我正试图使用iOS6 Facebook功能将屏幕截图从我的应用程序导出到Facebook。按下按钮时,如何显示应用程序中的选项?
下面是我当前的代码。我想截图,同时使用iOS6的Facebook功能导出到Facebook。
- (IBAction)export1:(id)sender{
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView scrollToRowAtIndexPath:indexPath
atScrollPosition:UITableViewScrollPositionTop
animated:YES];
exporting.hidden=YES;
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
CGRect contentRectToCrop = CGRectMake(0, 70, 740, 740);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], contentRectToCrop);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(croppedImage, nil, nil, nil);
以下是如何使用iOS6中内置的Facebook SDK轻松将图像发布到Facebook。如果这对你有任何帮助,我会很高兴。快乐编码:)
苹果开发者网站提供了一个新的Social.framework,用于集成Twitter和Facebook等社交体验。
请参阅此处。
@Clarence我认为你应该看看最新的iOS Facebook SDK
它还有一些关于如何在iOS 6中在facebook上发布图片的教程。
只需下载SDK,您就会在Documents文件夹中找到示例代码,其中包括一个示例HelloFacebookSample,它显示了如何在iOS 6中在facebook上发布图像。
你只需要用这种方法传递你的图像对象-
[FBNativeDialogs presentShareDialogModallyFrom:self initialText:nil image:croppedImage url:nil handler:nil];
在使用上述方法之前,您需要正确地遵循v3.1的安装说明。