如何从字节码获取UIImage ...在iPhone代码上 [英] How to get UIImage from Byte...at IPhone code

问题描述

我通过下一个代码从UIImage获得了字节数组。

I got byte array from UIImage by next code..

context = CGBitmapContextCreate(    (void*) pixelData,
                                inImage.size.width,
                                inImage.size.height,
                                RGBA_8_BIT,
                                bytesPerRow,
                                colorSpace,
                                kCGImageAlphaPremultipliedLast );

//  Make sure we have our context   
if ( ! context )    
{
    free( pixelData );
    NSLog( @"Context not created!" );
}


//  Draw the image to the bitmap context.   
//  The memory allocated for the context for rendering will then contain the raw image pixelData in the specified color space.
CGRect rect = {     { 0 , 0 }, { inImage.size.width, inImage.size.height }        };
CGContextDrawImage( context, rect, inImage.CGImage );

// Now we can get a pointer to the image pixelData associated with the bitmap context.
pixelData = (RGBAPixel*) CGBitmapContextGetData( context );

现在。我想要UIImage来自 pixelData ...帮助..

Now.. I want UIImage from "pixelData"... help..

RGBAPixel是一个结构...
->整数红色；浅绿色浅蓝色int alpha;

RGBAPixel is a struct... --> int red; int green; int blue; int alpha;

推荐答案

以下是我从上下文中获取UIImage的方法。

The following is the way I get a UIImage from context.

CGImageRef aCGImg = CGBitmapContextCreateImage(context);
UIImage *aUIImg = [UIImage imageWithCGImage:aCGImg];
CGImageRelease(aCGImg);

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