key value observing

UIViewController.m 파일 안에서

// register observer

    void *context = (__bridge void *)self;

    [self.tableView addObserver:self

                     forKeyPath:@"contentOffset"

                        options:NSKeyValueObservingOptionNew

                        context:context];

#pragma mark - KVO Methods

- (void)observeValueForKeyPath:(NSString *)keyPath

                      ofObject:(id)object

                        change:(NSDictionary *)change

                       context:(void *)context

{

// Make sure we are observing this value.

if (context != (__bridge void *)self) {

[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];

return;

}

    

    if ((object == self.tableView) &&

        ([keyPath isEqualToString:@"contentOffset"] == YES)) {

        [self scrollViewDidScrollWithOffset:self.tableView.contentOffset.y];

    }

}

- (void)scrollViewDidScrollWithOffset:(CGFloat)scrollOffset

{

     // do something

}

storyboard 밖에서 storyboard 리소스 호출하기.

MyController is in storyboard.

and

some place in a separate view controller :

  

MyController *controller =

    [[UIStoryboard storyboardWithName:@"Main_iPhone"

                               bundle:NULL] instantiateViewControllerWithIdentifier:@"MyViewController"];

    

[self.navigationController pushViewController:controller animated:YES];

xib 소스에서 storyboard 에 있는 viewcontroller 생성하기

OutUIViewController.xib
OutUIViewController.m
OutUIViewController.h


InUIViewController.m  InUIViewController.h   in Main_

hexa 값으로 컬러값 한번에 설정

RGB hexa 값(0xfffefa)으로 RGB값 설정 예제)

    unsigned rgbValue = 0xfffefa;

    UIColor *bgColor = [UIColor colorWithRed:((rgbValue & 0xFF0000) >> 16)/255.0

                                       green:((rgbValue & 0xFF00) >> 8)/255.0

                                        blue:(rgbValue & 0xFF)/255.0 alpha:1.0];

    [myView setBackgroundColor:bgColor];

Animation 2

방법 1)

    [UIView beginAnimations:nil context:nil];

    [UIView setAnimationDuration:0.5];

    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight

                           forView:newView

                             cache:YES];

    [containerView setHidden:NO];

    [containerView addSubview:newView];

    [UIView commitAnimations];

방법 2)

    [UIView transitionWithView: containerView duration:0.5

                       options:UIViewAnimationOptionCurveEaseInOut 

                    animations:^ {

                        [containerView addSubview:newView];

                    } completion:nil];

방법 3)

CATransition *animation = [CATransition animation];

[animation setDuration:0.2];

[animation setType:kCATransitionMoveIn];

[animation setSubtype:kCATransitionFromRight];

    [newView.layer addAnimation:animation forKey:nil];

    [containerView addSubview:newView];

remove subview

CATransition *animation = [CATransition animation];

            [animation setDuration:0.5];

            [animation setType:kCATransitionReveal];

            [animation setSubtype:kCATransitionFromLeft];

            [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];

            [[_refMenuContainerView layer] addAnimation:animation forKey:@"SlideView"]; //@"SwitchToNewView" , kCATransition ,,,,

            

            [subview removeFromSuperview];

UINavigationController 에서 뒤로(BACK) 두번 하기 (Pop)

popToViewController를 사용 하면 됨.

int viewControllerStackCount = self.navigationController.viewControllers.count;

    [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:(viewControllerStackCount-3)] animated:YES];

Animation

1. UINavigationController에 present & dismiss animation 적용

////// presentedViewController animation

CATransition* transition = [CATransition animation];

    transition.duration = 0.5;

    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    transition.type = kCATransitionMoveIn;

    transition.subtype = kCATransitionFromTop;

    [self.navigationController.view.layer addAnimation:transition forKey:kCATransition];

    

    BoolshelfSubViewController *controller= [self.storyboard instantiateViewControllerWithIdentifier:@"BoolshelfSubViewController"];

    [self.navigationController pushViewController:controller animated:NO];

   

////// dismissViewControllerAnimated animation

CATransition* transition = [CATransition animation];
    transition.duration = 0.5;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionReveal;
    transition.subtype = kCATransitionFromBottom;
    [self.navigationController.view.layer addAnimation:transition forKey:nil];

    [[self navigationController] popViewControllerAnimated:NO];

2.  UIView를 이용한 animation 적용

[UIView beginAnimations:@"animation" context:nil];

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.navigationController.view cache:NO];

[UIView setAnimationDuration:0.7];

[self.navigationController pushViewController:pageViewController animated:NO];

pageViewController = nil;

    

[UIView commitAnimations];

3. UIView Layer에 animation 적용 

CATransition *animation = [CATransition animation];

[animation setDuration:0.2];

[animation setType:kCATransitionMoveIn];

[animation setSubtype:kCATransitionFromRight];

    [menuView.layer addAnimation:animation forKey:nil];

    [_menuContainerView addSubview:menuView];