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NSLog(@"### FB SDK VERSION : %@", [[FBRequestConnection class] performSelector:@selector(userAgent)]);

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    self.gestureRecognizer   = [[UITapGestureRecognizer alloc]
                                             initWithTarget:self action:@selector(handleTap:)];
    self.gestureRecognizer.numberOfTapsRequired = 1;
    [self.view addGestureRecognizer:self.gestureRecognizer];
    self.gestureRecognizer.cancelsTouchesInView = NO;
    
    -(void)handleTap:(UITapGestureRecognizer *)recognizer
{
    CGPoint translatedPoint = [recognizer locationInView:self.view];

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-(void)setEmailFieldBold:(BOOL)bold animated:(BOOL)animated
{
    CGFloat fontSize = self.emailTextField.font.pointSize;
    
    void (^setBold)(void) = ^{
        self.emailTextField.font = (bold) ? [UIFont QRBoldFontWithSize:fontSize]
        : [UIFont QRRegularFontWithSize:fontSize];
    };
 

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- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
	_editing = editing;
	self.textField.enabled = !_editing;
	
	void (^change)(void) = ^{		
		_textField.alpha = _editing ? 0.0f : 1.0f;
		_renameListButton.alpha = _editing ? 1.0f : 0.0f;
		if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
			if (self.frame.size.width < 500.0f) {
				_archiveTasksButton.alpha = _renameListButton.alpha;

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 // hide shadow
 
 id navBarAppearance = [UINavigationBar appearance];
    [navBarAppearance setBackgroundImage:[UIImage new] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];
    [navBarAppearance setShadowImage:[UIImage new]];
    
    //custom title
    
    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont 
    fontWithName:@"YOURFONT" size:14], NSFontAttributeName, 

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NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"sample" ofType:@"html"];
NSString* htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
[webView loadHTMLString:htmlString baseURL:nil];

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- (void)loadView
{ 
[super loadView];

NSArray *nib =[[NSBundle mainBundle]loadNibNamed:@"test" owner:self options:nil];
self.view = [nib objectAtIndex:0];
}  

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	//int
	int min = 0;
	int max = 1;
  int i = (arc4random()%(max-min+1))+min; 
  
  //BOOL
  BOOL i = (arc4random()%(2));

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//More Basic

    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = self.view.bounds;
    gradient.colors = @[(id)[[UIColor blackColor] CGColor],
                        (id)[[UIColor whiteColor] CGColor]];
    [self.view.layer insertSublayer:gradient atIndex:0];

//More Advanced
+ (void)addLinearGradientToView:(UIView *)theView withColor:(UIColor *)theColor transparentToOpaque:(BOOL)transparentToOpaque

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//I created a typedef for a block:

typedef void (^animationCompletionBlock)(void);

// And a key that I use to add a block to an animation:
#define kAnimationCompletionBlock @"animationCompletionBlock"

// Then, if I want to run animation completion code after a CAAnimation finishes, I set myself as the delegate of the animation, and add a block of code to the animation using setValue:forKey:
animationCompletionBlock theBlock = ^void(void)
{