贝吉纳动画:上下文:不使用颜色?

// FADES OUT OVER 1.5 Secs
- (IBAction)button_ONE:(id)sender {
    NSLog(@"FADE ALPHA");
    [textField_TOP_01 setAlpha:1.0];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.5];
    [textField_TOP_01 setAlpha:0.0];
    [UIView commitAnimations];
}

.

// IMMEDIATELY CHANGES TO BLACK
- (IBAction)button_TWO:(id)sender {
    NSLog(@"FADE COLOR");
    [textField_TOP_02 setTextColor:[UIColor redColor]];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.5];
    [textField_TOP_02 setTextColor:[UIColor blackColor]];
    [UIView commitAnimations];
}

非常感谢

加里