UITableView中的UIPickerView

Question

First of all: I know that some people already posted topics like that, but nobody gave a clear answer in all those topics.

I have a settings-UITableView in my application. Now i want to add a TableViewCell where i can choose between some numbers with a UIPickerView.

In the tableView didSelectRowAtIndexPath method i created the if statement for the right cell

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    if (indexPath.row == 1){

    }
}

How can i add a UIPickerView for this cell? It should slide up from the bottom and it would be nice if there is something like a "done" button.

Answer 1

Have you seen the sample program released with iOS 7 called DateCell ? It uses a UIDatePicker, but I found it pretty straightforward to adapt it to a regular UIPickerView.

It does exactly what you're describing: edit a UITableViewCell with a picker that opens directly under the row you're editing.

Answer 2

This is also based on your other question, so I am including those functionalities here as well (ie the switch).

In your YourTableViewController.h

set:

@interface YourTableViewViewController : UITableViewController <UIPickerViewDataSource, UIPickerViewDelegate>

In your YourTableViewController.m

Paste this code:

@interface YourTableViewViewController ()
@property NSInteger toggle;
@property (strong, nonatomic) UIPickerView *pickerView;
@end

@implementation YourTableViewViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.toggle = 0;
    self.pickerView = [[UIPickerView alloc] initWithFrame:(CGRect){{0, 0}, 320, 480}];
    self.pickerView.delegate = self;
    self.pickerView.dataSource = self;
    self.pickerView.center = (CGPoint){160, 640};
    self.pickerView.hidden = YES;
    [self.view addSubview:self.pickerView];
}

#pragma mark - Table view data source

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return 2;    
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if(cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    if(indexPath.row == 0)
    {
        [cell.contentView addSubview:self.mySwitch];
    }
    if(indexPath.row == 1)
    {
        cell.textLabel.textColor = [UIColor darkGrayColor];
        if(self.toggle == 0)
        {
            cell.textLabel.text = @"Choose a number";
        }
        else
        {
            cell.textLabel.text = @"Cancel";
        }
    }
    // Configure the cell...

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(indexPath.row == 1)
    {
        if(self.toggle == 0)
        {
            self.toggle = 1;
            [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:YES];
            [self bringUpPickerViewWithRow:indexPath];
        }
        else
        {
            self.toggle = 0;
            [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:YES];
            [self hidePickerView];
        }
    }
}

- (void)bringUpPickerViewWithRow:(NSIndexPath*)indexPath
{
    UITableViewCell *currentCellSelected = [self.tableView cellForRowAtIndexPath:indexPath];
    [UIView animateWithDuration:1.0f
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^
                     {
                         self.pickerView.hidden = NO;
                         self.pickerView.center = (CGPoint){currentCellSelected.frame.size.width/2, self.tableView.frame.origin.y + currentCellSelected.frame.size.height*4};
                     }
                     completion:nil];
}

- (void)hidePickerView
{
    [UIView animateWithDuration:1.0f
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^
     {
         self.pickerView.center = (CGPoint){160, 800};
     }
                     completion:^(BOOL finished)
     {
         self.pickerView.hidden = YES;
     }];
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    self.toggle = 0;
    [self.tableView reloadData];
    [self hidePickerView];
    NSLog(@"row selected:%ld", (long)row);
}

- (NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [NSString stringWithFormat:@"%d", row+1];
}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return 10;
}

@end

Tested.

Addendum:

Also, in your storyboard , change the separator for YourTableView to None (looks better in your case here).

Table View Separator:

in viewDidLoad , add:

self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;

And in bringUpPickerViewWithRow

after:

UITableViewCell *currentCellSelected = [self.tableView cellForRowAtIndexPath:indexPath];

add:

self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
[self.tableView setNeedsDisplay];

And lastly, in hidePickerView , add:

self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
[self.tableView setNeedsDisplay];

Answer 3

1. Create custom ViewController that include UIPickerView and Done button.
2. Add it as subview on your tableview. (Place it bottom so that it does not visible).
3. Once user click appropriate cell, you can animate picker-view from bottom.
4. Once user select an item animate and position it to bottom.

I have done above steps for same purpose. If you want I can send custom controller that include UIPickerView and done button.