Oliver Drobnik odrobnik
odrobnik
/ gist:2711594
Created May 16, 2012
Force decompression of UIImage on background queue before setting on UIImageView
View gist:2711594
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| 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
A physical jump/bounce animation as CAKeyframeAnimation
View gist:2769082
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| + (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 Jun 4, 2012
Please comment: adding tap and long press action with blocks to any view
View gist:2865589
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| #import <objc/runtime.h> | |
| @implementation UIView (DTActionHandlers) | |
| - (id)tapActionBlock | |
| { | |
| return objc_getAssociatedObject(self, "DTActionHandlerTap"); | |
| } | |
| - (void)addTapActionWithBlock:(void (^)(void))block |
odrobnik
/ gist:2867970
Created Jun 4, 2012
Riddle: why is the parameter UIView in one place and UITapGestureRecognizer in another?
View gist:2867970
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| #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) |
View gist:2872435
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| - (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); |
View gist:2881890
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| 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 |
View gist:3104795
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| 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 |
View gist:3104860
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| - (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 Aug 31, 2012
CoreImage: EAGLContext framebuffer or renderbuffer incorrectly configured!
View gist:3554385
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| - (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; | |
View gist:3554821
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| - (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 |