1. Click on the Target
2. Click on Build Phases
3. Open the Compile Sources section
4. Find file you want to exclude and double click on it.
5. Enter the following in to the dialog box -fno-objc-arc and click Done

Let’s say you’ve received JSON data (we’ll call it responseData) from a url and you would like to convert the JSON to an NSDictionary  (dictJSON). Just put in the following code:

NSError *error = nil;
NSDictionary *dictJSON = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
 
if (error) {
    NSLog(@"JSON parse error: %@", [error localizedDescription]);
    return;
}

Begin by opening the AppleScript Editor.  Press Command + Spacebar to open Spotlight, type “AppleScript”, and then press Enter.

Next, enter the following code into the editor.

tell application "Finder"
	activate
	set x to (path to home folder as text) & "Library:Application Support:iPhone Simulator:5.1:Applications" as alias
	open x
end tell

This script will open a Finder window to the Applications folder for the iPhone Simulator version 5.1.  You can run the script now by clicking the Run button to see it work, but to make it so we can easily run it again later, we should save the file.

1. Go to the menu and choose File > Save As.
2. Enter a name for the script.  I entered “Open Simulator Folder”.
3. For where to save the files, I chose my Applications folder.
4. Choose Application for the file format.
5. And Finally Click the Save button.

Now, if you go to your Launchpad, you should be able to find the script and click on it to run it.

The Applications folder stores each of your apps in a folder with a long encrypted name, but you can usually determine which app you want by looking at the Modified date.  Once you open the folder containing your app, you’ll see a file with the name of the app and a Documents folder.  You can then double click on the Documents folder to view all the files your app has saved to the NSDocumentDirectory.

/Users/<your name>/Library/Application Support/iPhone Simulator/<version>/Applications/<app name>/Documents

Type sqlite3 followed by the name of the sqlite file.

sqlite3 myfile.sqlite

Now type .help to see a list of commands or type out straight sql

select * from entityname

To exit sqlite3 type

.exit

// check if app is in the background
[[NSNotificationCenter defaultCenter] addObserver:@"EnteredBackground" selector:@selector(appDidEnterBackground) name:UIApplicationDidEnterBackgroundNotification object:nil];
 
// check if app is in the foreground
[[NSNotificationCenter defaultCenter] addObserver:@"EnteredForeground" selector:@selector(appDidEnterForeground) name:UIApplicationDidBecomeActiveNotification object:nil];

The first one will run the appDidEnterBackground method when the app has, indeed, entered the background.
The second does the same for entering the foreground.

First add the following to your .h file:

NSDate *recordStart;

Next, in the method you wish to time, add the follow code:

recordStart = [NSDate date];
 
// The code you wish to time here
 
NSTimeInterval interval = [[NSDate date] timeIntervalSinceDate:recordStart];
NSLog(@"Stop Recording: %f", interval);

The examples above are using the same image file.

// Stretch an image
UIImage *buttonImage = [[UIImage imageNamed:@"button.png"]
    stretchableImageWithLeftCapWidth:20 topCapHeight:0];

We started out with our own first app, Checklyst. Shortly after that, we’ve released Memory Gizmo Words and Math. Our most popular app, Solitaire Poker, was created in one week. There are several more exciting, full-featured apps currently in the pipeline.

We are now accepting iOS development projects. If you have an iOS app idea, let us know and we could help you make your idea a reality. We develop for any Portable Apple device.

If you required our services, just quickly fill out our form HERE or call us at (702) 714-0321.

Since iOS4, Apple has allowed you to specify certain input types that Mobile Safari (UIWebView) will read to present the correct input element. These are the types:

tel
number
url
email
date
datetime
time
month
range

Phone Field:

<input type="tel" >

Number Field:

<input type="number" >

URL Field:

<input type="url" >

Email Field:

<input type="email" >

Date Field:

<input type="date" >

Date/Time Field:

<input type="datetime" >

Month Field:

<input type="month" >

Time Field:

<input type="time" >

Range Field:

<input type="range" >

One thing iPhone designers love to do these days is add texture to the navigation bar.  Leather and wood grain texures are very popular.  Luckily for iPhone developers, it’s actually a very simple task to incorporate these images into our Apps.  In this iOS Quick Tip.  I’m going to show you how add textures to your iPhone app Navigation Bar.

1. We’re going to start by creating a new project in XCode. In the File menu choose New Project. Choose the Master-Detail Application and click Next. Name your new project NavBarTexture and click Next again.

2. Now we have to add the texture images to the project. I’ve created two 24-bit PNG images for each texture I’m going to demonstrate in this project. One is 640×88 pixles for the retina display screens and the other is 320 x 44 for older iPhones and iPods. Notice that the name of the images match except the larger retina display images end with @2x.

I like to keep my images in a group called images under Supporting Files. You can create this group by Ctl+Click on the Supporting Files group and choose New Group. Then rename the group “images”.

Now we can drag and drop the images into the new image group.

Make sure the option to Copy items into the destinations group’s folder is selected.

3. Finally we’re going to add the code that applys the images to the Navigation Bar. Enter the code you see below into viewDidLoad method in the MasterViewController.m file.

// change the color of the navigation bar.
UINavigationBar *navigationBar = self.navigationController.navigationBar;
UIImage *image = [UIImage imageNamed: @"NavBar-Wood.png"];
[navigationBar setBackgroundImage:image forBarMetrics: UIBarMetricsDefault];
self.navigationController.navigationBar.tintColor = [UIColor brownColor];

This code will set a variable for the navigation bar and another variable for the image we’ll be using as our texture.  In this case, it’s the NavBar-Wood.png image.  It then sets the image as the background for the navigation bar.  The last line will change the tintColor of the navigation buttons.  This is to make them match the image a little bit better.

To change the texture to one of the other examples, all you have to do is change the second line of code where it assigns the PNG file.

UIImage *image = [UIImage imageNamed: @"NavBar-Leather.png"];

Here are the screenshots of all three textures.

You can download these texture and the PSD file here.