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詳細ビューを備えた単純なテーブルビューを持つプロジェクトに取り組んでいます。

データ ソースは plistです。ユーザー入力を plist に保存してテーブルビューに表示できるようにしようとしています。モーダルに表示および非表示になり、ユーザーが都市の名前と州の名前を追加できる2つのテキストフィールドと、説明を入力するテキストフィールドを持つ追加ビューコントローラーを作成しました。

問題: このデータを既存の plist に保存し、tableview. テーブルビューのコードは次のとおりです。

@implementation TableViewController

@synthesize content, searchResults;



- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

content = [[NSArray alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"]];
}

- (IBAction)add;
{
AddViewController* controller = [[AddViewController alloc] init];
[self presentViewController:controller animated:YES completion:nil];
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

if (tableView == self.searchDisplayController.searchResultsTableView) {
    return [self.searchResults count];

} else {
    return [self.content count];

}
}

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{

NSPredicate *resultPredicate = [NSPredicate predicateWithFormat: @"SELF['city'] BEGINSWITH[c] %@ ", searchText];

searchResults = [[content filteredArrayUsingPredicate:resultPredicate] retain];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
                           scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                  objectAtIndex:[self.searchDisplayController.searchBar
                                                 selectedScopeButtonIndex]]];

return YES;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: CellIdentifier] autorelease];
}

if (tableView == self.searchDisplayController.searchResultsTableView) {
    cell.textLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"city"];
    cell.detailTextLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"state"];
    cell.imageView.image = [UIImage imageNamed:[[self.searchResults objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];
} else {
    cell.textLabel.text = [[self.content objectAtIndex:indexPath.row] valueForKey:@"city"];
    cell.detailTextLabel.text = [[self.content objectAtIndex:indexPath.row] valueForKey:@"state"];
    cell.imageView.image = [UIImage imageNamed:[[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];

}

return cell;
}



- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.searchDisplayController.searchResultsTableView) {
    [self performSegueWithIdentifier: @"showDetails" sender: self];
}
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

if ([segue.identifier isEqualToString:@"showDetails"]) {

    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
    DetailViewController *DVC = [segue destinationViewController];

    if ([self.searchDisplayController isActive]) {

        DVC.cityImageString = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"cityImage"];
        DVC.cityTextString = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"cityText"];
        DVC.cityNameString = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"city"];
        DVC.stateNameString = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"state"];
    } else {

        DVC.cityImageString = [[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"];
        DVC.cityTextString = [[self.content objectAtIndex:indexPath.row] valueForKey:@"cityText"];
        DVC.cityNameString = [[self.content objectAtIndex:indexPath.row] valueForKey:@"city"];
        DVC.stateNameString = [[self.content objectAtIndex:indexPath.row] valueForKey:@"state"];
    }

}
}

のコードは次のaddViewController.hとおりです。

@interface AddViewController : UIViewController <UINavigationControllerDelegate,UIImagePickerControllerDelegate>{

IBOutlet UITextField *cityTextField;
IBOutlet UITextField *stateTextField;
IBOutlet UITextView *cityDescription;

UIImagePickerController* imagePicker;
}
@property (nonatomic, copy) NSString* name;
@property (nonatomic, copy) NSString* description;
@property (nonatomic, strong) UIImage* image;
@property (nonatomic, retain) IBOutlet UINavigationBar* navigationBar;

@property (nonatomic, strong) UITextField *cityTextField;
@property (nonatomic, strong) UITextField *stateTextField;
@property (nonatomic, strong) UITextView *cityDescription;

@property (nonatomic, strong) IBOutlet UIButton* choosePhotoButton;
@property (nonatomic, strong) IBOutlet UIButton* takePhotoButton;



- (IBAction)save;
- (IBAction)cancel;

- (IBAction)choosePhoto;
- (IBAction)takePhoto;

@end

そして最後にビューコントローラーを追加します.m

@implementation AddViewController
@synthesize cityTextField, stateTextField, cityDescription;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (IBAction)save
{
// Make sure the user has entered at least a recipe name
if (self.cityTextField.text.length == 0)
{
    UIAlertView* alertView = [[UIAlertView alloc]
                              initWithTitle:@"Whoops..."
                              message:@"Please enter a city name"
                              delegate:nil
                              cancelButtonTitle:@"OK"
                              otherButtonTitles:nil];

    [alertView show];
    [alertView release];
    return;
}

if (self.stateTextField.text.length == 0)
{
    UIAlertView* alertView = [[UIAlertView alloc]
                              initWithTitle:@"Whoops..."
                              message:@"Please enter a city name"
                              delegate:nil
                              cancelButtonTitle:@"OK"
                              otherButtonTitles:nil];

    [alertView show];
    [alertView release];
    return;
}
// Make sure the user has entered at least a recipe name
if (self.cityDescription.text.length == 0)
{
    UIAlertView* alertView = [[UIAlertView alloc]
                              initWithTitle:@"Whoops..."
                              message:@"Please enter city description"
                              delegate:nil
                              cancelButtonTitle:@"OK"
                              otherButtonTitles:nil];

