iPhone中的刪除功能錯誤

Question

YApp每當我按下從iPhone中的模擬器的刪除按鈕時崩潰。我在這裏從我的項目中複製了一些代碼。我如何解決刪除錯誤？

我發現了一個類似的問題，Error in the delete function of the alarm app in iPhone，但它不回答我的問題。

我的代碼如下。

#import "FirstPage.h" 

@implementation FirstPage 
@synthesize datePicker, eventText,tableview; 
- (void) viewWillAppear:(BOOL)animated { 
    [self.tableview reloadData]; 
} 

- (IBAction) scheduleAlarm:(id) sender { 
    [eventText resignFirstResponder]; 

    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; 

    // Get the current date 
    NSDate *pickerDate = [self.datePicker date]; 

    // Break the date up into components 
    NSDateComponents *dateComponents = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) 
                fromDate:pickerDate]; 
    NSDateComponents *timeComponents = [calendar components:(NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit) 
                fromDate:pickerDate]; 

    // Set up the fire time 
    NSDateComponents *dateComps = [[NSDateComponents alloc] init]; 
    [dateComps setDay:[dateComponents day]]; 
    [dateComps setMonth:[dateComponents month]]; 
    [dateComps setYear:[dateComponents year]]; 
    [dateComps setHour:[timeComponents hour]]; 
    // Notification will fire in one minute 
    [dateComps setMinute:[timeComponents minute]]; 
    [dateComps setSecond:[timeComponents second]]; 
    NSDate *itemDate = [calendar dateFromComponents:dateComps]; 
    [dateComps release]; 

    UILocalNotification *localNotif = [[UILocalNotification alloc] init]; 
    if (localNotif == nil) 
     return; 
    localNotif.fireDate = itemDate; 
    localNotif.timeZone = [NSTimeZone defaultTimeZone]; 

    // Notification details 
    localNotif.alertBody = [eventText text]; 
    // Set the action button 
    localNotif.alertAction = @"View"; 

    localNotif.soundName = UILocalNotificationDefaultSoundName; 
    localNotif.applicationIconBadgeNumber = 1; 

    // Specify custom data for the notification 
    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:@"someValue" forKey:@"someKey"]; 
    localNotif.userInfo = infoDict; 

    // Schedule the notification 
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif]; 
    [localNotif release]; 

    [self.tableview reloadData]; 

} 

// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. 
/* 
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization. 
    } 
    return self; 
} 
*/ 

- (BOOL)textFieldShouldReturn:(UITextField *)theTextField { 
    [eventText resignFirstResponder]; 
    return YES; 
} 

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
- (void)viewDidLoad { 
    Array = [[NSMutableArray alloc]init]; 
    eventText.delegate = self; 
    [super viewDidLoad]; 
} 

#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 the number of rows in the section. 
    int count = [Array count]; 
    if(self.editing) count++; 
    //return count; 
    return [[[UIApplication sharedApplication] scheduledLocalNotifications] count]; 
} 


// Customize the appearance of table view cells. 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
    } 

    // Configure the cell... 

    NSArray *notificationArray = [[UIApplication sharedApplication] scheduledLocalNotifications]; 
    // notificationArray = Array; 
    notif = [notificationArray objectAtIndex:indexPath.row]; 

    [cell.textLabel setText:notif.alertBody]; 
    [cell.detailTextLabel setText:[notif.fireDate description]]; 

    return cell; 
} 

- (IBAction)DeleteButtonAction:(id)sender 
{ 
    [Array removeLastObject]; 
    [tableview reloadData]; 
} 

- (IBAction) EditTable:(id)sender 
{ 
    if(self.editing) 
    { 
     [super setEditing:NO animated:NO]; 
     [tableview setEditing:NO animated:NO]; 
    // [tableview reloadData]; 
    // [self.navigationItem.leftBarButtonItem setTitle:@"Edit"]; 
    // [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStylePlain]; 
    } 
    else 
    { 
     [super setEditing:YES animated:YES]; 
     [tableview setEditing:YES animated:YES]; 
    // [tableview reloadData]; 
    // [self.navigationItem.leftBarButtonItem setTitle:@"Done"]; 
    // [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStyleDone]; 
    } 
} 

// The editing style for a row is the kind of button displayed to the left of the cell when in editing mode. 
- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // No editing style if not editing or the index path is nil. 
    if (self.editing == NO || !indexPath) return UITableViewCellEditingStyleNone; 
    // Determine the editing style based on whether the cell is a placeholder for adding content or already 
    // existing content. Existing content can be deleted. 
    if (self.editing && indexPath.row == ([Array count])) 
    { 
     return UITableViewCellEditingStyleInsert; 
    } else 
    { 
     return UITableViewCellEditingStyleDelete; 
    } 
    return UITableViewCellEditingStyleNone; 
} 

// Update the data model according to edit actions delete or insert. 
- (void)tableView:(UITableView *)aTableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle 
forRowAtIndexPath:(NSIndexPath *)indexPath 
{ 

    if (editingStyle == UITableViewCellEditingStyleDelete) 
    { 
     [Array removeObjectAtIndex:indexPath.row]; 
    // [tableview reloadData]; 
    } else if (editingStyle == UITableViewCellEditingStyleInsert) 
    { 

    } 
} 

#pragma mark Row reordering 
// Determine whether a given row is eligible for reordering or not. 
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    return YES; 
} 
// Process the row move. This means updating the data model to correct the item indices. 
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath 
     toIndexPath:(NSIndexPath *)toIndexPath 
{ 
    NSString *item = [[Array objectAtIndex:fromIndexPath.row] retain]; 
    [Array removeObject:item]; 
    [Array insertObject:item atIndex:toIndexPath.row]; 
    [item release]; 
} 

/* 
// Override to allow orientations other than the default portrait orientation. 
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
    // Return YES for supported orientations. 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 
*/ 

- (void)didReceiveMemoryWarning { 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 

    // Release any cached data, images, etc. that aren't in use. 
} 

- (void)viewDidUnload { 
    datePicker = nil; 
    tableview = nil; 
    eventText = nil; 
    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 

- (void)dealloc { 
    [super dealloc]; 
} 

@end 

Answer 1

我認爲問題出在下面列出的部分。

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
    // Return the number of rows in the section. 
    int count = [Array count]; 
    if(self.editing) count++; 
    //return count; 
    return [[[UIApplication sharedApplication] scheduledLocalNotifications] count]; 
}