UITableView粘在iOS8中

Question

I have a UITableView in an app that you can use your finger to scroll up and down. Users who have updated to iOS8 who tell me it is now sticking and it does not scroll up or down. It appears to be random. Sometimes it works, other times it does not. By moving to a different view and returning sometimes unlocks it.

The UITableView is populated with an array of UIButtons (one example shown below). It works perfectly in iOS7. Is there something that has changed min iOS8 that I am unaware of?

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
if (cell ==nil)
{
    cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}

/* this is man example of a button being established. 5 buttons are actually made*/

UIButton* button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button1 setFrame:CGRectMake(0,0,160, 160)];
[button1 setBackgroundImage:[UIImage imageNamed:@"Button1.png"] forState:UIControlStateNormal];
[button1 setTitleColor:[UIColor colorWithRed:19/255.0f green:73/255.0f blue:17/255.0f alpha:1] forState:UIControlStateNormal];
button1.titleLabel.font = [UIFont fontWithName:@"arial" size:24];
button1.titleLabel.textAlignment = NSTextAlignmentCenter;
button1.titleLabel.lineBreakMode = NSLineBreakByCharWrapping;
[button1 addTarget:self action:@selector(action1:) forControlEvents:UIControlEventTouchUpInside];
[button1 setTitle:@"Menu" forState:UIControlStateNormal];

/* the buttons are stored into an array*/

NSMutableArray *array = [[NSMutableArray alloc] init];
[array addObject:button1];
/*other buttons added to the array*/


[cell addSubview:[array objectAtIndex:indexPath.row]];

return cell;

Answer 1

There are 2 possible things:

• Better to use cell.contentView to add subviews
• You always add subviews to the existing cells without removing the previous added

Answer 2

UIButton s in scroll views can cause issues with scrolling.

Try tableView.canCancelContentTouches = YES;

If that doesn't help try to additionally subclass UITableView , overwrite touchesShouldCancelInContentView: and return YES there.

Answer 3

Try using TapGesture instead of button. I met the same problem and finally TapGesture solved the problem.

In iOS8,when you put a button on a cell,if the button is not big enough and you try to scroll the tableView while your finger is within the area of the button,the tableView will simply not scroll. PS: You can try make the button smaller,and drag outside of the button,you will find it scrolls just as you wish.