完整截屏

来源：互联网发布：易知投资待遇编辑：程序博客网时间：2024/05/19 22:05

终于找到了个完整的截屏代码,之前的截屏代码有个问题,当在图上面画东西的时候,新画上的不会被截入图片.那是因为layer问题,这下找了个好用的.

CGImageRef UIGetScreenImage();

void SaveScreenImage(NSString *path)

{

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

CGImageRef cgImage = UIGetScreenImage();

void *imageBytes = NULL;

if (cgImage == NULL) {

CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();

imageBytes = malloc(320 * 480 * 4);

CGContextRef context = CGBitmapContextCreate(imageBytes, 320, 480, 8, 320 * 4, colorspace, kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Big);

CGColorSpaceRelease(colorspace);

for (UIWindow *window in [[UIApplication sharedApplication] windows]) {

CGRect bounds = [window bounds];

CALayer *layer = [window layer];

CGContextSaveGState(context);

if ([layer contentsAreFlipped]) {

CGContextTranslateCTM(context, 0.0f, bounds.size.height);

CGContextScaleCTM(context, 1.0f, -1.0f);

}

[layer renderInContext:(CGContextRef)context];

CGContextRestoreGState(context);

}

cgImage = CGBitmapContextCreateImage(context);

CGContextRelease(context);

}

NSData *pngData = UIImagePNGRepresentation([UIImage imageWithCGImage:cgImage]);

CGImageRelease(cgImage);

if (imageBytes)

free(imageBytes);

[pngData writeToFile:path atomically:YES];

[pool release];

}

但是请注意:
The private UIGetScreenImage(void) API can be used to capture the contents of the screen:

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