yuanhao’s gists

yuanhao / gist:2b2cd736b4e630c09052

Last active August 29, 2015 14:17

NSLocale.preferredLanguages()[0]

	简体中文 zh-Hans
	English en
	繁体中文 zh-Hant
	繁体中文香港 zh-HK
	日本语 ja
	韩国 ko



	<CTFontDescriptor: 0x7fbeca6404e0>{attributes = <CFBasicHash 0x7fbecc9c7af0 [0x107bc6eb0]>{type = mutable dict, count = 8,

yuanhao / gist:7ac82ab64d49fe2406d5

Last active August 29, 2015 14:17 — forked from ftake/gist:8397208

	#include <iostream>
	#include <CoreText/CTFont.h>
	#include <CoreText/CTFontCollection.h>
	#include <CoreFoundation/CFString.h>
	#include <CoreFoundation/CFBase.h>

	void callBack(const void value, void context) {
	CTFontDescriptorRef pDesc = static_cast<CTFontDescriptorRef>(value);

	CFStringRef pFamilyName = (CFStringRef)CTFontDescriptorCopyAttribute(pDesc, kCTFontFamilyNameAttribute);

yuanhao / gist:02be1f42755586b6348d

Created March 8, 2015 16:38

Downloadable font names iOS 8

yuanhao / CIFilters

Created March 2, 2015 21:54

CIFilter for Still Image

	CIAccordionFoldTransition
	CIAdditionCompositing
	CIAffineClamp
	CIAffineTile
	CIAffineTransform
	CIAreaHistogram
	CIAztecCodeGenerator
	CIBarsSwipeTransition
	CIBlendWithAlphaMask
	CIBlendWithMask

yuanhao / gist:e91d05721989878f03e5

Created January 16, 2015 18:14

NSStringDrawingOptions

	let options = unsafeBitCast(NSStringDrawingOptions.UsesLineFragmentOrigin.rawValue \| NSStringDrawingOptions.UsesFontLeading.rawValue,
	NSStringDrawingOptions.self)

yuanhao / how to capture a particular portion of screen

Created January 4, 2015 14:09

	UIGraphicsBeginImageContext(self.view.bounds.size);

	[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

	UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

	UIGraphicsEndImageContext();

	CGRect rect = CGRectMake(250,61 ,410, 255);
	CGImageRef imageRef = CGImageCreateWithImageInRect([viewImage CGImage], rect);

yuanhao / snapshotview

Created January 4, 2015 13:57

	+ (UIImage ) imageWithView:(UIView )view
	{
	UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0f);
	[view drawViewHierarchyInRect:view.bounds afterScreenUpdates:NO];
	UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();
	return snapshotImage;
	}

yuanhao / gist:71049b329af0baae2a62

Created January 4, 2015 12:09

	+ (UIImage)imageWithImage:(UIImage)image
	scaledToSize:(CGSize)newSize;
	{
	UIGraphicsBeginImageContext( newSize );
	[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
	UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();

	return newImage;
	}

yuanhao / Save image with custom resolution

Created January 4, 2015 12:06

	UIView* captureView = self.view;

	/* Capture the screen shoot at native resolution */
	UIGraphicsBeginImageContextWithOptions(captureView.bounds.size, captureView.opaque, 0.0);
	[captureView.layer renderInContext:UIGraphicsGetCurrentContext()];
	UIImage * screenshot = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();

	/* Render the screen shot at custom resolution */
	CGRect cropRect = CGRectMake(0 ,0 ,1435 ,1435);

Created January 4, 2015 12:04

	- (UIImage *)captureView {

	float imageScale = sqrtf(powf(faceImageView.transform.a, 2.f) + powf(faceImageView.transform.c, 2.f));
	CGFloat widthScale = faceImageView.bounds.size.width / faceImageView.image.size.width;
	CGFloat heightScale = faceImageView.bounds.size.height / faceImageView.image.size.height;
	float contentScale = MIN(widthScale, heightScale);
	float effectiveScale = imageScale * contentScale;

	CGSize captureSize = CGSizeMake(enclosingView.bounds.size.width / effectiveScale, enclosingView.bounds.size.height / effectiveScale);

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