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我有這個問題，瞭解如何保存數據，以便爲我的應用程序添加「添加到收藏夾」功能。 該應用程序有一個UITableView，數據存儲在Plist中。從 它進入包含UIImageView和UITextView的DetailView。 我希望能夠將我喜歡的項目加入書籤，並在 分開的視圖中顯示它們。添加到收藏夾功能？
以下是一段代碼，使其更容易地看到：
//BooksLibraryDao.h
#import <Foundation/Foundation.h>
@interface BooksLibraryDao : NSObject {
NSString *libraryPlist;
NSArray *libraryContent;
}
@property (nonatomic, readonly) NSString *libraryPlist;
@property (nonatomic, readonly) NSArray *libraryContent;
- (id)initWithLibraryName:(NSString *)libraryName;
- (NSDictionary *)libraryItemAtIndex:(int)index;
- (int)libraryCount;
@end
//BooksLibraryDao.m
#import "BooksLibraryDao.h"
@implementation BooksLibraryDao
@synthesize libraryContent, libraryPlist;
- (id)initWithLibraryName:(NSString *)libraryName {
if (self = [super init]) {
libraryPlist = libraryName;
libraryContent = [[NSArray alloc] initWithContentsOfFile:[[NSBundle mainBundle]
pathForResource:libraryPlist ofType:@"plist"]];
}
return self;
}
- (NSDictionary *)libraryItemAtIndex:(int)index {
return (libraryContent != nil && [libraryContent count] > 0 && index < [libraryContent count])
? [libraryContent objectAtIndex:index]
: nil;
}
- (int)libraryCount {
return (libraryContent != nil) ? [libraryContent count] : 0;
}
- (void) dealloc {
if (libraryContent) [libraryContent release];
[super dealloc];
}
@end
//BooksTableViewController.h
#import <UIKit/UIKit.h>
#import "BooksLibraryDao.h"
#import "BooksListingViewCell.h"
#import "BooksAppDelegate.h"
@interface BooksTableViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource> {
IBOutlet UITableView *booksTableView;
BooksLibraryDao *dao;
IBOutlet BooksListingViewCell *_cell;
}
@end
//BooksTableViewController.m
#import "BooksTableViewController.h"
#import "DetailViewController.h"
#import "BooksListingViewCell.h"
#import "BooksNavController.h"
@implementation BooksTableViewController
#define CELL_HEIGHT 70.0
#pragma mark -
#pragma mark Initialization
/*
- (id)initWithStyle:(UITableViewStyle)style {
// Override initWithStyle: if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
self = [super initWithStyle:style];
if (self) {
// Custom initialization.
}
return self;
}
*/
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.backgroundColor = [UIColor clearColor];
}
- (void)viewWillAppear:(BOOL)animated {
dao = [[BooksLibraryDao alloc] initWithLibraryName:@"TestData"];
self.title = @"Books";
[self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [dao libraryCount];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"LibraryListingCell";
BooksListingViewCell *cell = (BooksListingViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:@"BooksListingView" owner:self options:nil];
cell = [_cell autorelease];
_cell = nil;
}
cell.titleLabel.text = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"title"];
cell.smallImageView.image = [UIImage imageNamed:[[dao libraryItemAtIndex:indexPath.row] valueForKey:@"smallImage"]];
cell.backgroundColor = [UIColor colorWithRed:9 green:9 blue:9 alpha:.7];
cell.textLabel.backgroundColor = [UIColor clearColor];
cell.textLabel.textColor = [UIColor colorWithRed:.1 green:.1 blue:.1 alpha:1];
cell.selectedBackgroundView = [[[UIImageView alloc] init] autorelease];
UIImage *selectionBackground;
selectionBackground = [UIImage imageNamed:@"cell.png"];
((UIImageView *)cell.selectedBackgroundView).image = selectionBackground;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
DetailViewController *controller = [[DetailViewController alloc]
initWithBookData:[dao libraryItemAtIndex:indexPath.row]
nibName:@"DetailViewController" bundle:[NSBundle mainBundle]];
controller.title = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"title"];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return CELL_HEIGHT;
}
#pragma mark -
#pragma mark Table view delegate
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end
//DetailViewController.h
#import <UIKit/UIKit.h>
#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>
#import <QuartzCore/QuartzCore.h>
@interface DetailViewController : UIViewController <MFMailComposeViewControllerDelegate>{
IBOutlet UIImageView *bookImageView;
IBOutlet UILabel *titleLabel;
IBOutlet UITextView *authorTextView;
IBOutlet UITextView *descriptionTextView;
IBOutlet UILabel *message;
NSDictionary *bookData;
}
@property (nonatomic, retain) UIImageView *bookImageView;
@property (nonatomic, retain) UILabel *titleLabel;
@property (nonatomic, retain) UITextView *descriptionTextView;
@property (nonatomic, retain) UITextView *authorTextView;
@property (nonatomic, retain) IBOutlet UILabel *message;
-(IBAction)showPicker:(id)sender;
-(void)displayComposerSheet;
-(void)launchMailAppOnDevice;
-(IBAction)showAuthor;
-(IBAction)showDesc;
-(IBAction)showImage;
- (id)initWithBookData:(NSDictionary *)data nibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;
@end
//DetailViewController.m
#import "DetailViewController.h"
@implementation DetailViewController
@synthesize bookImageView, titleLabel, descriptionTextView, authorTextView;
@synthesize message;
- (id)initWithBookData:(NSDictionary *)data nibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
bookData = data;
}
return self;
}
- (void)viewDidLoad {
bookImageView.image = [UIImage imageNamed:[bookData valueForKey:@"bookImage"]];
titleLabel.text = [bookData valueForKey:@"title"];
descriptionTextView.text = [bookData valueForKey:@"description"];
authorTextView.text = [bookData valueForKey:@"author"];
[super viewDidLoad];
}
歡迎來到SO！有關發佈人們可以回答的問題的幾條提示。確切地說明你的問題是什麼，並且你想讓人們很容易看到問題並作出迴應。在這個特殊情況下，這只是太多的代碼讓人們參與進來，而且你還沒有清楚你已經嘗試了什麼以及它失敗了。把它修剪成問題的核心，你會得到更好的答案。 –
您要求StackOverflow用戶將功能添加到您的應用程序併爲您編寫代碼。請閱讀關於如何提問的建議，特別是「做家庭作業」和「提出與其他用戶相關的問題」部分的建議。 –
我很抱歉，如果它出現這樣，我只是要求一些指針。 – ftwhere