    [alertView show];
    [alertView release];
    return;
}

self.name = self.cityTextField.text;
self.name = self.stateTextField.text;
self.description = self.cityDescription.text;


if ([[self parentViewController] respondsToSelector:@selector(dismissViewControllerAnimated:)]){

    [[self parentViewController] dismissViewControllerAnimated:YES completion:nil];

} else {

    [[self presentingViewController] dismissViewControllerAnimated:YES completion:nil];
}
}

- (IBAction)cancel {
{

    if ([[self parentViewController] respondsToSelector:@selector(dismissModalViewControllerAnimated:)]){

        [[self parentViewController] dismissViewControllerAnimated:YES completion:nil];

    } else {

        [[self presentingViewController] dismissViewControllerAnimated:YES completion:nil];
    }
}
}

- (IBAction)choosePhoto
{
// Show the image picker with the photo library
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.delegate = self;
imagePicker.allowsEditing = YES;
[self presentViewController:imagePicker animated:YES completion:nil];
}

- (IBAction)takePhoto {

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:picker animated:YES completion:NULL];

}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

UITouch *touch = [touches anyObject];
if ([cityDescription isFirstResponder] && [touch view] != cityDescription) {

    [cityDescription resignFirstResponder];
}
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

[cityTextField resignFirstResponder];
[stateTextField resignFirstResponder];
}

#pragma mark -
#pragma mark UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController*)picker     didFinishPickingMediaWithInfo:(NSDictionary*)info
{
// We get here when the user has successfully picked an image.
// Put the image in our property and set it on the button.

if (imagePicker) {
    self.image = [info objectForKey:UIImagePickerControllerEditedImage];
    [self.choosePhotoButton setImage:self.image forState:UIControlStateNormal];
} else {

    if (picker) {
        self.image = [info objectForKey:UIImagePickerControllerEditedImage];
        [self.takePhotoButton setImage:self.image forState:UIControlStateNormal];
    }
}

[self dismissViewControllerAnimated:YES completion:nil];
[imagePicker release];
imagePicker = nil;
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker
{
[self dismissViewControllerAnimated:YES completion:nil];
[imagePicker release];
imagePicker = nil;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

ほぼ同じような質問がたくさんあることは知っています。私はそれらの多くを見てきましたが、これで壁にぶつかっていると思います。これを行う適切な方法が思いつきません。それはとても簡単かもしれませんが、私の人生ではこれを理解することができず、それが私が助けを求めようとしている理由です. 私が得ることができるどんな助けにも本当に感謝しています。必要に応じて、簡単にアクセスできるように、サンプル プロジェクトを git ハブに配置できます。また、プロジェクトはios 6と最新のXcodeで構築されています。

PS ここに git ハブのプロジェクトへのリンクがあります: https://github.com/AdrianPhillips/TableSearch

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3 に答える 3

1

実際の「保存」作業を行うコードが見つかりません。UIAlertViewデリゲートにあるはずだと思いますよね？そして、あなたは何が問題なのかを私たちに教えてくれませんでした。次のコードは、おそらくあなたが求めているものです。

[コンテンツ writeToFile:filePath アトミック:YES]

もう 1 つの注意点は、plist をメイン バンドルに戻して保存しないでください。ドキュメント、キャッシュ、またはその他のフォルダーに保存することです。

于 2013-05-09T14:03:53.060 に答える
0

最初に plist を Documents フォルダーにコピーする必要があります。元のアプリ フォルダーに編集することはできません。このクラスを使用してこれを行うことができます。

- (void) CreatePlistCopyInDocuments:(NSString *)plistName {
    // First, test for existence.
    BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *writablePath = [documentsDirectory stringByAppendingPathComponent:plistName];
    success = [fileManager fileExistsAtPath:writablePath];

    if (success) {
        return;
    }

    // The writable file does not exist, so copy from the bundle to the appropriate location.
    NSString *defaultPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:plistName];
    success = [fileManager copyItemAtPath:defaultPath toPath:writablePath error:&error];
    if (!success) {
        NSAssert1(0, @"Failed to create writable file with message '%@'.", [error localizedDescription]);
    }
}

plist 名を渡すだけです。次に、次のように NSMutableDictionary にロードする必要があります。

NSString *documents = [NSHomeDirectory() stringByAppendingString:@"/Documents"];
            NSString *plistInDocuments = [documents stringByAppendingPathComponent:@"UserData.plist"];
            NSMutableDictionary *plistData = [[NSMutableDictionary alloc]initWithContentsOfFile:plistInDocuments];

ディクショナリの値を更新したら、次のようにファイルをドキュメントに書き戻す必要があります。

[plistData writeToFile:plistInDocuments atomically:YES];
于 2013-05-09T14:20:14.933 に答える