如何动画UIButton背景颜色

Question

我想将UIButton背景颜色从黑色更改为白色.但我想在动画中改变它.例如......黑色>灰色>白色.在iPhone SDK中有没有简单的方法？谢谢.

Answer 1

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 300, 50)];
    [button setTitle:@"hi" forState:UIControlStateNormal];
    [button setBackgroundColor:[UIColor blackColor]];
    [self.view addSubview:button];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2.5];
    button.backgroundColor = [UIColor whiteColor];
    [UIView commitAnimations];