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2014/10/15 ¤U¤È 10:13:17

iphone Programming Glossary: renderincontext

How to create a UIImage from the current graphics context?

http://stackoverflow.com/questions/1112947/how-to-create-a-uiimage-from-the-current-graphics-context

I think you may need to setup the graphics context first UIGraphicsBeginImageContext myView.bounds.size myView.layer renderInContext UIGraphicsGetCurrentContext viewImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext share improve..

How to share an image on Instagram in iOS?

http://stackoverflow.com/questions/11393071/how-to-share-an-image-on-instagram-in-ios

CGRectMake 0 0 0 0 UIGraphicsBeginImageContextWithOptions self.view.bounds.size self.view.opaque 0.0 self.view.layer renderInContext UIGraphicsGetCurrentContext UIGraphicsEndImageContext NSString jpgPath NSHomeDirectory stringByAppendingPathComponent @..

How to get the color of a pixel in an UIView?

http://stackoverflow.com/questions/1160229/how-to-get-the-color-of-a-pixel-in-an-uiview

you can do something like this UIImage imageForView UIView view UIGraphicsBeginImageContext view.frame.size view.layer renderInContext UIGraphicsGetCurrentContext UIImage retval UIGraphicsGetImageFromCurrentImageContext void UIGraphicsEndImageContext return..

How to merge the perspective image(3D Transform)?

http://stackoverflow.com/questions/12457047/how-to-merge-the-perspective-image3d-transform

in advance. UIImage mergedImage UIGraphicsBeginImageContext backgroundImageView.frame.size backgroundImageView.layer renderInContext UIGraphicsGetCurrentContext bacgroundImageView here mergedImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..

How to crop the image using UIBezierPath?

http://stackoverflow.com/questions/13153223/how-to-crop-the-image-using-uibezierpath

image on the imageview in that case To get it as an image UIGraphicsBeginImageContext view.bounds.size view.layer renderInContext UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext image should..

Howe to capture UIView top UIView

http://stackoverflow.com/questions/14049796/howe-to-capture-uiview-top-uiview

UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions view.bounds.size view.opaque 0.0 view.layer renderInContext UIGraphicsGetCurrentContext UIImage img UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return img .. bounds UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext self.view.layer renderInContext context UIImage img UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return img And call it like bellow.....

How do I create/render a UIImage from a 3D transformed UIImageView?

http://stackoverflow.com/questions/1949003/how-do-i-create-render-a-uiimage-from-a-3d-transformed-uiimageview

newImageRef CGImageRef imageView.layer.contents UIImage image UIImage imageWithCGImage newImageRef FAIL docs for renderInContext states that it does not render 3D transforms UIGraphicsBeginImageContext imageView.image.size imageView.layer renderInContext.. states that it does not render 3D transforms UIGraphicsBeginImageContext imageView.image.size imageView.layer renderInContext UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext header #import.. transform3D UIImage captureView UIImageView view UIGraphicsBeginImageContext view.frame.size view.layer renderInContext UIGraphicsGetCurrentContext UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return..

How to take a screenshot programmatically

http://stackoverflow.com/questions/2200736/how-to-take-a-screenshot-programmatically

library iphone share improve this question UIGraphicsBeginImageContext self.window.bounds.size self.window.layer renderInContext UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data..

How Do I Take a Screen Shot of a UIView?

http://stackoverflow.com/questions/2214957/how-do-i-take-a-screen-shot-of-a-uiview

Thanks in advance. iphone objective c uiview uiimage screenshot share improve this question I think you may want renderInContext not drawInContext . drawInContext is more a method you would override... Note that it may not work in all views specifically..

Get a PDF/PNG as output from a UIWebView or UIView

http://stackoverflow.com/questions/2454309/get-a-pdf-png-as-output-from-a-uiwebview-or-uiview

CGPDFContextBeginPage ctx NULL CGContextScaleCTM ctx 1 1 CGContextTranslateCTM ctx 0 mediaBox.size.height self.layer renderInContext ctx CGPDFContextEndPage ctx CFRelease ctx @end Bad news UIWebView does not create nice shapes and text in the PDF but renders..

UIImage from CALayer - iPhone SDK

http://stackoverflow.com/questions/3454356/uiimage-from-calayer-iphone-sdk

create a category on CALayer. UIImage imageFromLayer CALayer layer UIGraphicsBeginImageContext layer frame .size layer renderInContext UIGraphicsGetCurrentContext UIImage outputImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return..

Getting a screenshot of a UIScrollView, including offscreen parts

http://stackoverflow.com/questions/3539717/getting-a-screenshot-of-a-uiscrollview-including-offscreen-parts

void takeScreenshot CGRect contextRect CGRectMake 0 0 768 1004 UIGraphicsBeginImageContext contextRect.size self.layer renderInContext UIGraphicsGetCurrentContext UIImage viewImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext do something.. _scrollView.frame CGRectMake 0 0 _scrollView.contentSize.width _scrollView.contentSize.height _scrollView.layer renderInContext UIGraphicsGetCurrentContext image UIGraphicsGetImageFromCurrentImageContext _scrollView.contentOffset savedContentOffset..

Saving UIView contents in iOS 4 with real size of the images inside (i.e. scale contentes up for save)

http://stackoverflow.com/questions/4213529/saving-uiview-contents-in-ios-4-with-real-size-of-the-images-inside-i-e-scale

self.frame.size NO 0.0 else UIGraphicsBeginImageContext self.frame.size self.layer renderInContext UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return image..

How to capture UIView to UIImage without loss of quality on retina display

http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display

know a solution for my issue UIImage imageWithView UIView view UIGraphicsBeginImageContext view.bounds.size view.layer renderInContext UIGraphicsGetCurrentContext UIImage img UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return img .. UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions view.bounds.size view.opaque 0.0 view.layer renderInContext UIGraphicsGetCurrentContext UIImage img UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return img ..