Mobile Developer Tips » Graphics http://MobileDeveloperTips.com iOS Developer Tips, Tricks and Tutorials. Wed, 16 May 2012 12:25:56 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Converting Radians to Degrees and Degrees to Radians http://MobileDeveloperTips.com/graphics/radians-to-degrees-and-degrees-to-radians.html http://MobileDeveloperTips.com/graphics/radians-to-degrees-and-degrees-to-radians.html#comments Tue, 12 Apr 2011 07:01:00 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=8178 Converting Radians to Degrees and Degrees to Radians is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Converting Radians to Degrees and Degrees to Radians is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In mathematics, a radian is often used as a standard unit of measure when expressing angles. For various methods in iOS classes that deal with angles and rotation, the parameters and return values are often in [...] Related posts:
  1. Rotate an Image with Animation – Part 1
  2. Rotate an Image or Button with Animation – Part 2
  3. Converting Between C and Objective-C Strings (NSString)
]]> http://MobileDeveloperTips.com/graphics/radians-to-degrees-and-degrees-to-radians.html/feed 2 Creating Background Patterns http://MobileDeveloperTips.com/graphics/creating-background-patterns.html http://MobileDeveloperTips.com/graphics/creating-background-patterns.html#comments Mon, 14 Mar 2011 08:07:53 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=8112 Creating Background Patterns is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Creating Background Patterns is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Beyond custom images and solid colors, a nice effect for a background is to use a repeating pattern. The code example that follows shows just how easy this is. For this example, I started with the image below, a photo that [...] Related posts:
  1. How to Crop an Image
  2. Creating Unique Looking Tables with Custom Cells
  3. Download, Create and Display an Image from URL
]]> http://MobileDeveloperTips.com/graphics/creating-background-patterns.html/feed 4 Drag an Image within the Bounds of Superview http://MobileDeveloperTips.com/graphics/drag-an-image-within-the-bounds-of-superview.html http://MobileDeveloperTips.com/graphics/drag-an-image-within-the-bounds-of-superview.html#comments Mon, 17 Jan 2011 08:04:04 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=7484 Drag an Image within the Bounds of Superview is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Drag an Image within the Bounds of Superview is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved This post demonstrates how to drag an image on screen, respecting the bounds of the images superview. The first step is to create a class that inherits from UIImageView, I’ll name the class ImageToDrag. There is [...] Related posts:
  1. How to Crop an Image
  2. Download, Create and Display an Image from URL
  3. Showing Activity Indicator (spinner) in Table Cells
]]> http://MobileDeveloperTips.com/graphics/drag-an-image-within-the-bounds-of-superview.html/feed 4 How to Crop an Image http://MobileDeveloperTips.com/graphics/how-to-crop-an-image.html http://MobileDeveloperTips.com/graphics/how-to-crop-an-image.html#comments Fri, 04 Jun 2010 02:44:29 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=6306 How to Crop an Image is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

How to Crop an Image is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved This post shows an example of one way to crop an image. Let’s begin by looking at a screenshot of the original and cropped image on the iPhone simulator: As you can see, I am cropping a rectangle from [...] Related posts:
  1. Convert an Image (UIImage) to Grayscale
  2. Download, Create and Display an Image from URL
  3. Resize/Scale of an Image – Take 1 – Using an Objective-C Category
]]> http://MobileDeveloperTips.com/graphics/how-to-crop-an-image.html/feed 15 Convert an Image (UIImage) to Grayscale http://MobileDeveloperTips.com/graphics/convert-an-image-uiimage-to-grayscale.html http://MobileDeveloperTips.com/graphics/convert-an-image-uiimage-to-grayscale.html#comments Thu, 13 May 2010 11:07:44 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=6249 Convert an Image (UIImage) to Grayscale is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Convert an Image (UIImage) to Grayscale is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved A trick you won’t need often, yet when the day arrives, you’ll have this up your sleeve – a quick method to convert a UIImage object to grayscale. - (UIImage *)convertImageToGrayScale:(UIImage *)image { // Create image rectangle with [...] Related posts:
