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刪除了不應該在那裏的冒號，因爲我的選擇器沒有。它固定它，然後發生了這樣的問題：未捕獲的異常錯誤！簡單的文檔應用程序
2012-06-02 22:33:10.083 TinyPix[10433:fb03] load OK
2012-06-02 22:33:10.084 TinyPix[10433:fb03] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<BIDTinyPixDocument 0x6e665a0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key timeStamp.'
*** First throw call stack:
(0x16b0022 0x1841cd6 0x16afee1 0x9c8efe 0x937831 0x936c99 0x5f47 0x5e77 0x93af30 0x93aedb 0x59ed 0x4546e3 0x40778d9 0x4078509 0x15e7803 0x15e6d84 0x15e6c9b 0x15997d8 0x159988a 0x1b626 0x2a5d 0x29c5)
terminate called throwing an exception
這是我的詳細文件：我在self.detailDescriptionLabel.text線得到一個SIGABRT錯誤。不知道發生了什麼事。
#import "BIDDetailViewController.h"
@interface BIDDetailViewController()
- (void)configureView;
@end
@implementation BIDDetailViewController
@synthesize detailItem = _detailItem;
@synthesize detailDescriptionLabel = _detailDescriptionLabel;
#pragma mark - Managing the detail item
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
_detailItem = newDetailItem;
// Update the view.
[self configureView];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {
self.detailDescriptionLabel.text = [[self.detailItem valueForKey:@"timeStamp"] description];
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
self.detailDescriptionLabel = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
@end
這是我的文件：
#import "BIDMasterViewController.h"
#import "BIDTinyPixDocument.h"
#import "BIDDetailViewController.h"
@interface BIDMasterViewController() <UIAlertViewDelegate>
@property (strong, nonatomic) NSArray *documentFilenames;
@property (strong, nonatomic) BIDTinyPixDocument *chosenDocument;
-(NSURL *)urlForFilename:(NSString *)filename;
-(void)reloadFiles;
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
@end
@implementation BIDMasterViewController
@synthesize colorControl;
@synthesize documentFilenames;
@synthesize chosenDocument;
@synthesize fetchedResultsController = __fetchedResultsController;
@synthesize managedObjectContext = __managedObjectContext;
- (void)awakeFromNib
{
[super awakeFromNib];
}
-(void)viewWillAppear:(BOOL)animated;
{
[super viewWillAppear:animated];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSInteger selectedColorIndex = [prefs integerForKey:@"selectedColorIndex"];
self.colorControl.selectedSegmentIndex = selectedColorIndex;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
[self reloadFiles];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (void)insertNewObject
{
// get the name
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:@"Filename"
message:@"Enter a name for your new TinyPix document."
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Create", nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[alert show];
}
#pragma mark - Table View
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// The table view should not be re-orderable.
return NO;
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (__fetchedResultsController != nil) {
return __fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"timeStamp" ascending:NO];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:@"Master"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
return __fetchedResultsController;
}
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type) {
case NSFetchedResultsChangeInsert:
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView endUpdates];
}
/*
// Implementing the above methods to update the table view in response to individual changes may have performance implications if a large number of changes are made simultaneously. If this proves to be an issue, you can instead just implement controllerDidChangeContent: which notifies the delegate that all section and object changes have been processed.
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
// In the simplest, most efficient, case, reload the table view.
[self.tableView reloadData];
}
*/
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *object = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[object valueForKey:@"timeStamp"] description];
}
-(NSURL *)urlForFilename:(NSString *)filename {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentDirectory stringByAppendingPathComponent:filename];
NSURL *url = [NSURL fileURLWithPath:filePath];
return url;
}
-(void)reloadFiles {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSFileManager *fm = [NSFileManager defaultManager];
NSError *dirError;
NSArray *files = [fm contentsOfDirectoryAtPath:path error:&dirError];
if (!files) {
NSLog(@"Encountered error while trying to list files in directory %@: %@", path, dirError);
}
NSLog(@"found files: %@", files);
files = [files sortedArrayUsingComparator:^NSComparisonResult(id filename1, id filename2) {
NSDictionary *attr1 = [fm attributesOfItemAtPath:[path stringByAppendingPathComponent:filename1]
error:nil];
NSDictionary *attr2 = [fm attributesOfItemAtPath:[path stringByAppendingPathComponent:filename2]
error:nil];
return [[attr2 objectForKey:NSFileCreationDate] compare:[attr1 objectForKey:NSFileCreationDate]];
}];
self.documentFilenames = files;
[self.tableView reloadData];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.documentFilenames count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FileCell"];
NSString *path = [self.documentFilenames objectAtIndex:indexPath.row];
cell.textLabel.text = path.lastPathComponent.stringByDeletingPathExtension;
return cell;
}
-(IBAction)chooseColor:(id)sender {
NSInteger selectedColorIndex = [(UISegmentedControl *)sender selectedSegmentIndex];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setInteger:selectedColorIndex forKey:@"selectedColorIndex"];
}
-(void)alertView:(UIAlertView *)alertView
didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == 1) {
NSString *filename = [NSString stringWithFormat:@"%@.tinypix",
[alertView textFieldAtIndex:0].text];
NSURL *saveUrl = [self urlForFilename:filename];
self.chosenDocument = [[BIDTinyPixDocument alloc] initWithFileURL:saveUrl];
[chosenDocument saveToURL:saveUrl
forSaveOperation:UIDocumentSaveForCreating
completionHandler:^(BOOL success) {
if (success) {
NSLog(@"save OK");
[self reloadFiles];
[self performSegueWithIdentifier:@"masterToDetail"
sender:self];
} else {
NSLog(@"failed to save!");
}
}];
}
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if (sender == self) {
// if sender == self, a new document has just been created,
// and chosenDocument is already set.
UIViewController *destination = segue.destinationViewController;
if ([destination respondsToSelector:@selector(setDetailItem:)]) {
[destination setValue:self.chosenDocument forKey:@"detailItem"];
}
}else {
// find the chose document from the tableview
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *filename = [documentFilenames objectAtIndex:indexPath.row];
NSURL *docUrl = [self urlForFilename:filename];
self.chosenDocument = [[BIDTinyPixDocument alloc] initWithFileURL:docUrl];
[self.chosenDocument openWithCompletionHandler:^(BOOL success) {
if (success) {
NSLog(@"load OK");
UIViewController *destination = segue.destinationViewController;
if ([destination respondsToSelector:@selector(setDetailItem:)]) {
[destination setValue:self.chosenDocument forKey:@"detailItem"];
}
}else {
NSLog(@"failed to load!");
}
}];
}
}
@end
這工作，但導致上述問題 – Devj
沒有任何人，我從書源代碼下載了確切的項目，它仍然無法正常工作。真是笑話。謝謝你的時間 – Devj