zapsleep

- (UIImage *)blurryImage:(UIImage *)image withBlurLevel:(CGFloat)blur {
    if (blur < 0.f || blur > 1.f) {
        blur = 0.5f;
    }
    int boxSize = (int)(blur * 100);
    boxSize = boxSize - (boxSize % 2) + 1;
    
    CGImageRef img = image.CGImage;
    
    vImage_Buffer inBuffer, outBuffer;

zapsleep

- (UIImage *)blurryGPUImage:(UIImage *)image 
              withBlurLevel:(NSInteger)blur {
    GPUImageFastBlurFilter *blurFilter = 
                        [[GPUImageFastBlurFilter alloc] init];
    blurFilter.blurSize = blur;
    UIImage *result = [blurFilter imageByFilteringImage:image];
    return result;
}

zapsleep

- (UIImage *)blurryImage:(UIImage *)image 
           withBlurLevel:(CGFloat)blur {
    CIImage *inputImage = [CIImage imageWithCGImage:image.CGImage];
    CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"
                         keysAndValues:kCIInputImageKey, inputImage,
                                       @"inputRadius", @(blur), 
                                       nil];
    
    CIImage *outputImage = filter.outputImage;
    

zapsleep

DVPlaylistPlayer *player = [[DVPlaylistPlayer alloc] init];
[self.view addSubview:player.playerView];
player.delegate = someDelegate;
player.dataSource = someDataSource;

[player playMediaAtIndex:0];

zapsleep

#import "DVViewController.h"
#import <CoreMotion/CoreMotion.h>

#define kCMDeviceMotionUpdateFrequency (1.f/30.f)

@interface DVViewController ()
@property (weak, nonatomic) IBOutlet UILabel *accelerationXVal;
@property (weak, nonatomic) IBOutlet UILabel *accelerationYVal;
@property (weak, nonatomic) IBOutlet UILabel *accelerationZVal;

zapsleep

- (void)updateMotionData {
    //1
    CMAcceleration acceleration = self.motionManager.deviceMotion.userAcceleration;
    self.accelerationXVal.text = [NSString stringWithFormat:@"%.3f", acceleration.x];
    self.accelerationYVal.text = [NSString stringWithFormat:@"%.3f", acceleration.y];
    self.accelerationZVal.text = [NSString stringWithFormat:@"%.3f", acceleration.z];
    //

    //2
    CMAcceleration gravity = self.motionManager.deviceMotion.gravity;

zapsleep

#import <UIKit/UIKit.h>

@interface DVParallaxView : UIView

@property (nonatomic, strong) UIImage *backgroundImage;
@property (nonatomic, strong) UIView *frontView;
@property (nonatomic) float parallaxDistanceFactor;
@property (nonatomic) float parallaxFrontFactor;
@property (nonatomic) CGPoint contentOffset;

zapsleep

@interface DVParallaxView()
@property (nonatomic, strong) UIImageView *backgroundImageView;
@end

zapsleep

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.parallaxDistanceFactor = 2.f;
        self.parallaxFrontFactor = 20.f;
        self.backgroundColor = [UIColor clearColor];
        [self addSubview:self.backgroundImageView];
        
        UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panHandler:)];

zapsleep

#pragma mark - Gesture handler

- (void)panHandler:(UIPanGestureRecognizer *)pan {
    CGPoint translation = [pan translationInView:self];
    [self setContentOffset:CGPointMake(self.contentOffset.x + translation.x,
                                       self.contentOffset.y - translation.y)];
    
    [pan setTranslation:CGPointZero inView:self];
}