iOS 7 - How to display a date picker in place in a

Question

In WWDC 2013 video, Apple suggests displaying picker in place in a table view in iOS 7. How to insert and animate a view between table view cells?

Like this, from the Apple calendar app:

Answer 1

Here is another way to solve the problem without static constant numbers. All the cells can be used in static and dynamic table views. This method uses single cell for both title and date picker!

Btw you can have as many date pickers in your table as you wish!

Create a UITableViewCell subclass:

All your table view cells have to be inherited from this class and you must set the cell height manually for every row.

//
//  CPTableViewCell.h
//
//  Copyright (c) CodePigeon. All rights reserved.
//

@class CPTableViewCell;

#define kUIAnimationDuration 0.33f

@protocol CPTableViewCellDelegate <NSObject>

@required
- (void)tableViewCellDidChangeValue:(CPTableViewCell *)cell;
@optional
- (void)tableViewCellDidBecomeFirstResponder:(CPTableViewCell *)cell;
- (void)tableViewCellResignedFirstResponder:(CPTableViewCell *)cell;
@end

@interface CPTableViewCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UITableView *tableView;
@property (nonatomic, weak) IBOutlet CPTableViewCell *nextCell;
@property (nonatomic, weak) IBOutlet id<CPTableViewCellDelegate> delegate;

@property (nonatomic, copy) IBInspectable NSString *dataBindKey;
@property (nonatomic) IBInspectable CGFloat height;

@property (nonatomic, readonly) BOOL isFirstResponder;
@property (nonatomic) BOOL isEnabled;

- (void)commonInit;

- (id)value;
- (void)setValue:(id)value;

@end

//
//  CPTableViewCell.m
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTableViewCell.h"

@interface CPTableViewCell ()
@end

@implementation CPTableViewCell

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];

    if (!self)
        return nil;

    [self commonInit];

    return self;
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];

    if (!self)
        return nil;

    [self commonInit];

    return self;
}

- (void)commonInit
{
    _isFirstResponder = NO;
    _isEnabled = YES;
}

- (BOOL)canBecomeFirstResponder
{
    return _isEnabled;
}

- (BOOL)becomeFirstResponder
{
    if ([_delegate respondsToSelector:@selector(tableViewCellDidBecomeFirstResponder:)])
        [_delegate tableViewCellDidBecomeFirstResponder:self];

    return _isFirstResponder = YES;
}

- (BOOL)resignFirstResponder
{
    if (_isFirstResponder)
    {
        if ([_delegate respondsToSelector:@selector(tableViewCellResignedFirstResponder:)])
            [_delegate tableViewCellResignedFirstResponder:self];

        _isFirstResponder = NO;
    }

    return _isFirstResponder;
}

- (id)value
{
    [self doesNotRecognizeSelector:_cmd];

    return nil;
}

- (void)setValue:(id)value
{
    [self doesNotRecognizeSelector:_cmd];
}

@end

Create a CPDatePickerTableViewCell class from our CPTableViewCell

//
//  CPDatePickerTableViewCell.h
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTableViewCell.h"

@interface CPDatePickerTableViewCell : CPTableViewCell

@property (nonatomic, copy) IBInspectable NSString *dateFormat;

@property (nonatomic, weak) IBOutlet UILabel *titleLabel;
@property (nonatomic, weak) IBOutlet UILabel *dateLabel;

@property (nonatomic, weak) IBOutlet UIDatePicker *datePicker;

@end

//
//  CPDatePickerTableViewCell.m
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPDatePickerTableViewCell.h"

#define kCPDatePickerTableViewCellPickerHeight 162.f

@interface CPDatePickerTableViewCell () <UITextFieldDelegate, UIPickerViewDelegate>
{
    NSDateFormatter *_dateFormatter;
    BOOL _isOpen;
}
@end

@implementation CPDatePickerTableViewCell

- (void)awakeFromNib
{
    [super awakeFromNib];

    _dateFormatter = [NSDateFormatter new];
    [_dateFormatter setDateFormat:_dateFormat];

    self.selectionStyle = UITableViewCellSelectionStyleNone;

    _dateLabel.text = [_dateFormatter stringFromDate:_datePicker.date];
    _datePicker.alpha = 0.f;
    _isOpen = NO;
}

- (BOOL)becomeFirstResponder
{
    if (_isOpen == NO)
    {
        self.height += kCPDatePickerTableViewCellPickerHeight;
    }
    else
    {
        self.height -= kCPDatePickerTableViewCellPickerHeight;
    }

    [UIView animateWithDuration:kUIAnimationDuration animations:^{
        _datePicker.alpha = _isOpen ? 0.0f : 1.0f;
    }];

    [self.tableView beginUpdates];
    [self.tableView endUpdates];

    _isOpen = !_isOpen;

    [self.tableView endEditing:YES];

    return [super becomeFirstResponder];
}

- (BOOL)resignFirstResponder
{
    if (_isOpen == YES)
    {
        self.height -= kCPDatePickerTableViewCellPickerHeight;

