Oliver Drobnik odrobnik
odrobnik
/ gist:2711594
Created
May 16, 2012 15:58
Force decompression of UIImage on background queue before setting on UIImageView
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| dispatch_queue_t queue = dispatch_queue_create("PlusFlickrPhotoView Queue", DISPATCH_QUEUE_CONCURRENT); | |
| dispatch_async(queue, ^{ | |
| // force decompress of image | |
| UIGraphicsBeginImageContext(CGSizeMake(1, 1)); | |
| [image drawAtPoint:CGPointZero]; | |
| UIGraphicsEndImageContext(); | |
| // set the image on main thread | |
| dispatch_sync(dispatch_get_main_queue(), ^{ |
odrobnik
/ gist:2769082
Created
May 22, 2012 13:32
A physical jump/bounce animation as CAKeyframeAnimation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| + (CAKeyframeAnimation *)jumpAnimation | |
| { | |
| // these three values are subject to experimentation | |
| CGFloat initialMomentum = 150.0f; // positive is upwards, per sec | |
| CGFloat gravityConstant = 250.0f; // downwards pull per sec | |
| CGFloat dampeningFactorPerBounce = 0.6; // percent of rebound | |
| // internal values for the calculation | |
| CGFloat momentum = initialMomentum; // momentum starts with initial value | |
| CGFloat positionOffset = 0; // we begin at the original position |
odrobnik
/ gist:2865589
Created
June 4, 2012 00:21
Please comment: adding tap and long press action with blocks to any view
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #import <objc/runtime.h> | |
| @implementation UIView (DTActionHandlers) | |
| - (id)tapActionBlock | |
| { | |
| return objc_getAssociatedObject(self, "DTActionHandlerTap"); | |
| } | |
| - (void)addTapActionWithBlock:(void (^)(void))block |
odrobnik
/ gist:2867970
Created
June 4, 2012 12:11
Riddle: why is the parameter UIView in one place and UITapGestureRecognizer in another?
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #import "UIView+DTActionHandlers.h" | |
| #import <objc/runtime.h> | |
| char * const kDTActionHandlerTapBlockKey = "DTActionHandlerTapBlockKey"; | |
| char * const kDTActionHandlerTapGestureKey = "DTActionHandlerTapGestureKey"; | |
| char * const kDTActionHandlerLongPressBlockKey = "DTActionHandlerLongPressBlockKey"; | |
| char * const kDTActionHandlerLongPressGestureKey = "DTActionHandlerLongPressGestureKey"; | |
| @implementation UIView (DTActionHandlers) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| - (void)drawTextInRect:(CGRect)rect | |
| { | |
| [super drawTextInRect:rect]; | |
| CGContextRef ctx = UIGraphicsGetCurrentContext(); | |
| NSString *fontName = self.font.fontName; | |
| CGFloat fontSize = self.font.pointSize; | |
| CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)fontName, fontSize, NULL); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Please help complete and sort this list. These are the icons visible in the WWDC 2012 Banner. Roughly sorted by size. | |
| http://www.cocoanetics.com/files/WWDC2012_Banner.png | |
| alternate, high res pictures of the Banner: | |
| http://cdn.macrumors.com/article-new/2012/06/photo.jpg | |
| Path - http://itunes.apple.com/us/app/path/id403639508?mt=8 | |
| Star Walk - http://itunes.apple.com/app/star-walk-guide-dastronomie/id295430577?mt=8 | |
| Instagram - http://itunes.apple.com/us/app/instagram/id389801252?mt=8 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Process: GeoCorder [45519] | |
| Path: /Users/USER/Library/Application Support/iPhone Simulator/*/GeoCorder.app/GeoCorder | |
| Identifier: GeoCorder | |
| Version: ??? (???) | |
| Code Type: X86 (Native) | |
| Parent Process: launchd [131] | |
| Date/Time: 2012-07-10 21:32:53.939 +0300 | |
| OS Version: Mac OS X 10.7.4 (11E53) | |
| Report Version: 9 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| - (void)recordLocation:(CLLocation *)location | |
| { | |
| if (previousRecordedLocation) | |
| { | |
| NSTimeInterval interval = [location.timestamp timeIntervalSinceDate:previousRecordedLocation.timestamp]; | |
| NSTimeInterval distance = [location distanceFromLocation:previousRecordedLocation]; | |
| CLLocationDistance currentSpeed = distance/interval; | |
| if (previousRecordedSpeed) |
odrobnik
/ gist:3554385
Created
August 31, 2012 15:15
CoreImage: EAGLContext framebuffer or renderbuffer incorrectly configured!
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| - (void)drawCIImage:(CIImage *)image | |
| { | |
| CGRect rect = [image extent]; | |
| // http://stackoverflow.com/questions/8778117/video-filtering-in-iphone-is-slow | |
| GLuint _renderBuffer; | |
| CGContextRef cgContext; | |
| CIContext *coreImageContext; | |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| - (void)drawCIImage:(CIImage *)image | |
| { | |
| CGRect rect = [image extent]; | |
| CIContext *coreImageContext; | |
| EAGLContext *glContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]; | |
| [EAGLContext setCurrentContext:glContext]; | |
| // http://developer.apple.com/library/ios/#documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/WorkingwithEAGLContexts/WorkingwithEAGLContexts.html |