Loaded the nib but didn't get a UITableView

问题:

I have been following this tutorial on YouTube (part 1 and part 2).

I have completed both videos and have hooked up the view controller with the parent view controller using this code:

- (IBAction)searchButtonClicked:(id)sender {
    NSLog(@"It works.");

    SearchViewController *searchViewControl = [self.storyboard instantiateViewControllerWithIdentifier:@"SearchControllerNav"];

    [self presentViewController:searchViewControl animated:YES completion:nil];

}

This code indeed works since this is the same format that I use for my other modal view controllers, so i know that's not the problem.

Anyway, when I tap on the search button in the view controller, it should pop up the SearchViewController. However, the app crashes instead and it gives me this error message:

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UITableViewController loadView] loaded the "jp7-vt-IdA-view-Jer-xW-qlD" nib but didn't get a UITableView.'

I am using Storyboards for this app.

Is there something that I'm missing? Thank you in advance.

A side question: I'm also getting a warning, saying Comparison between pointer and integer ('BOOL *' (aka 'signed char *') and 'int') whenever isFiltered == YES is shown. Is there anyway to fix it?

Here is the code for SearchViewController:

SearchController.h

#import <UIKit/UIKit.h>

@interface SearchViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate> {

}
- (IBAction)cancelButtonTapped:(id)sender;

@property (weak, nonatomic) IBOutlet UISearchBar *mySearchBar;
@property (weak, nonatomic) IBOutlet UITableView *myTableView;

@property (nonatomic, strong) NSMutableArray *itemsInCloudApp;
@property (nonatomic, strong) NSMutableArray *filteredList;
@property BOOL *isFiltered;


@end

SearchViewController.m

#import "SearchViewController.h"

@interface SearchViewController ()

@end

@implementation SearchViewController

@synthesize mySearchBar, myTableView, itemsInCloudApp, filteredList, isFiltered;

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Set title.
    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
    titleLabel.text = @"Search";
    titleLabel.adjustsFontSizeToFitWidth = YES;
    titleLabel.clipsToBounds = YES;
    titleLabel.numberOfLines = 1;
    titleLabel.font = [UIFont fontWithName:@"Avenir-Medium" size:18];
    titleLabel.textColor = [UIColor blackColor];
    titleLabel.autoresizingMask = UIViewAutoresizingFlexibleHeight;
    titleLabel.textAlignment = NSTextAlignmentCenter;
    [titleLabel sizeToFit];

    self.navigationItem.titleView = titleLabel;

    // Alloc and init list.
    itemsInCloudApp = [[NSMutableArray alloc]initWithObjects:@"http://www.apple.com/", @"http://www.trijstudios.com/", @"http://www.google.com/", @"http://www.squarespace.com/", @"http://www.youtube.com/", nil];
}

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

#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.
    if (isFiltered == YES) {
        return [filteredList count];
    } else {
    return [itemsInCloudApp count];
    }
}

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

    // Configure the cell...

    if (isFiltered == YES) {
        cell.textLabel.text = [filteredList objectAtIndex:indexPath.row];
        cell.detailTextLabel.text = [filteredList objectAtIndex:indexPath.row];;
    } else {
        cell.textLabel.text = [itemsInCloudApp objectAtIndex:indexPath.row];
        cell.detailTextLabel.text = [itemsInCloudApp objectAtIndex:indexPath.row];
    }

    return cell;
}

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
    if (searchText.length == 0) {
        // Set bollean flag
        isFiltered = NO;
    } else {
        // Set boolean flag
        isFiltered = YES;

        // Alloc and init our fliteredData
        filteredList = [[NSMutableArray alloc] init];

        // Fast enumeration
        for (NSString *name in itemsInCloudApp) {
            NSRange nameRange = [name rangeOfString:searchText options:NSCaseInsensitiveSearch];

            if (nameRange.location != NSNotFound) {
                [filteredList addObject:name];
            }
        }
    }
    // Reload tableView
    [myTableView reloadData];

}

-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    [mySearchBar resignFirstResponder];
}

- (IBAction)cancelButtonTapped:(id)sender {

    [self dismissViewControllerAnimated:YES completion:nil];

}
@end

NOTE: There are a few edits that I made to fit my needs.

回答1:

have you tried changing your @interface SearchViewController : UITableViewController to @interface SearchViewController : UIViewController

I strongly suspect that either you have not attached your UITableview as View in XIB or your class should be derived UIViewController instead of UITableviewController class..

回答2:

I had a similar error. I was able to resolve it using @Dinesh's suggestion, but I didn't like this because I was afraid that there could be some unintended consequences.

What I figured out was that when I looked at the scene hierarchy in the storyboard, I noticed that I had this structure (sorry, I don't know how to format this - it's supposed to be a tree structure):

View Controller
  View
     Table View

When I took out the View that sat in the middle, my problem went away. However, before doing so, you need to delete any outlets that might exist between the view and either the view controller or the table view. After you make sure that these are gone, follow these final steps:

1. Drag the Table View so that it is a direct descendant of the View Controller.
2. Delete the View
3. Command-Drag from the View Controller to the Table View, thereby creating a new outlet directly between the two.

Also, leave the .h file as a subclass of UITableView (not UIView).

Anyway, that solved the issue for me. If anyone comes across this, I hope that it helps.

回答3:

For you side question regrading the warning, the warning comes because you have made the BOOL isFiltered as a pointer.

回答4:

For your first problem, you needed to check the storyboard. I am sure that your file owner's view is connected to a UIView. To solve this, you must drag UITableView and view must be connected to the UITableView.

For your second problem, declare BOOL as

@property(assign,nonatomic) BOOL isFiltered;

回答5:

I encountered this when building a iOS7 Universal app with a simple, dumb error: I'd built part of the iPhone app only, but had the scheme set to iPad simulator. After getting the error and looking here, I saw my mistake, switched the scheme to iPhone, and the app ran with the proper storyboard for the proper simulator. Hope that helps.