        [UIView animateWithDuration:kUIAnimationDuration animations:^{
            _datePicker.alpha = 0.0f;
        }];

        [self.tableView beginUpdates];
        [self.tableView endUpdates];

        _isOpen = NO;
    }

    return [super resignFirstResponder];
}

- (id)value
{
    return _datePicker.date;
}

- (void)setValue:(NSDate *)value
{
    _datePicker.date = value;
    _dateLabel.text = [_dateFormatter stringFromDate:_datePicker.date];
}

- (IBAction)datePickerValueChanged:(UIDatePicker *)sender
{
    [_dateLabel setText:[_dateFormatter stringFromDate:_datePicker.date]];

    [self.delegate tableViewCellDidChangeValue:self];
}

@end

In your view controller implement these two delegate methods

#pragma mark - UITableViewDelegate methods

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CPTableViewCell *cell = (CPTableViewCell *)[super tableView:tableView cellForRowAtIndexPath:indexPath];

    return [cell height];
}

- (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath
{
    CPTableViewCell *cell = (CPTableViewCell *)[tableView cellForRowAtIndexPath:indexPath];

    if ([cell canBecomeFirstResponder])
    {
        [cell becomeFirstResponder];
    }

    if (cell != _selectedCell)
    {
        [_selectedCell resignFirstResponder];
    }

    _selectedCell = cell;

    return YES;
}

Example how to set up constraints in Interface builder

Additionally I have written custom cell classes for UITextField and UITextView where tableView:didSelectRowAtIndexPath: is called when cell is selected!

CPTextFieldTableViewCell

//
//  CPTextFieldTableViewCell.h
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTableViewCell.h"

@interface CPTextFieldTableViewCell : CPTableViewCell

@property (nonatomic, weak) IBOutlet UITextField *inputTextField;

@end

//
//  CPTextFieldTableViewCell.m
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTextFieldTableViewCell.h"

@interface CPTextFieldTableViewCell () <UITextFieldDelegate>
@end

@implementation CPTextFieldTableViewCell

- (void)awakeFromNib
{
    [super awakeFromNib];

    self.selectionStyle = UITableViewCellSelectionStyleNone;

    _inputTextField.userInteractionEnabled = NO;
    _inputTextField.delegate = self;
}

- (BOOL)becomeFirstResponder
{
    _inputTextField.userInteractionEnabled = YES;

    [_inputTextField becomeFirstResponder];

    return [super becomeFirstResponder];
}

- (BOOL)resignFirstResponder
{
    _inputTextField.userInteractionEnabled = NO;

    return [super resignFirstResponder];
}

- (void)setIsEnabled:(BOOL)isEnabled
{
    [super setIsEnabled:isEnabled];

    _inputTextField.enabled = isEnabled;
}

- (id)value
{
    return _inputTextField.text;
}

- (void)setValue:(NSString *)value
{
    _inputTextField.text = value;
}

#pragma mark - UITextFieldDelegate methods

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    [self.delegate tableViewCellDidChangeValue:self];
}

@end

CBTextViewTableViewCell

Cell height is dynamic and row will grow when text is wrapped to new line!

//
//  CBTextViewTableViewCell.h
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTableViewCell.h"

@interface CPTextViewTableViewCell : CPTableViewCell

@property (nonatomic, weak) IBOutlet UITextView *inputTextView;

@end

//
//  CBTextViewTableViewCell.m
//
//  Copyright (c) CodePigeon. All rights reserved.
//

#import "CPTextViewTableViewCell.h"

@interface CPTextViewTableViewCell () <UITextViewDelegate>
{
    UITextView *_heightTextView;
}

@end

@implementation CPTextViewTableViewCell

@synthesize height = _height;

- (void)awakeFromNib
{
    [super awakeFromNib];

    self.selectionStyle = UITableViewCellSelectionStyleNone;

    _inputTextView.userInteractionEnabled = NO;
    _inputTextView.delegate = self;
    _inputTextView.contentInset = UIEdgeInsetsZero;
    _inputTextView.scrollEnabled = NO;
}

- (CGFloat)height
{
    if (!_heightTextView)
    {
        CGRect frame = (CGRect) {
            .origin = CGPointMake(0.f, 0.f),
            .size = CGSizeMake(_inputTextView.textInputView.frame.size.width, 0.f)
        };

        _heightTextView = [[UITextView alloc] initWithFrame:frame];
        _heightTextView.font = [UIFont systemFontOfSize:_inputTextView.font.pointSize];
        _heightTextView.textColor = UIColor.whiteColor;
        _heightTextView.contentInset = UIEdgeInsetsZero;
    }

    _heightTextView.text = _inputTextView.text;

    CGSize size = [_heightTextView sizeThatFits:CGSizeMake(_inputTextView.textInputView.frame.size.width, FLT_MAX)];

    return size.height > _height ? size.height + _inputTextView.font.pointSize : _height;
}

