zmcartor

- (void)scrollViewDoubleTapped:(UITapGestureRecognizer*)recognizer {
    // 1
    CGPoint pointInView = [recognizer locationInView:self.imageView];
 
    // 2
    CGFloat newZoomScale = self.scrollView.zoomScale * 1.5f;
    newZoomScale = MIN(newZoomScale, self.scrollView.maximumZoomScale);
 
    // 3
    CGSize scrollViewSize = self.scrollView.bounds.size;

zmcartor

// Can also be placed within scrollviews layoutSubviews

- (void)centerScrollViewContents {
    CGSize boundsSize = self.scrollView.bounds.size;
    CGRect contentsFrame = self.imageView.frame;
 
    if (contentsFrame.size.width < boundsSize.width) {
        contentsFrame.origin.x = (boundsSize.width - contentsFrame.size.width) / 2.0f;
    } else {
        contentsFrame.origin.x = 0.0f;

zmcartor

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
    CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView.superview];
    
    if(translation.y > 0)
    {
        NSLog(@"dragging downwards!");
    } else
    {
        NSLog(@"dragging up!");
    }

zmcartor

UIBlurEffect *blur =[UIBlurEffecteffectWithStyle:UIBlurEffectStyleDark]; 
UIVisualEffectView *blurView = [[UIVisualEffectView alloc] initWithEffect:blur]; 
blurView.frame = self.hudView.bounds; 
[self.view addSubview:blurView];

zmcartor

UIVisualEffectView *vibrantView = [[UIVisualEffectView alloc] initWithEffect:[UIVibrancyEffect effectForBlurEffect:blur]]; vibrantView.frame = blurView.bounds; 
UILabel *label = [[UILabel alloc] init]; 
[label setFont:[UIFont fontWithName:@"HelveticaNeue" size:33]]; label.frame = CGRectMake(8, 30, 400, 500); 
label.numberOfLines = 0; 
label.text = @"THIS IS VIBRANT TEXT!"; 

// add vibrantView to first blurView
[vibrantView.contentView addSubview:label];
[blurView.contentView addSubview:vibrantView];

zmcartor

import XCPlayground
import AudioKit

let osc = AKWhiteNoise()
let filter = AKLowPassFilter(osc, cutoffFrequency: 200, resonance: 3)
osc.start()

let verb = AKReverb(filter)
verb.dryWetMix = 0.5

zmcartor

hello() { name in 

... some code ...

	anotherMethod { anotherThing in 
			.. I'm nested in two closures
		}
}

zmcartor

func unwrap<T:Any>(dictionary:[String : AnyObject], key:String, defaultValue:T) -> T {
        let value = dictionary[key] as? T ?? defaultValue
        return value as T
    }


// Can be curried inside a init?(json:NSDictionary) function 

        let stringAtKey:(String) -> String = { key in
            return unwrap(dictionary , key:key, defaultValue:"")

zmcartor

+ (BOOL)resolveInstanceMethod:(SEL)aSEL {
    NSString *classname = NSStringFromClass([self class]);
    NSString *selectorString = [NSString stringWithFormat:@"insaneInstance%@",classname];
    SEL ourSelector = NSSelectorFromString(selectorString);
    if (aSEL == ourSelector) {
        class_addMethod([self class], aSEL, (IMP)insaneInstanceMethod, "v@:");
        return YES;
    }
    return [super resolveInstanceMethod:aSEL];
}

zmcartor

+ (BOOL)resolveClassMethod:(SEL)name {
    NSString *classname = NSStringFromClass([self class]);
    NSString *selectorString = [NSString stringWithFormat:@"crazyClass%@",classname];
    NSLog(@"string is %@", selectorString);
    SEL ourSelector = NSSelectorFromString(selectorString);
    
    if (name == ourSelector) {
        // adding class method to meta-class
        Class ourClass = object_getClass(NSClassFromString(classname));
        class_addMethod(ourClass, ourSelector, (IMP)crazyClassMethod, "@v:@");