/**

* 截取当前屏幕 并修改

*

* @return NSData **/

- (UIImage *)imageWithScreenshot

{

CGSize imageSize=CGSizeZero;

UIInterfaceOrientation orientation=[UIApplication sharedApplication].statusBarOrientation;if(UIInterfaceOrientationIsPortrait(orientation))

imageSize=[UIScreen mainScreen].bounds.size;elseimageSize=CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);

UIGraphicsBeginImageContextWithOptions(imageSize, NO,0);

CGContextRef context=UIGraphicsGetCurrentContext();for (UIWindow *window in[[UIApplication sharedApplication] windows])

{

CGContextSaveGState(context);

CGContextTranslateCTM(context, window.center.x, window.center.y);

CGContextConcatCTM(context, window.transform);

CGContextTranslateCTM(context,-window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height *window.layer.anchorPoint.y);if (orientation ==UIInterfaceOrientationLandscapeLeft)

{

CGContextRotateCTM(context, M_PI_2);

CGContextTranslateCTM(context,0, -imageSize.width);

}else if (orientation ==UIInterfaceOrientationLandscapeRight)

{

CGContextRotateCTM(context,-M_PI_2);

CGContextTranslateCTM(context,-imageSize.height, 0);

}else if (orientation ==UIInterfaceOrientationPortraitUpsideDown) {

CGContextRotateCTM(context, M_PI);

CGContextTranslateCTM(context,-imageSize.width, -imageSize.height);

}if([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)])

{

[window drawViewHierarchyInRect:window.bounds afterScreenUpdates:YES];

}else{

[window.layer renderInContext:context];

}

CGContextRestoreGState(context);

}

UIImage*image =UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();//修改图片

NSData *imageData =UIImagePNGRepresentation(image);

UIImage*LastImage =[UIImage imageWithData:imageData];

UIImage*img = [UIImage imageNamed:@"ico_nursery.png"];

CGImageRef imgRef=img.CGImage;

CGFloat w=CGImageGetWidth(imgRef);

CGFloat h=CGImageGetHeight(imgRef);//以1.png的图大小为底图

UIImage *img1 =LastImage;

CGImageRef imgRef1=img1.CGImage;

CGFloat w1=CGImageGetWidth(imgRef1);

CGFloat h1=CGImageGetHeight(imgRef1);//以1.png的图大小为画布创建上下文

UIGraphicsBeginImageContext(CGSizeMake(w1, h1 + 100));

[img1 drawInRect:CGRectMake(0, 0, w1, h1)];//先把1.png 画到上下文中

[img drawInRect:CGRectMake(10, h1 + 10, 80, 80)];//再把小图放在上下文中

UIImage *resultImg = UIGraphicsGetImageFromCurrentImageContext();//从当前上下文中获得最终图片

UIGraphicsEndImageContext();//关闭上下文

returnresultImg;

}