/* |
File: RecipeListTableViewController.m |
Abstract: The UITableViewController for displaying a list of recipes |
Version: 1.2 |
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*/ |
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#import "RecipeListTableViewController.h" |
#import "RecipeDetailViewController.h" |
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#import "Recipe.h" |
#import "RecipesController.h" |
#import "RecipePrintPageRenderer.h" |
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#import "RecipeTableViewCell.h" |
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@interface RecipeListTableViewController() |
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- (void)printSelectedRecipes:(id)sender; |
@property (nonatomic, strong) RecipesController *recipesController; |
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@end |
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@implementation RecipeListTableViewController |
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// Custom initializer that makes the recipes/model controller available to the table view controller. |
- (id)initWithStyle:(UITableViewStyle)style recipesController:(RecipesController *)aRecipesController { |
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self = [super initWithStyle:style]; |
if (self) { |
_recipesController = aRecipesController; |
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self.title = NSLocalizedString(@"Recipes",@""); |
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// Add a print button and use self -printSelectedRecipes: as the press handler |
UIBarButtonItem *addButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Print", @"") |
style:UIBarButtonItemStyleBordered |
target:self |
action:@selector(printSelectedRecipes:)]; |
// Set the Print button as the right side button item of this view controller's navigation bar |
self.navigationItem.rightBarButtonItem = addButtonItem; |
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// Increase the height of the table rows - 1 pixel higher than the recipe thumbnails displayed in the table cells. |
self.tableView.rowHeight = 43.0; |
} |
return self; |
} |
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// Release ownership. |
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#pragma mark - |
#pragma mark Printing |
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// Print button handler that sends our print instructions to the OS |
- (void)printSelectedRecipes:(id)sender { |
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// Get a reference to the singleton iOS printing concierge |
UIPrintInteractionController *printController = [UIPrintInteractionController sharedPrintController]; |
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// Throw all recipes into an array to hand off to the printing code. |
NSArray *recipes = [self.recipesController.recipes copy]; |
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// Instruct the printing concierge to use our custom UIPrintPageRenderer subclass when printing this job |
printController.printPageRenderer = [[RecipePrintPageRenderer alloc] initWithRecipes:recipes]; |
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// Ask for a print job object and configure its settings to tailor the print request |
UIPrintInfo *info = [UIPrintInfo printInfo]; |
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// B&W or color, normal quality output for mixed text, graphics, and images |
info.outputType = UIPrintInfoOutputGeneral; |
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// Select the job named this in the printer queue to cancel our print request. |
info.jobName = @"Recipes"; |
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// Instruct the printing concierge to use our custom print job settings. |
printController.printInfo = info; |
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// Present the standard iOS Print Panel that allows you to pick the target Printer, number of pages, double-sided, etc. |
[printController presentAnimated:YES completionHandler:^(UIPrintInteractionController *printController, BOOL completed, NSError *error) { |
; |
}]; |
} |
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#pragma mark - |
#pragma mark UIViewController |
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- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { |
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); |
} |
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#pragma mark - |
#pragma mark UITableView Delegate/Datasource |
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// Determines the number of sections within this table view |
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { |
// This displays a single list of recipes, so one section will do. |
return 1; |
} |
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// Determines the number of rows for the argument section number |
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { |
// Since this sample has only one section, assume we were passed section = 1, and return the number of recipes. |
return self.recipesController.countOfRecipes; |
} |
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// Create or Access and return appropriate cell identified by the argument indexPath (i.e. Section number and Row number combination) |
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { |
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// Define an identifier we can associate with table cells. Used with cell reuse as follows. |
static NSString *recipeIdentifier = @"Recipe"; |
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// Ask for a cached cell that's been moved off the screen that we can therefore repurpose for a new cell coming onto the screen. |
RecipeTableViewCell *recipeCell = (RecipeTableViewCell *)[tableView dequeueReusableCellWithIdentifier:recipeIdentifier]; |
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// If no cached cells are available, create one. Depending on your table row height, we only need to create enough to fill one screen. |
// After that, the above call will start working to give us the cell that got scrolled off the screen. |
if (recipeCell == nil) { |
recipeCell = [[RecipeTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:recipeIdentifier]; |
} |
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// Provide to the cell its corresponding recipe depending on the argument row |
recipeCell.recipe = [self.recipesController objectInRecipesAtIndex:indexPath.row]; |
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// Right arrow-looking indicator on the right side of the table view cell |
recipeCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; |
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return recipeCell; |
} |
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// Cell touch handler that pushes the recipe detail view onto the navigation controller stack |
- (void)showRecipe:(Recipe *)recipe animated:(BOOL)animated { |
RecipeDetailViewController *detailViewController = [[RecipeDetailViewController alloc] initWithRecipe:recipe]; |
[self.navigationController pushViewController:detailViewController animated:animated]; |
} |
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// Call the cell touch handler and pass in the recipe associated with the argument section/row |
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { |
Recipe *recipe = [self.recipesController objectInRecipesAtIndex:indexPath.row]; |
[self showRecipe:recipe animated:YES]; |
} |
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@end |