AddViewController.m
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上传日期:2020-05-13
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- /*
- File: AddViewController.m
- Abstract:
- Displays the details of a new Book object and allows the user the edit them. The majority of functionality is identical
- to and inherited from the DetailViewController class. This class implements a different navigation bar and action
- methods for saving or cancelling new book creation.
- Version: 1.9
-
- Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
- Inc. ("Apple") in consideration of your agreement to the following
- 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
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
- MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
- 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) 2008 Apple Inc. All Rights Reserved.
-
- */
- #import "AddViewController.h"
- #import "Book.h"
- #import "AppDelegate.h"
- @implementation AddViewController
- - (void)viewDidLoad {
- // Override the DetailViewController viewDidLoad with different navigation bar items and title
- self.title = @"New Book";
- self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
- target:self action:@selector(cancel:)] autorelease];
- self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave
- target:self action:@selector(save:)] autorelease];
- }
- - (void)viewWillAppear:(BOOL)animated {
- [super viewWillAppear:animated];
- // Conditionally enable the "Save" button
- self.navigationItem.rightBarButtonItem.enabled = (self.book.title && self.book.title.length > 0 &&
- self.book.copyright && self.book.author && self.book.author.length > 0);
- }
- - (IBAction)cancel:(id)sender {
- [self.navigationController dismissModalViewControllerAnimated:YES];
- }
- - (IBAction)save:(id)sender {
- AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
- // Add the book to the global array of books
- [appDelegate addBook:self.book];
- // Dismiss the modal view to return to the main list
- [self.navigationController dismissModalViewControllerAnimated:YES];
- }
- @end