Locale Date String from Time Interval

 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateStyle:NSDateFormatterShortStyle];
    [dateFormatter setTimeStyle:NSDateFormatterShortStyle];
    [dateFormatter setLocale:[NSLocale currentLocale]];
 NSString *dateString = [dateFormatter stringFromDate:[NSDate dateWithTimeIntervalSince1970:sometimeInterval]];

Taking screenshot programmatically in iOS 7

UIScreen *screen = [UIScreen mainScreen] ;
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
UIView *view = [screen snapshotViewAfterScreenUpdates:YES];
UIGraphicsBeginImageContextWithOptions(screen.bounds.size, NO, 0);
[keyWindow drawViewHierarchyInRect:keyWindow.bounds afterScreenUpdates:YES];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *data= UIImagePNGRepresentation(image);
[data writeToFile:[NSString stringWithFormat:@"%@/ScreenShot.png",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]] atomically:YES];

Show text on status bar

-(void)showStatusBarMessage:(NSString *)message hideAfter:(NSTimeInterval)delay
{
    __block UIWindow *statusWindow = [[UIWindow alloc] initWithFrame:[UIApplication sharedApplication].statusBarFrame];
    statusWindow.windowLevel = UIWindowLevelStatusBar + 1;
    UILabel *label = [[UILabel alloc] initWithFrame:statusWindow.bounds];
    label.textAlignment = UITextAlignmentCenter;
    label.backgroundColor = [UIColor blackColor];
    label.textColor = [UIColor grayColor];
    label.font = [UIFont boldSystemFontOfSize:13];
    label.text = message;
    [statusWindow addSubview:label];
    [statusWindow makeKeyAndVisible];
    label.layer.transform = CATransform3DMakeRotation(M_PI * 0.5, 1, 0, 0);
    [UIView animateWithDuration:0.7 animations:^{
        label.layer.transform = CATransform3DIdentity;
    }completion:^(BOOL finished){
        double delayInSeconds = delay;
        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
        dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
            [UIView animateWithDuration:0.5 animations:^{
                label.layer.transform = CATransform3DMakeRotation(M_PI * 0.5, -1, 0, 0);
            }completion:^(BOOL finished){
                statusWindow = nil;
                [[[UIApplication sharedApplication].delegate window] makeKeyAndVisible];
            }];
        });
    }];
}

Reload UITableView with animation

[tableView reloadData];
CATransition *animation = [CATransition animation];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromBottom];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[animation setFillMode:kCAFillModeBoth];
[animation setDuration:.3];
[[tableView layer] addAnimation:animation forKey:@"UITableViewReloadDataAnimationKey"];    

Checking for iPad or iPhone

if ([[UIDevice currentDevice].model rangeOfString:@"iPad"].location!=NSNotFound)
    {
        //ipad
    }
    else
    {
       //iphone
    }

IOS UIButtion with animated gif Image

UIImageView* animatedImageView = [[UIImageView alloc] initWithFrame:self.view.bounds];
animatedImageView.animationImages = [NSArray arrayWithObjects:    
                               [UIImage imageNamed:@"image1.png"],
                               [UIImage imageNamed:@"image2.png"],
                               [UIImage imageNamed:@"image3.png"],
                               [UIImage imageNamed:@"image4.png"], nil];
animatedImageView.animationDuration = 1.0f;
animatedImageView.animationRepeatCount = 0;
[animatedImageView startAnimating];
[yourButton addSubview: animatedImageView];

JSON string From NSDictionary

NSDictionary *jsondict;

NSData *jsonData=[NSJSONSerialization dataWithJSONObject:jsondict options:NSJSONWritingPrettyPrinted error:Nil];

NSString *jsonStr=[[NSString alloc]initWithData: jsonData encoding:NSUTF8StringEncoding];


 jsonStr =[jsonStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];