  1. Resize/Scale of an Image – Take 1 – Using an Objective-C Category
  2. Resize/Scale of an Image – Take 2 – Coding a Thread Safe Approach
  3. Save UIImage Object as a PNG or JPEG File
]]> http://MobileDeveloperTips.com/graphics/convert-an-image-uiimage-to-grayscale.html/feed 3 Resize/Scale of an Image – Take 2 – Coding a Thread Safe Approach http://MobileDeveloperTips.com/graphics/how-to-resize-scale-an-image-thread-safe-take-2.html http://MobileDeveloperTips.com/graphics/how-to-resize-scale-an-image-thread-safe-take-2.html#comments Mon, 25 Jan 2010 14:37:07 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=5339 Resize/Scale of an Image – Take 2 – Coding a Thread Safe Approach is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Resize/Scale of an Image – Take 2 – Coding a Thread Safe Approach is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In the first post on image resizing, How to Resize/Scale an Image using an Objective-C Category, I wrote barebones approach to resizing an image. This works well for simple cases, however [...] Related posts:
  1. Resize/Scale of an Image – Take 1 – Using an Objective-C Category
  2. Move an Image with Animation
  3. Rotate an Image with Animation – Part 1
]]> http://MobileDeveloperTips.com/graphics/how-to-resize-scale-an-image-thread-safe-take-2.html/feed 7 Gotcha: Case Sensitive PNG Filename http://MobileDeveloperTips.com/graphics/gotcha-case-sensitive-png-filename.html http://MobileDeveloperTips.com/graphics/gotcha-case-sensitive-png-filename.html#comments Thu, 10 Dec 2009 08:07:07 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=4830 Gotcha: Case Sensitive PNG Filename is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Gotcha: Case Sensitive PNG Filename is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Here’s one that will trip you up if you aren’t careful…look at this code: timerButton = [[UIButton alloc] initWithFrame:CGRectMake(104, 410, 50, 50)];   // Notice the filename "timer.png" [timerButton setBackgroundImage:[UIImage imageNamed:@"timer.png"] forState:UIControlStateNormal];   [timerButton addTarget:self action:@selector(buttonPressed:) forControlEvents: UIControlEventTouchUpInside];   [...] Related posts:
  1. Filename and Line Number with NSLog: Part I
  2. Filename and Line Number with NSLog: Part II
  3. How to Prevent iPhone from Sleeping
]]> http://MobileDeveloperTips.com/graphics/gotcha-case-sensitive-png-filename.html/feed 7 Resize/Scale of an Image – Take 1 – Using an Objective-C Category http://MobileDeveloperTips.com/graphics/how-to-scale-an-image-using-an-objective-c-category.html http://MobileDeveloperTips.com/graphics/how-to-scale-an-image-using-an-objective-c-category.html#comments Wed, 11 Nov 2009 08:52:18 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=4576 Resize/Scale of an Image – Take 1 – Using an Objective-C Category is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Resize/Scale of an Image – Take 1 – Using an Objective-C Category is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Editor’s Note: Part 2 of this post Resize/Scale of an Image – Take 2 – Thread Safe Approach takes this idea to the next level, showing how to dynamically resize images using [...] Related posts:
  1. How to Mask an Image
  2. Move an Image with Animation
  3. Download, Create and Display an Image from URL
]]> http://MobileDeveloperTips.com/graphics/how-to-scale-an-image-using-an-objective-c-category.html/feed 13 Animated Gif – Animated Images – iPhone Style http://MobileDeveloperTips.com/graphics/animated-gif-animated-images-iphone-style.html http://MobileDeveloperTips.com/graphics/animated-gif-animated-images-iphone-style.html#comments Thu, 16 Jul 2009 15:01:24 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=2594 Animated Gif – Animated Images – iPhone Style is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Using animated gif and animated images with the iPhone SDK. Related posts:
  1. Images and Caching
]]> http://MobileDeveloperTips.com/graphics/animated-gif-animated-images-iphone-style.html/feed 21 Creating iPhone Icons http://MobileDeveloperTips.com/graphics/creating-iphone-icons.html http://MobileDeveloperTips.com/graphics/creating-iphone-icons.html#comments Thu, 18 Sep 2008 07:08:49 +0000 John Muchow http://iPhoneDeveloperTips.com/?p=488 Creating iPhone Icons is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved

Creating iPhone Icons is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved I’ve been poking around for a decent tutorial on how to create icons for the iPhone. Specifically, I am looking for a walk through with either PhotoShop or FireWorks. The icon I have in mind is what will be shown on [...]]]> http://MobileDeveloperTips.com/graphics/creating-iphone-icons.html/feed 1