Question

我在AllListsViewController.m中遇到协议错误，但无法找出原因。还有其他一些我已经注释掉的错误。

AllListsViewController.m

#import "AllListsViewController.h"
#import "ChecklistViewController.h"
#import "Checklist.h"
#import "ChecklistItem.h"

@interface AllListsViewController ()

@end

@implementation AllListsViewController
/* Method 'listDetailViewController:didFinishAddingChecklist' in protocol not  implemented
   Method 'listDetailViewController:didFinishEditingChecklist' in protocol not implemented
   Method 'listDetailViewControllerDidCancel:' in protocol not implemented
 */
{
    NSMutableArray *_lists;
}

-(NSString *)documentsDirectory
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths firstObject];
    return documentsDirectory;
}

-(NSString *)dataFilePath
{
    return [[self documentsDirectory] stringByAppendingPathComponent:@"Checklists.plist"];
}

-(void)saveChecklistItems
{
    NSMutableData *data = [[NSMutableData alloc] init];
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    [archiver encodeObject:_lists forKey:@"Checklists"];
    [archiver finishEncoding];
    [data writeToFile:[self dataFilePath] atomically:YES];
}

-(void)loadChecklists
{
    NSString *path = [self dataFilePath];
    if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
        NSData *data = [[NSData alloc] initWithContentsOfFile:path];
        NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];

        _lists = [unarchiver decodeObjectForKey:@"Checklists"];
        [unarchiver finishDecoding];

    } else {
        _lists = [[NSMutableArray alloc] initWithCapacity:20];
    }
}

-(id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder])) {

        _lists = [[NSMutableArray alloc] initWithCapacity:20];

        Checklist *list;

        list = [[Checklist alloc] init];
        list.name = @"Birthdays";
        [_lists addObject:list];

        list = [[Checklist alloc] init];
        list.name = @"Groceries";
        [_lists addObject:list];

        list = [[Checklist alloc] init];
        list.name = @"Cool Apps";
        [_lists addObject:list];

        list = [[Checklist alloc] init];
        list.name = @"To Do";
        [_lists addObject:list];

        for (Checklist *list in _lists) {
            ChecklistItem *item = [[ChecklistItem alloc] init];
            item.text = [NSString stringWithFormat:@"Item for %@", list.name];
            [list.items addObject:item];
        [self loadChecklists];
        }
    return self;
}

- (void)viewDidLoad // Use of undeclared identifier 'viewDidLoad'
{
    [super viewDidLoad];

    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

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

#pragma mark - Table view data source

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

    // Return the number of rows in the section.
    return [_lists count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Configure the cell...

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                      reuseIdentifier:CellIdentifier];

    }

    Checklist *checklist = _lists[indexPath.row];
    cell.textLabel.text = checklist.name;
    cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    Checklist *checklist = _lists[indexPath.row];
    [self performSegueWithIdentifier:@"ShowChecklist" sender:checklist];
}

#pragma mark - Table View Delegate Protocol


/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return YES;
}
*/


// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    [_lists removeObjectAtIndex:indexPath.row];

    NSArray *indexPaths = @[indexPath];
    [tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];
}


/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/


#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"ShowChecklist"]) {
        ChecklistViewController *controller = segue.destinationViewController;
        controller.checklist = sender;
    }
    else if ([segue.identifier isEqualToString:@"AddChecklist"]) {
        UINavigationController *navigationController = segue.destinationViewController;

        ListDetailViewController *controller = (ListDetailViewController *)navigationController.topViewController;

        controller.delegate = self;
        controller.checklistToEdit = nil;
    }
}

-(void)listDetailViewControllerDidCancel:(ListDetailViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void)listDetailViewController:(ListDetailViewController *)controller didFinishAddingChecklist:(Checklist *)checklist
{
    NSInteger newRowIndex = [_lists count];
    [_lists addObject:checklist];

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:0];

    NSArray *indexPaths = @[indexPath];
    [self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void)listDetailViewController:(ListDetailViewController *)controller didFinishEditingChecklist:(Checklist *)checklist
{
    NSInteger index = [_lists indexOfObject:checklist];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];

    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
    cell.textLabel.text = checklist.name;

    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
    UINavigationController *navigationController = [self.storyboard instantiateViewControllerWithIdentifier:@"ListNavigationController"];

    ListDetailViewController *controller = (ListDetailViewController *)navigationController.topViewController;

    controller.delegate = self;

    Checklist *checklist = _lists[indexPath.row];
    controller.checklistToEdit = checklist;

    [self presentViewController:navigationController animated:YES completion:nil];
}

@end // Missing "end" | Expected "}"

AllListsViewController.h

#import <UIKit/UIKit.h>
#import "ListDetailViewController.h"

@interface AllListsViewController : UITableViewController <ListDetailViewControllerDelegate>

@end

ListDetailViewController.h

#import <UIKit/UIKit.h>

@class ListDetailViewController;
@class Checklist;

@protocol ListDetailViewControllerDelegate <NSObject>

-(void)listDetailViewControllerDidCancel:(ListDetailViewController *)controller;

-(void)listDetailViewController:(ListDetailViewController *)controller didFinishAddingChecklist:(Checklist *)checklist;

-(void)listDetailViewController:(ListDetailViewController *)controller didFinishEditingChecklist:(Checklist *)checklist;

@end

@interface ListDetailViewController : UITableViewController

@property (nonatomic, weak) IBOutlet UITextField *textField;
@property (nonatomic, weak) IBOutlet UIBarButtonItem *doneBarButton;

@property (nonatomic, weak) id <ListDetailViewControllerDelegate> delegate;
@property (nonatomic, strong) Checklist *checklistToEdit;

-(IBAction)cancel;
-(IBAction)done;

@end

Answer 1

基于您收到有关缺失结尾的错误以及＆＃34;预期＆＃39;}＆＃39;，听起来您的代码中有大括号不匹配。通过查看代码很难发现这种事情，但在Xcode中很容易。双击每个开口花括号，Xcode将选择块的全部内容直到结束括号。在AllListsViewController.m文件中执行此操作，直到找到没有相应右括号的开括花括号。

协议未在AllListsViewController.m＆＃39;中实施;其他错误

1 个答案: