Question

我是iOS开发的新手，这是我关于SO的第一个问题。

我想创建“动画”。

当我点击UIButton时，我想慢慢地（约0.5秒）向下移动10px，当我举起手指时，我想打开新的viewController。

我做了某事，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~
}];

Answer 2

[UIView animateWithDuration:0.5 animations: ^ {
  button.frame = CGRectMake:(button.frame.origin.x, button.frame.origin.y + 10.0f, button.frame.size.width, button.frame.size.height);
}];

Answer 3

您可以在beginAnimations和commitAnimations块之间进行转换（重新定位），缩放和旋转，您可以在其中指定AnimationRepeatCount，AnimationCurve等。

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelay:0.5];
[UIView setAnimationDuration:1];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];

[UIView setAnimationRepeatAutoreverses:YES];
[UIView setAnimationRepeatCount:2];
..........................//etc.

firstButton.frame = CGRectMake(31, 194, normalImage.size.width, normalImage.size.height);
[UIView commitAnimations];

但在iOS4及以后版本中，鼓励动画由

执行

animateWithDuration：delay：options：animations：compeletion和类似的方法，它们可以激活非常强大的块。有关块动画的更多信息，请参阅Apple文档

向下移动UIButton 10px并打开新的ViewController

3 个答案: