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    <p>Make sure you're either using a UITableViewController subclass as your VC (if you're using a UITableViewController ui object from the pallet), or that you're properly hooking up the UITableView's delegate and datasource properties to your VC (if you're using a plain UIViewController object and subclass). </p> <p>(see comments on question). </p> <p>Try this:</p> <pre><code>- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { NSLog(@"bookLibrary.count %d", bookLibrary.count); return [bookLibrary count]; } </code></pre> <p>You'll find that things are not what you think they are... Add in an implementation of <code>viewDidLoad</code> and <code>viewWillAppear</code> along with that, each with their own "I'm here" NSLog statement, and trace the flow of that second view controller appearing. Again, you'll find you've got some sequencing issues where the flow isn't working quite the way you might be assuming. </p> <hr> <p>Added comment:</p> <p>Ultimately, the origin of your problem is this line in your "sending" controller's prepare for segue method:</p> <pre><code>controller.bookLibrary = [self.entries allValues]; </code></pre> <p>What is this doing? It's calling <code>allValues</code> on the Dictionary object. That method generates a new array (!) containing the values. You don't store that new Array object in any permanent storage. You just use it to set: </p> <pre><code>controller.bookLibrary = ... </code></pre> <p>So, right after that statement executes, you have:</p> <ul> <li>an Array object in your prepareForSegue method (where the code is executing) that you've only stored in one variable/holder, which is:</li> <li>a <em>weak</em> pointer to that object over in your destination view controller (TableViewController)</li> </ul> <p>The method ends. </p> <p>The Array returned by <code>[... allValues]</code> is not being held on to by anything in the Source view controller, so the only thing holding it from being garbage collected is the pointer to it in the Destination view controller. </p> <p>But that pointer is a <em>weak</em> pointer. By definition, if that's the only pointer to an object, the pointer will be set to nil and the object released for garbage collection. <em>Poof!</em> No more array object, and you're left holding a nil pointer. </p> <p>As you discovered, setting the "receiver" to <em>strong</em> lets it hold on to that Array object, even after the other code exits and it's the only pointer to the Array.</p> <p>(And, your code isn't being invoked twice. If you look closely at the logging -- or better yet set a breakpoint inside the table get-row-count method -- you'll see it's only being called once. The earlier logging of "I have 8 objects" is happening over in other code, not in your TableViewController.)</p>
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    1. POiphone development: table view returns empty table
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    1. USBill Patterson
    1. USBill Patterson
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COFirst of all, thank you for very fast response! Secondly, I am doing already.
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    2. COTook a look at your project, and you've got a mix of issues. Put some NSLog statements in your table method and you'll see that your data, when those methods are running, is not what you think it is... Print out the state of your data at every point where you're making assumptions about what data "should exist in which vars right now" and you'll find the stat isn't what you think it is. :-)
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    3. COThank you again for the response. So the problem is with the data and not with how the TableViewController file is associated with the Table View object on the storyboard?
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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