeGestureRecognizer=[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(YOUR_METHOD_GOES_HERE)];
[cell addGestureRecognizer:swipeGestureRecognizer];
.
-(BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if([[gestureRecognizer view] isKindOfClass:[UITableViewCell class]] && ((UISwipeGestureRecognizer*)gestureRecognizer.direction==UISwipeGestureRecognizerDirectionRight)
return YES;
}
Note that you could also use the answer below the accepted answer, and just modify the gesture recogniser direction property to be UISwipeGestureRecognizerDirectionRight, instead of the current direction in the example, which is UISwipeGestureRecognizerDirectionLeft.
If you choose to implement this, your viewController must implement the gesture recogniser delegate, and your code should look like this:
// Call this method in viewDidLoad
- (void)setUpLeftSwipe {
UISwipeGestureRecognizer *recognizer;
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self
action:@selector(swipeRightt:)];
[recognizer setDirection:UISwipeGestureRecognizerDirectionRight];
[self.tableView addGestureRecognizer:recognizer];
recognizer.delegate = self;
}
- (void)swipeRight:(UISwipeGestureRecognizer *)gestureRecognizer {
CGPoint location = [gestureRecognizer locationInView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
... do something with cell now that i have the indexpath, maybe save the world? ...
}
Note- if I'm not mistaken, you'll need to create the cell swiping animation yourself, as, I believe, Xcode's default cell animation is only when swiping left.
Credit goes to MadhavanRP and Julian from the link you've provided. I just modified their answers to suite better to your needs.
I haven't tried and implemented this myself though.
回答4:
Use your custom TableViewCell with scrollview as given below :
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 80;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 120;
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
return header_view;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [array_field1 count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Schedule_cell";
Custom_Schedule_Cell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = (Custom_Schedule_Cell *)[Custom_Schedule_Cell cellFromNibNamed:@"Custom_Schedule_Cell"];
}
x = 0;
UILabel *lbl_title =[[UILabel alloc] initWithFrame:CGRectMake(x,0,cell.scroll_view.frame.size.width,cell.scroll_view.frame.size.height)];
lbl_title.text=@"Title Array";
[lbl_title setTextAlignment:NSTextAlignmentCenter];
[lbl_title setFont:[UIFont fontWithName:@"Raleway" size:18.0f]];
x += lbl_title.frame.size.width+10;
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x,0,110,cell.scroll_view.frame.size.height)];
[button setTitle:@"Button1" forState:UIControlStateNormal];
[button setBackgroundColor:[UIColor grayColor]];
[button addTarget:self action:@selector(button1:) forControlEvents:UIControlEventTouchDown];
button.tag = indexPath.row;
[button.titleLabel setTextAlignment:NSTextAlignmentCenter];
[button.titleLabel setFont:[UIFont fontWithName:@"Raleway" size:14.0f]];
x += button.frame.size.width+5;
UIButton *button2 = [[UIButton alloc] initWithFrame:CGRectMake(x,0,110,cell.scroll_view.frame.size.height)];
[button2 setTitle:@"Button2" forState:UIControlStateNormal];
[button2 setBackgroundColor:[UIColor grayColor]];
[button2 addTarget:self action:@selector(button2:) forControlEvents:UIControlEventTouchDown];
button2.tag = indexPath.row;
[button2.titleLabel setTextAlignment:NSTextAlignmentCenter];
[button2.titleLabel setFont:[UIFont fontWithName:@"Raleway" size:14.0f]];
x += button2.frame.size.width+5;
UIButton *button3 = [[UIButton alloc] initWithFrame:CGRectMake(x,0,110,cell.scroll_view.frame.size.height)];
[button3 setTitle:@"Button3" forState:UIControlStateNormal];
[button3 setBackgroundColor:[UIColor grayColor]];
[button3 addTarget:self action:@selector(button3:) forControlEvents:UIControlEventTouchDown];
button3.tag = indexPath.row;
[button3.titleLabel setTextAlignment:NSTextAlignmentCenter];
[button3.titleLabel setFont:[UIFont fontWithName:@"Raleway" size:14.0f]];
[cell.scroll_view addSubview:lbl_title];
[cell.scroll_view addSubview:button];
[cell.scroll_view addSubview:button2];
[cell.scroll_view addSubview:button3];
x += button3.frame.size.width+5;
cell.scroll_view.contentSize = CGSizeMake(x,cell.scroll_view.frame.size.height);
cell.scroll_view.showsHorizontalScrollIndicator = NO;
cell.scroll_view.showsVerticalScrollIndicator = NO;
[cell.scroll_view setContentOffset:CGPointMake(0,0) animated:NO];
[cell.scroll_view setPagingEnabled:true];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Custom_Schedule_Cell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
// [selectedCell.scroll_view setContentOffset:CGPointMake(x2,0) animated:NO];
}
-(void)button1:(UIButton *)button
{
NSLog(@“button1 Click ");
[button setBackgroundColor:[UIColor redColor]];
}
-(void)button2:(UIButton *)button
{
NSLog(@“button2 Click");
[button setBackgroundColor:[UIColor greenColor]];
}
-(void)button3:(UIButton *)button
{
NSLog(@“button Click");
[button setBackgroundColor:[UIColor redColor]];
}
来源：https://stackoverflow.com/questions/26955285/how-to-implement-swipe-left-to-right-in-uitableview-cell-similar-to-ios-mail