Air-Craft

    void (^doIt)(id retryBlk);
    @weakify(self);
    doIt = ^(id retryBlk){
        void (^retry)(id retryBlk) = retryBlk;
        retry(retryBlk);
    };
    doIt(doIt);

Air-Craft

    AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:self.recordedVideoFileURL options:nil];
    AVAssetImageGenerator *gen = [[AVAssetImageGenerator alloc] initWithAsset:asset];
    gen.appliesPreferredTrackTransform = YES;
    NSError *err = NULL;
    CMTime cmTime = CMTimeMake(time, 1);
    CGImageRef imgRef = [gen copyCGImageAtTime:cmTime actualTime:NULL error:&err];
    UIImage *img = [[UIImage alloc] initWithCGImage:imgRef];
    return img;

Air-Craft

[[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];

Air-Craft

button.imageEdgeInsets = UIEdgeInsetsMake(0., button.frame.size.width - (image.size.width + 15.), 0., 0.);
button.titleEdgeInsets = UIEdgeInsetsMake(0., 0., 0., image.size.width);

Air-Craft

// Context: A UILabel category/subclass.  Otherwise replace "self"...
- (instancetype)clonedVersionWithText:(NSString *)text
{
    // Warning: Not necessarily complete, but a good start ;)

    
    // Size & position
    UILabel *clonedLbl = [[UILabel alloc] initWithFrame:self.frame];
    
    // Text

Air-Craft

for (NSString* family in [UIFont familyNames])
    {
        NSLog(@"%@", family);
        
        for (NSString* name in [UIFont fontNamesForFamilyName: family])
        {
            NSLog(@"  %@", name);
        }
    }

Air-Craft

- (CGPoint)targetContentOffsetForProposedContentOffset:(CGPoint)proposedContentOffset withScrollingVelocity:(CGPoint)velocity
{
    // We're going to center the centermost item...
    
    // Use the bounds to have the snap happen the minute drag stops. In other words use the current content offset (which = bounds.origin) instead of the proposed end offset (which takes velocity into account)
    CGRect proposedRect = self.collectionView.bounds;
    
    CGFloat proposedContentOffsetCenterX = proposedContentOffset.x + self.collectionView.bounds.size.width * 0.5f;
    
    // Comment out if you want the collectionview simply stop at the center of an item while scrolling freely (ie take velocity into account)

Air-Craft

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
    const CGFloat DECEL = 500;     // pixels/second decrease in velocity per second.  need to guess this
    CGPoint vel = [self.panGestureRecognizer velocityInView:self.superview];
    
    if (vel.y > 0) return;
    
    CGFloat bottomEdge = scrollView.contentOffset.y + scrollView.frame.size.height;
    CGFloat distanceToBottom = scrollView.contentSize.height -bottomEdge;

Air-Craft

CGPoint scrollVelocity = [self.panGestureRecognizer velocityInView:self.superview];
if (scrollVelocity.y > 0.0f)
    NSLog(@"going down");
else if (scrollVelocity.y < 0.0f)
    NSLog(@"going up");

Air-Craft

extension Double {
    var km: Double { return self * 1_000.0 }
    var m: Double { return self }
    var cm: Double { return self / 100.0 }
    var mm: Double { return self / 1_000.0 }
    var ft: Double { return self / 3.28084 }
}
let oneInch = 25.4.mm
println("One inch is \(oneInch) meters")
// prints "One inch is 0.0254 meters"