Code Chunks – iOS

Hello Everyone;  Hope weekend is going well.

Today’s menu is really simple; I will give you some tips regarding iPhone application development. I used them recently, so want to share with you people. Here they are.

1. Screen Resolution

At the time of this post, the iPhones are available in different screen resolutions: 320×480, and the iPhone 4 screen resolution is 640×960. The same is the case for the iPad; currently it is 1024×768, and the iPad 2 is likely to have 2048×1536 screen resolution. So we need to care about this while playing with layouts. Here is a code to determine screen size:

CGRect currentScreen = [[UIScreen mainScreen] bounds];
currentScreen.size.width; // will return the width of screen;
currentScreen.size.height // will return height of screen;

Note: If you rotate your screen to landscape, then height will become width and vise versa;

2. Device Type;

Following piece of code will tell you whether your application is running on iPhone or iPad;

UIDevice* currentDevice = [UIDevice currentDevice];
if(currentDevice.userInterfaceIdiom == UIUserInterfaceIdiomPad)  {
    NSLog(@"oh its iPad");
}else{
    NSLog(@"This is iPhone");
}

3. Current iOS version

UIDevice* currentDevice = [UIDevice currentDevice];
float systemVersion = [currentDevice.systemVersion floatValue];

This float value will tell you the current iOS version of device.

4. Current Orientation

It is common to have different layout for single application in portrait and/or landscape view. In case of iPad it become more significant; Following method will tell you the current orientation of user’s device:

-(int) currentLayout{
if (([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortrait || [[UIApplication sharedApplication] statusBarOrientation] == UIDeviceOrientationPortraitUpsideDown)) {
    // do something for portrait view;
} else { 
     // do something for landscape view;
}

Thats all.
Share Every bit of knowledge you have.
Happy Development;

Author Profile

Aasim Naseem

Hey, Thanks for your interest. I’m a PMP, AWS Solutions Architect, and Scrum Master certified professional with 17+ years of hands-on experience leading projects, building teams, and helping organizations deliver software solutions better, faster, and smarter.

Outside of work, I’ve got a deep curiosity for history — especially ancient civilizations like Egypt. I also enjoy reflecting on the everyday moments that shape how we live and work. This blog is my space to share insights, lessons, and thoughts from both my professional journey and personal interests.

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