调整应用截图的大小

我有特定区域截图的问题。 我有一个在底部的标签栏和顶部的工具栏。 我想截取这两个栏之间的屏幕截图。 以下是我的代码。 我怎样才能改善我的代码来裁剪吧？

谢谢

CGSize imageSize = [[UIScreen mainScreen] bounds].size; if (NULL != UIGraphicsBeginImageContextWithOptions) UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0); else UIGraphicsBeginImageContext(imageSize); CGContextRef context = UIGraphicsGetCurrentContext(); // Iterate over every window from back to front for (UIWindow *window in [[UIApplication sharedApplication] windows]) { if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen]) { // -renderInContext: renders in the coordinate space of the layer, // so we must first apply the layer's geometry to the graphics context CGContextSaveGState(context); // Center the context around the window's anchor point CGContextTranslateCTM(context, [window center].x, [window center].y); // Apply the window's transform about the anchor point CGContextConcatCTM(context, [window transform]); // Offset by the portion of the bounds left of and above the anchor point CGContextTranslateCTM(context, -[window bounds].size.width * [[window layer] anchorPoint].x, -[window bounds].size.height * [[window layer] anchorPoint].y); // Render the layer hierarchy to the current context [[window layer] renderInContext:context]; // Restore the context CGContextRestoreGState(context); } } // Retrieve the screenshot image UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(image, self, @selector(imageSavedToPhotosAlbum: didFinishSavingWithError: contextInfo:), nil); 

Answer 1

我想你可以尝试在创build最终的UIImage后裁剪出你需要的部分。

 CGRect contentRectToCrop = CGRectMake(0, 44, 320, 392); UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], contentRectToCrop); UIImage *croppedImage = [UIImage imageWithCGImage:imageRef]; 

Answer 2

未经testing的消声：

 imageSize.origin.y+=44; //toolbar size imageSize.size.height-=88; //tabbar+toolbar size