Cheapshot-PickerView

Picker View for iOS

Adding to your project

1. Add CSPickerView.h and CSPickerView.m to your project;
2. Add QuartzCore framework in builds phases.

Usage

Picker works on the basis of two types of Table View, are assigned tags kCSPickerViewBackTableTag and kCSPickerViewFrontTableTag. These tags should use in the methods of the delegate and the data source.

• kCSPickerViewBackTableTag for the table in the back;
• kCSPickerViewFrontTableTag for the table in the front.

To start, create Picker View in viewDidLoad:

- (void)viewDidLoad
{
	[super viewDidLoad];
	
	CSPickerView *pickerView = [[CSPickerView alloc] initWithFrame:self.view.bounds];
	pickerView.delegate = self;
	pickerView.dataSource = self;
	[self.view addSubview:pickerView];
}

You need to add a delegate (CSPickerViewDelegate) and data source (CSPickerViewDataSource) in your class and implement the required methods:

1. CSPickerViewDataSource;
   1. - (NSInteger)pickerView:(CSPickerView *)pickerView numberOfRowsInTableView:(UITableView *)tableView;
   2. - (UITableViewCell *)pickerView:(CSPickerView *)pickerView tableView:(UITableView *)tableView cellForRow:(NSInteger)row;
   3. - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath (recommended);
2. CSPickerViewDelegate;
   1. - (void)pickerView:(CSPickerView *)pickerView customizeTableView:(UITableView *)tableView (optional);
   2. - (void)pickerView:(CSPickerView *)pickerView didSelectRow:(NSInteger)row (optional).

Use the tags (kCSPickerViewBackTableTag, kCSPickerViewFrontTableTag) to split the definition of a table cell to the table at the back and to the table at the front:

- (UITableViewCell *)pickerView:(CSPickerView *)pickerView tableView:(UITableView *)tableView cellForRow:(NSInteger)row
{
    // Create table cell.
    NSString *identifier = (tableView.tag == kCSPickerViewFrontTableTag
                            ? kCSPickerViewFrontCellIdentifier 
                            : kCSPickerViewBackCellIdentifier);
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
        if (tableView.tag == kCSPickerViewBackTableTag) {
        	// Customize a cell to the table in back.
        } else {
        	// Customize a cell to the table in front.
        }
    }
    
    // Populate table cell.
    
    return cell;
}

I recommend using a different height cells:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return tableView.tag == kCSPickerViewFrontTableTag ? 60.f : 30.f;
}

A few examples implemented in the project PickerView.

Licence

Cheapshot Picker View is available under the MIT license.