Question

I’m newbie at iOS development and this is my first question on SO.

I want to create “animation”.

When I tap UIButton I want to slowely (about 0.5 seconds) move it down for 10px and when I raise my finger I want to open new viewController.

I made something but I don’t know how to make “animation”.

    UIImage *normalImage = [UIImage imageNamed:@"FirstImage"];        
    UIButton *firstButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    firstButton.frame = CGRectMake(31, 194, normalImage.size.width, normalImage.size.height);
    [firstButton setImage:normalImage forState:UIControlStateNormal];
    [firstButton addTarget:self action:@selector(showSecondViewController) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:firstButton];


- (void)showSecondViewController; {
    SecondViewController *secondViewController = [[SecondViewController alloc] init];
    secondViewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentModalViewController:secondViewController animated:YES];
    [progressViewController release]; 
}

Answer 1

[UIView animateWithDuration:(NSTimeInterval)duration animations:^(void) {
    //put your animation result here
    //then it will do animation for you
} completion:^(BOOL finished){
    //do what you need to do after animation complete
}];

for example:

UIButton *firstButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

//add firstButton to some view~
//....

firstButton.transform = CGAffineTransformIdentity;
[UIView animateWithDuration:0.5 animations:^(void) {
    firstButton.transform = CGAffineTransformMakeTranslation(0,10);
} completion:^(BOOL finished){
    show your view controller~
}];