dreampowder

NSArray *albums = @[[Album albumWithName:@"Random Access Memories" price:9.99f],
          [Album albumWithName:@"Clarity" price:6.99f],
          [Album albumWithName:@"Weekend in America" price:7.99f],
          [Album albumWithName:@"Weekend in America" price:7.90f],
          [Album albumWithName:@"Bangarang EP" price:2.99f]];

// Reversing an Array
__unused NSArray *reversed = albums.reverseObjectEnumerator.allObjects;

// PREDICATES

dreampowder

tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
Or to dismiss when touch

tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

dreampowder

- (void)animateRefreshButton:(BOOL)willAnimate{
    if (willAnimate) {
        [self.btnRefresh setEnabled:NO];
        
        CASpringAnimation* springRotation = [CASpringAnimation animationWithKeyPath:@"transform.rotation.z"];
        springRotation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/];
        springRotation.duration = 2.0f;
        springRotation.cumulative = YES;
        springRotation.repeatCount = INT_MAX;
        springRotation.damping = 8;

dreampowder

#define NSLocalizedFormatString(fmt, ...) [NSString stringWithFormat:NSLocalizedString(fmt, nil), __VA_ARGS__]

dreampowder

+ (NSInteger)getDaysBetween:(NSDate*)dateBegin 
                   withDate:(NSDate*)dateEnd{
    NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *components = [gregorianCalendar components:NSDayCalendarUnit
                                                        fromDate:dateBegin
                                                          toDate:dateEnd
                                                         options:0];
    return [components day];
}

dreampowder

self.edgesForExtendedLayout = UIRectEdgeNone;

dreampowder

- (void)didMoveToParentViewController:(UIViewController *)parent
{
    // parent is nil if this view controller was removed
}

dreampowder

[aeiou] - matches exactly one lowercase vowel
[^aeiou] - matches a character that ISN'T a lowercase vowel (negated character class)
^[aeiou] - matches a lowercase vowel anchored at the beginning of the line
[^^] - matches a character that isn't a caret/'^'
^[^^] - matches a character that isn't a caret at the beginning of line
^[^.]. - matches anything but a literal period, followed by "any" character, at the beginning of line
[a-z] - matches exactly one character within the range of 'a' to 'z' (i.e. all lowercase letters)
[az-] - matches either an 'a', a 'z', or a '-' (literal dash)
[.*]* - matches a contiguous sequence (possibly empty) of dots and asterisks
[aeiou]{3} - matches 3 consecutive lowercase vowels (all not necessarily the same vowel)

dreampowder

#pragma mark - UICollectionView Datasource
// 1
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section {
    return 1;
}
// 2
- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView {
    return 1;
}