iphone - 将 UIButton 向下移动 10px 并打开新的 ViewController

Question

我是 iOS 开发的新手，这是我关于 SO 的第一个问题。

我想制作“动画”。

当我点击 UIButton 时，我想慢慢地(大约 0.5 秒)将它向下移动 10px，当我抬起手指时，我想打开新的 viewController。

我制作了东西，但我不知道如何制作“动画”。

    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
}];

例如:

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~
}];