- (BOOL)becomeFirstResponder
{
    _inputTextView.userInteractionEnabled = YES;

    [_inputTextView becomeFirstResponder];

    return [super becomeFirstResponder];
}

- (BOOL)resignFirstResponder
{
    _inputTextView.userInteractionEnabled = NO;

    return [super resignFirstResponder];
}

- (void)setIsEnabled:(BOOL)isEnabled
{
    [super setIsEnabled:isEnabled];

    _inputTextView.editable = isEnabled;
}

- (id)value
{
    return _inputTextView.text;
}

- (void)setValue:(NSString *)value
{
    _inputTextView.text = value;

    [_inputTextView setNeedsLayout];
    [_inputTextView layoutIfNeeded];
}

#pragma mark - UITextViewDelegate methods

- (void)textViewDidChange:(UITextView *)textView
{
    [self.delegate tableViewCellDidChangeValue:self];

    [self.tableView beginUpdates];
    [self.tableView endUpdates];
}

@end

Answer 2

I have made my own custom view controller to simplify the process of adding an inline picker inline in a tableview. You just subclass it and follow some simple rules and it handles the date picker presentation.

You can find it here along with an example project that demonstrates how to use it: https://github.com/ale84/ALEInlineDatePickerViewController

Answer 3

The easiest way to use DateCell in Swift version: Use this example.

1. Open this example and test it(Make Xcode to Convert to Swift 2)

2. Drag "DateCellTableViewController.swift" class to your project.

3. Open "Main.storyboard" and Copy "DateCell" ViewController Object and past it in your storyboard.

Answer 4

One of the best tutorials about this is iOS 7 in-line UIDatePicker – Part 2. Basically here I use static table view cells and implement some additional methods. I used Xamarin and C# for this:

You have to active Clip Subviews.

Setting the height:

public override float GetHeightForRow (UITableView tableView, NSIndexPath indexPath)
{
    if (indexPath.Row == 4) {
        return (datePickerIsShowing) ? 206f : 0.0f;
    }

    return base.GetHeightForRow(tableView,indexPath);
}

Than a class variable: private bool datePickerIsShowing = false;

Show date picker:

private void showDatePickerCell(){
    datePickerIsShowing = true;
    this.TableView.BeginUpdates ();
    this.TableView.EndUpdates ();
    this.datePicker.Hidden = false;
    this.datePicker.Alpha = 0.0f;

    UIView.Animate (0.25, animation:
        () => {
            this.datePicker.Alpha = 1.0f;
        }
    );
} 

Hide date picker:

private void hideDatePickerCell(){
    datePickerIsShowing = false;
    this.TableView.BeginUpdates ();
    this.TableView.EndUpdates ();

    UIView.Animate (0.25,
        animation: () => {
            this.datePicker.Alpha = 0.0f;
        },
        completion: () => {
            this.datePicker.Hidden = true;
        }
    );
} 

And calling this functions:

public override void RowSelected (UITableView tableView, NSIndexPath indexPath)
{
    if (indexPath.Row == 3) {
        if (datePickerIsShowing) {
            hideDatePickerCell ();
        } else {
            showDatePickerCell ();
        }
    }

    this.TableView.DeselectRow (indexPath, true);
}

Answer 5

Using the storyboard and a static table I was able to achieve the same result using the following code. This is a great solution because if you have many oddly shaped cells or want to have multiple cells that are dynamically shown/hidden this code will still work.

@interface StaticTableViewController: UITableViewController

@property (weak, nonatomic) IBOutlet UITableViewCell *dateTitleCell; // cell that will open the date picker. This is linked from the story board
@property (nonatomic, assign, getter = isDateOpen) BOOL dateOpen;

@end


@implementation StaticTableViewController

-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    // This is the index path of the date picker cell in the static table
    if (indexPath.section == 1 && indexPath.row == 1 && !self.isDateOpen){
        return 0;
    }
    return [super tableView:tableView heightForRowAtIndexPath:indexPath];
}

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
    [tableView beginUpdates];
    if (cell == self.dateTitleCell){
        self.dateOpen = !self.isDateOpen;
    }
    [tableView reloadData];
    [self.tableView endUpdates];
}

Answer 6

With iOS7, Apple released the sample code DateCell.

Demonstrates formatted display of date objects in table cells and use of UIDatePicker to edit those values. As a delegate to this table, the sample uses the method "didSelectRowAtIndexPath" to open the UIDatePicker control.

For iOS 6.x and earlier, UIViewAnimation is used for sliding the UIDatePicker up on-screen and down off-screen. For iOS 7.x, the UIDatePicker is added in-line to the table view.

The action method of the UIDatePicker will directly set the NSDate property of the custom table cell. In addition, this sample shows how to use NSDateFormatter class to achieve the custom cell's date-formatted appearance.

You can download the sample code here: DateCell.