Extension to a Multiple Component PickerInputTableViewCell

TimePickerInputTableViewCell.m

#import "TimePickerInputTableViewCell.h"
#import "DataFormatters.h"

@implementation TimePickerInputTableViewCell

@synthesize delegate= _delegate;
@synthesize time = _time;

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
		self.picker.delegate = self;
		self.picker.dataSource = self;
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        // Initialization code
		self.picker.delegate = self;
		self.picker.dataSource = self;
    }
    return self;
}

- (void)setTime:(NSTimeInterval)value {
	_time = value;
	self.detailTextLabel.text = [[DataFormatters elapsedTimeFormatterHHMM] stringFromDouble:_time];
	
	double minutes = ((NSInteger)(_time/60.0)) % 60;
	double hours = (NSInteger)(_time/3600.0);

	[self.picker selectRow:hours inComponent:0 animated:YES];
	[self.picker selectRow:minutes inComponent:1 animated:YES];
}

#pragma mark -
#pragma mark UIPickerViewDataSource

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
	return 2;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
	if (component == 0) {
		return 24;
	} else {
		return 60;
	}
}

#pragma mark -
#pragma mark UIPickerViewDelegate

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
	return [NSString stringWithFormat:@"%02d", row];
}

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component {
	return 44.0f;
}

- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
	return 100.0f; //pickerView.bounds.size.width - 20.0f;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	self.time = ((double)[pickerView selectedRowInComponent:0] * 3600.0) + ((double)[pickerView selectedRowInComponent:1] * 60.0);
	
	if (_delegate && [_delegate respondsToSelector:@selector(tableViewCell:didEndEditingWithTime:)]) {
		[_delegate tableViewCell:self didEndEditingWithTime:_time];
	}
}

@end

TimePickerTableViewCell.h

#import <Foundation/Foundation.h>
#import "PickerInputTableViewCell.h"

@class TimePickerInputTableViewCell;

@protocol TimePickerInputTableViewCellDelegate <NSObject>
@optional
- (void)tableViewCell:(TimePickerInputTableViewCell *)cell didEndEditingWithTime:(NSTimeInterval)time;
@end

@interface TimePickerInputTableViewCell : PickerInputTableViewCell <UIPickerViewDataSource, UIPickerViewDelegate>

@property (nonatomic, assign) NSTimeInterval time;
@property (weak) IBOutlet id <TimePickerInputTableViewCellDelegate> delegate;

@end