Question

我正在尝试使用iOS6 Facebook功能将我的应用程序的屏幕截图导出到Facebook。按下按钮时，如何在应用程序内部显示选项？

以下是我目前的代码。我想截取屏幕截图，同时使用iOS6 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);

Answer 1

Here是如何使用iOS6中内置的Facebook SDK轻松地将图像发布到Facebook。如果这对您有任何帮助，请感到高兴。快乐的编码：）

Answer 2

Apple开发者网站提供了一个新的Social.framework，用于整合Twitter和Facebook等社交体验。

参考here。

Answer 3

@Clarence我认为你应该查看最新的Facebook SDK for iOS

它还有一些关于如何在iOS 6中在Facebook上发布图像的教程。

只需下载SDK，您就可以在Documents文件夹中找到示例代码，其中包含示例HelloFacebookSample，其中显示了如何在iOS 6中的Facebook上发布图像。

你只需要在这个方法中传递你的图像对象 -

[FBNativeDialogs presentShareDialogModallyFrom:self initialText:nil image:croppedImage url:nil handler:nil];

在使用上述方法之前，您需要正确遵循v 3.1安装说明here

集成iOS6 facebook功能

3 个答案: