Getting username and profile picture from Facebook iOS 7

This is the simplest way I’ve found to get the user’s profile picture. [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *FBuser, NSError *error) { if (error) { // Handle error } else { NSString *userName = [FBuser name]; NSString *userImageURL = [NSString stringWithFormat:@””, [FBuser objectID]]; } }]; Other query parameters that can be used are: type: small, … Read more

table header view height is wrong when using auto layout, IB, and font sizes

Note: A Swift 3+ version can be found here: The idea is to calculate header’s height with help of systemLayoutSizeFittingSize:targetSize. Returns the size of the view that satisfies the constraints it holds. Determines the best size of the view considering all constraints it holds and those of its subviews. After changing header’s height it … Read more

How do I use the metadataOutputRectOfInterestForRect method and rectOfInterest property to scan a specific area? (QR Code)

I wasn’t really able to clarify the issue with metadataOutputRectOfInterestForRect, however, you can directly set the property as well. You need to the have the resolution in width and height of your video, which you can specify in advance. I quickly used the 640*480 setting. As stated in the documentation, these values have to be … Read more

Warning: UICollectionViewFlowLayout has cached frame mismatch for index path ‘abc’

This is likely occurring because the flow layout “xyz” is modifying attributes returned by UICollectionViewFlowLayout without copying them And sure enough, that’s just what you are doing: private override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? { let attributes = super.layoutAttributesForItemAtIndexPath(indexPath) let distance = CGRectGetMidX(attributes!.frame) – self.midX; var transform = CATransform3DIdentity; transform = CATransform3DTranslate(transform, -distance, 0, -self.width); … Read more

Xcode freezes on startup while loading project

Check out this: (quoted from here) Restore sanity by not restoring Thanks to Lion’s Restore feature, all the windows you left open in a given application remain open when you relaunch it. That’s awesomely helpful in a Web browser or a text editor. In certain apps, however—particularly those where you rarely need to revisit the … Read more