Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Classes/RootViewController.m
/* |
File: RootViewController.m |
Abstract: The main UITableViewController. |
Version: 1.5 |
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple |
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terms, and your use, installation, modification or redistribution of |
this Apple software constitutes acceptance of these terms. If you do |
not agree with these terms, please do not use, install, modify or |
redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and |
subject to these terms, Apple grants you a personal, non-exclusive |
license, under Apple's copyrights in this original Apple software (the |
"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. may |
be used to endorse or promote products derived from the Apple Software |
without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or |
implied, are granted by Apple herein, including but not limited to any |
patent rights that may be infringed by your derivative works or by other |
works in which the Apple Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
POSSIBILITY OF SUCH DAMAGE. |
Copyright (C) 2011 Apple Inc. All Rights Reserved. |
*/ |
#import "RootViewController.h" |
#import "CompositeSubviewBasedApplicationCell.h" |
#import "HybridSubviewBasedApplicationCell.h" |
// Define one of the following macros to 1 to control which type of cell will be used. |
#define USE_INDIVIDUAL_SUBVIEWS_CELL 1 // use a xib file defining the cell |
#define USE_COMPOSITE_SUBVIEW_CELL 0 // use a single view to draw all the content |
#define USE_HYBRID_CELL 0 // use a single view to draw most of the content + separate label to render the rest of the content |
/* |
Predefined colors to alternate the background color of each cell row by row |
(see tableView:cellForRowAtIndexPath: and tableView:willDisplayCell:forRowAtIndexPath:). |
*/ |
#define DARK_BACKGROUND [UIColor colorWithRed:151.0/255.0 green:152.0/255.0 blue:155.0/255.0 alpha:1.0] |
#define LIGHT_BACKGROUND [UIColor colorWithRed:172.0/255.0 green:173.0/255.0 blue:175.0/255.0 alpha:1.0] |
@implementation RootViewController |
@synthesize tmpCell, data, cellNib; |
#pragma mark - |
#pragma mark View controller methods |
- (void)viewDidLoad |
{ |
[super viewDidLoad]; |
self.navigationController.navigationBar.tintColor = [UIColor darkGrayColor]; |
// Configure the table view. |
self.tableView.rowHeight = 73.0; |
self.tableView.backgroundColor = DARK_BACKGROUND; |
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone; |
// Load the data. |
NSString *dataPath = [[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"]; |
self.data = [NSArray arrayWithContentsOfFile:dataPath]; |
// create our UINib instance which will later help us load and instanciate the |
// UITableViewCells's UI via a xib file. |
// |
// Note: |
// The UINib classe provides better performance in situations where you want to create multiple |
// copies of a nib file’s contents. The normal nib-loading process involves reading the nib file |
// from disk and then instantiating the objects it contains. However, with the UINib class, the |
// nib file is read from disk once and the contents are stored in memory. |
// Because they are in memory, creating successive sets of objects takes less time because it |
// does not require accessing the disk. |
// |
self.cellNib = [UINib nibWithNibName:@"IndividualSubviewsBasedApplicationCell" bundle:nil]; |
} |
- (void)viewDidUnload |
{ |
[super viewDidLoad]; |
self.data = nil; |
self.tmpCell = nil; |
self.cellNib = nil; |
} |
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation |
{ |
return YES; |
} |
#pragma mark - |
#pragma mark Table view methods |
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView |
{ |
return 1; |
} |
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section |
{ |
return [data count]; |
} |
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath |
{ |
static NSString *CellIdentifier = @"ApplicationCell"; |
ApplicationCell *cell = (ApplicationCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; |
if (cell == nil) |
{ |
#if USE_INDIVIDUAL_SUBVIEWS_CELL |
[self.cellNib instantiateWithOwner:self options:nil]; |
cell = tmpCell; |
self.tmpCell = nil; |
#elif USE_COMPOSITE_SUBVIEW_CELL |
cell = [[[CompositeSubviewBasedApplicationCell alloc] initWithStyle:UITableViewCellStyleDefault |
reuseIdentifier:CellIdentifier] autorelease]; |
#elif USE_HYBRID_CELL |
cell = [[[HybridSubviewBasedApplicationCell alloc] initWithStyle:UITableViewCellStyleDefault |
reuseIdentifier:CellIdentifier] autorelease]; |
#endif |
} |
// Display dark and light background in alternate rows -- see tableView:willDisplayCell:forRowAtIndexPath:. |
cell.useDarkBackground = (indexPath.row % 2 == 0); |
// Configure the data for the cell. |
NSDictionary *dataItem = [data objectAtIndex:indexPath.row]; |
cell.icon = [UIImage imageNamed:[dataItem objectForKey:@"Icon"]]; |
cell.publisher = [dataItem objectForKey:@"Publisher"]; |
cell.name = [dataItem objectForKey:@"Name"]; |
cell.numRatings = [[dataItem objectForKey:@"NumRatings"] intValue]; |
cell.rating = [[dataItem objectForKey:@"Rating"] floatValue]; |
cell.price = [dataItem objectForKey:@"Price"]; |
return cell; |
} |
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath |
{ |
cell.backgroundColor = ((ApplicationCell *)cell).useDarkBackground ? DARK_BACKGROUND : LIGHT_BACKGROUND; |
} |
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath |
{ |
[tableView deselectRowAtIndexPath:indexPath animated:YES]; |
} |
#pragma mark - |
#pragma mark Memory management |
- (void)dealloc |
{ |
[data release]; |
[tmpCell release]; |
[cellNib release]; |
[super dealloc]; |
} |
@end |
Copyright © 2011 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2011-01-11